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solene.rss.xml - sfeed_tests - sfeed tests and RSS and Atom files |
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git clone git://git.codemadness.org/sfeed_tests (git://git.codemadness.org) |
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Log |
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Files |
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Refs |
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README |
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LICENSE |
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--- |
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solene.rss.xml (66100B) |
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--- |
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1 <?xml version="1.0" encoding="UTF-8"?> |
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2 <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> |
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3 <channel> |
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4 <title>Solene's percent %</title> |
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5 <description></description> |
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6 <link>https://dataswamp.org/~solene/</link> |
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7 <atom:link href="https://dataswamp.org/~solene/rss.xml" rel="self" type="application/rss+xml" /> |
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8 <item> |
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9 <title>A curated non-violent games list</title> |
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10 <description> |
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11 <![CDATA[ |
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12 <p>For long time I wanted to share a list of non-violent games I |
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13 enjoyed, so here it is. Obviously, this list is FAR from being |
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14 complete and exhaustive. It contains games <strong>I played</strong> and that |
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15 I liked. They should all run on Linux and some on OpenBSD.</p> |
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16 |
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17 <p>Aside this list, most tycoon and puzzle games should be |
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18 non-violent.</p> |
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19 |
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20 <h2 id="automationbuildinggames">Automation / Building games</h2> |
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21 |
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22 <ul> |
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23 <li><a href="https://tobspr.itch.io/shapezio">Shapez.io</a></li> |
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24 </ul> |
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25 |
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26 <p>This game is like Factorio, you have to automate production lines |
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27 and increase the output of shapes/colors. Very time consuming.</p> |
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28 |
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29 <p>The project is <strong>Open source</strong> but you need to buy the game if |
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30 you don’t want to compile yourself. Or just use my compiled version |
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31 at <a href="https://perso.pw/shapez.io/">https://perso.pw/shapez.io/</a> |
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32 (require a chrome based browser…)</p> |
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33 |
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34 <ul> |
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35 <li><a href="https://www.openttd.org/">OpenTTD</a></li> |
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36 </ul> |
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37 |
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38 <p>A transport tycoon game, multiplayer possible! Very complex, |
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39 the community is active and you can find tons of mods.</p> |
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40 |
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41 <p>The game is <strong>Open source</strong> and you can certainly install it |
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42 on any distribution with the package manager.</p> |
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43 |
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44 <ul> |
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45 <li><a href="https://vfqd.itch.io/terra-nil">Terra Nil - Reclaim the wasteland</a></li> |
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46 </ul> |
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47 |
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48 <p>This game is about building equipments to restore the nature into |
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49 a wasteland, improve the biodiversity and then remove all your |
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50 structures.</p> |
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51 |
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52 <p>The game is not open source but is free of charge. The music |
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53 seems to be under an open licence. |
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54 Still, you can pay what you want for it to support the developer.</p> |
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55 |
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56 <ul> |
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57 <li><a href="https://vfqd.itch.io/everything-is-garbage">Everything is garbage</a></li> |
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58 </ul> |
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59 |
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60 <p>This is a short game about chaining producing buildings into another, |
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61 all from garbages up to some secret ending :)</p> |
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62 |
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63 <p>The game is not open source but is free of charge.</p> |
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64 |
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65 <h2 id="sandboxadventuregame">Sandbox / Adventure game</h2> |
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66 |
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67 <ul> |
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68 <li><a href="https://www.minetest.net/">Minetest</a></li> |
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69 </ul> |
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70 |
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71 <p>This game is a clone of Minecraft, it supports a lot of mods (which |
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72 can make the game very complex, like adding trains tracks with their |
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73 signals, the pinnacle of complexity :D). As far as I know, the game |
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74 now supports health but there are no fight involved.</p> |
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75 |
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76 <p>The game is <strong>Open source</strong> and free of charge.</p> |
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77 |
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78 <ul> |
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79 <li><a href="https://bynine.itch.io/forestssecret">Forest’s Secret</a></li> |
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80 </ul> |
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81 |
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82 <p>This game is about exploration in a forest. It has a nice |
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83 music, gameplay is easy.</p> |
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84 |
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85 <p>The game is not open source but it’s free. |
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86 Still, you can pay what you want for it to support the developer.</p> |
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87 |
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88 <h2 id="actionreflexgames">Action / reflex games</h2> |
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89 |
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90 <p>This category of games contains games that require |
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91 some reflexes or at least need to player to be |
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92 active to play.</p> |
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93 |
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94 <ul> |
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95 <li><a href="https://xmoto.tuxfamily.org/">Xmoto</a></li> |
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96 </ul> |
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97 |
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98 <p>This game is about driving a 2D motocross and |
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99 pass through obstacles, it can be very hard |
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100 and will challenge you for long time.</p> |
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101 |
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102 <p>it’s <strong>Open source</strong> and free of charge.</p> |
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103 |
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104 <ul> |
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105 <li><a href="https://kenney.itch.io/frick-inc">Frick. Inc</a></li> |
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106 </ul> |
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107 |
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108 <p>This is a fun game where you need to drive some big trucks only |
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109 <strong>using a displayed control panel with your mouse</strong> which make |
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110 things very hard.</p> |
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111 |
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112 <p>The game is not open source and not free, but the cost isn’t very |
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113 high (3.99€ at the moment from France).</p> |
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114 |
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115 <ul> |
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116 <li><a href="https://adamgryu.itch.io/a-short-hike">A short hike</a></li> |
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117 </ul> |
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118 |
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119 <p>This game is about a teenager character who is on vacation in a |
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120 place with no cell network, and you will have to make a hike and |
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121 meet people to go to the end. Very relaxing :)</p> |
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122 |
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123 <p>The game isn’t open source and isn’t free, but costs around 8€ at |
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124 the moment from France.</p> |
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125 |
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126 <ul> |
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127 <li><a href="https://www.gog.com/game/Train_Valley">Train valley</a></li> |
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128 </ul> |
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129 |
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130 <p>This game is about adding trains to tracks and avoid them |
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131 to crash. I found this game to be more about reflexes than |
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132 building, simulation or tycoon. You mostly need to route |
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133 the trains in real time.</p> |
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134 |
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135 <p>The game isn’t open source and not free but costs around 10€.</p> |
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136 |
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137 <h2 id="puzzlegameszachtronicsgames">Puzzle games (Zachtronics games)</h2> |
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138 |
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139 <p>What’s a Zachtronics game? It’s a game edited by Zachtronics! Every |
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140 game from this studio have a common pattern. You solve puzzles with |
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141 more and more complexes systems, you can compare your result in |
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142 speed / efficiency / steps to the others player. They are a mix in |
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143 between automation and puzzles. Those games are really good. There |
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144 are more than the 3 games I list, but I didn’t enjoy them all, |
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145 <a href="https://www.gog.com/games?devpub=zachtronics&page=1&sort=popularity">check the full list</a></p> |
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146 |
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147 <ul> |
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148 <li><a href="https://www.gog.com/game/opus_magnum">Opus Magnum</a></li> |
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149 </ul> |
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150 |
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151 <p>You play an alchemist who is asked to create product for a rich |
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152 family. You need to setup devices to transforms and combine |
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153 materials into the expected result.</p> |
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154 |
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155 <p>The game isn’t open source and isn’t free. The average cost is 20€.</p> |
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156 |
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157 <ul> |
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158 <li><a href="https://www.gog.com/game/infinifactory">Infinifactory</a></li> |
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159 </ul> |
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160 |
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161 <p>This game is in 3D, you receive materials on conveyor belts and you |
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162 will have to rotate and wield them to deliver the expect material.</p> |
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163 |
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164 <p>The game isn’t open source and isn’t free. The average cost is 20€.</p> |
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165 |
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166 <ul> |
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167 <li><a href="https://www.gog.com/game/tis100">Tis–100</a></li> |
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168 </ul> |
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169 |
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170 <p>This game is about writing code into assembly. There are calculations |
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171 units that will add/sub values from registers and pass it to another |
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172 unit. Even more fun if you print the old fashion instructions book!</p> |
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173 |
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174 <p>The game isn’t open source and isn’t free. The average cost is 10€.</p> |
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175 |
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176 <h2 id="visualnovel">Visual Novel</h2> |
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177 |
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178 <p><a href="https://www.gog.com/game/the_expression_amrilato">The expression Amrilato</a></p> |
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179 |
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180 <p>This game is about a japanese girl who ends in a parallel world where |
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181 everything seems similar but in this Japan, people talk Esperanto.</p> |
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182 |
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183 <p>The game isn’t open source and isn’t free. The average cost is 20€.</p> |
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184 |
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185 <h2 id="notveryviolent">Not very violent</h2> |
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186 |
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187 <p><a href="http://wayofthepassivefist.com/">Way of the Passive Fist</a></p> |
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188 |
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189 <p>I would like to add this game to this list. It’s a brawler (like |
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190 street of rage) in which you don’t fight people, but you only dodge |
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191 attacks to exhaust enemies or counter-attack. It’s still a bit |
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192 violent because it involves violence toward you, and throwing back |
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193 a knife would still be violent… But still, I think this is an |
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194 unique game that merits to be better known. :)</p> |
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195 |
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196 <p>The game isn’t open source and isn’t free, expect around 15€ for |
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197 it.</p> |
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198 |
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199 ]]> |
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200 </description> |
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201 <guid>https://dataswamp.org/~solene/2020-10-18-non-violent-games.html</guid> |
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202 <link>https://dataswamp.org/~solene/2020-10-18-non-violent-games.html</link> |
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203 <pubDate>Sun, 18 Oct 2020 00:00:00 GMT</pubDate> |
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204 </item> |
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205 <item> |
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206 <title>Making a home NAS using NixOS</title> |
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207 <description> |
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208 <![CDATA[ |
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209 <p>Still playing with <a href="https://nixos.org/">NixOS</a>, I wanted to experience |
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210 how difficult it would be to write a NixOS configuration file to |
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211 turn a computer into a simple NAS with basics features: samba |
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212 storage, dlna server and auto suspend/resume.</p> |
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213 |
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214 <p>What is <a href="https://nixos.org/features.html">NixOS</a>? As a reminder for |
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215 some and introduction to the others, NixOS is a Linux distribution |
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216 built by the Nix package manager, which make it very different than |
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217 any other operating system out there, except <a href="https://guix.gnu.org/">Guix</a> |
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218 which has a similar approach with their own package manager written |
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219 in Scheme.</p> |
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220 |
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221 <p>NixOS uses a declarative configuration approach along with lot of |
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222 others features derived from Nix. What’s big here is you no longer |
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223 tweak anything in <code>/etc</code> or install packages, you can define the |
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224 working state of the system in one configuration file. This system |
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225 is a totally different beast than the others OS and require some |
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226 time to understand how it work. Good news though, <strong>everything</strong> |
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227 is documented in the man page <code>configuration.nix</code>, from fstab |
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228 configuration to users managements or how to enable samba!</p> |
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229 |
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230 <p>Here is the <code>/etc/nixos/configuration.nix</code> file on my NAS.</p> |
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231 |
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232 <p>It enables ssh server, samba, minidlna and vnstat. Set up an user |
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233 with my ssh public key. Ready to work.</p> |
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234 |
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235 <p>Using <code>rtcwake</code> command (Linux specific), it’s possible to put |
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236 the system into standby mode and schedule an auto resume after |
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237 some time. This is triggered by a cron job at 01h00.</p> |
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238 |
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239 <pre><code>{ config, pkgs, ... }: |
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240 { |
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241 # include stuff related to hardware, auto generated at install |
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242 imports = ./hardware-configuration.nix ]; |
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243 boot.loader.grub.device = "/dev/sda"; |
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244 |
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245 # network configuration |
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246 networking.interfaces.enp3s0.ipv4.addresses = [ { |
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247 address = "192.168.42.150"; |
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248 prefixLength = 24; |
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249 } ]; |
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250 networking.defaultGateway = "192.168.42.1"; |
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251 networking.nameservers = [ "192.168.42.231" ]; |
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252 |
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253 # FR locales and layout |
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254 i18n.defaultLocale = "fr_FR.UTF-8"; |
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255 console = { font = "Lat2-Terminus16"; keyMap = "fr"; }; |
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256 time.timeZone = "Europe/Paris"; |
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257 |
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258 # Packages management |
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259 environment.systemPackages = with pkgs; [ |
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260 kakoune vnstat borgbackup utillinux |
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261 ]; |
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262 |
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263 # network disabled (I need to check the ports used first) |
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264 networking.firewall.enable = false; |
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265 |
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266 # services to enable |
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267 services.openssh.enable = true; |
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268 services.vnstat.enable = true; |
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269 |
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270 # auto standby |
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271 services.cron.systemCronJobs = [ |
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272 "0 1 * * * root rtcwake -m mem --date +6h" |
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273 ]; |
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274 |
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275 # samba service |
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276 services.samba.enable = true; |
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277 services.samba.enableNmbd = true; |
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278 services.samba.extraConfig = '' |
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279 workgroup = WORKGROUP |
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280 server string = Samba Server |
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281 server role = standalone server |
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282 log file = /var/log/samba/smbd.%m |
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283 max log size = 50 |
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284 dns proxy = no |
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285 map to guest = Bad User |
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286 ''; |
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287 services.samba.shares = { |
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288 public = { |
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289 path = "/home/public"; |
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290 browseable = "yes"; |
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291 "writable" = "yes"; |
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292 "guest ok" = "yes"; |
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293 "public" = "yes"; |
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294 "force user" = "share"; |
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295 }; |
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296 }; |
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297 |
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298 # minidlna service |
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299 services.minidlna.enable = true; |
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300 services.minidlna.announceInterval = 60; |
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301 services.minidlna.friendlyName = "Rorqual"; |
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302 services.minidlna.mediaDirs = ["A,/home/public/Musique/" "V,/home/public/Videos/"]; |
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303 |
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304 # trick to create a directory with proper ownership |
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305 # note that tmpfiles are not necesserarly temporary if you don't |
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306 # set an expire time. Trick given on irc by someone I forgot the name.. |
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307 systemd.tmpfiles.rules = [ "d /home/public 0755 share users" ]; |
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308 |
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309 # create my user, with sudo right and my public ssh key |
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310 users.users.solene = { |
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311 isNormalUser = true; |
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312 extraGroups = [ "wheel" "sudo" ]; |
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313 openssh.authorizedKeys.keys = [ |
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314 "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOIZKLFQXVM15viQXHYRjGqE4LLfvETMkjjgSz0mzMzS personal" |
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315 "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOIZKLFQXVM15vAQXBYRjGqE6L1fvETMkjjgSz0mxMzS pro" |
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316 ]; |
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317 }; |
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318 |
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319 # create a dedicated user for the shares |
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320 # I prefer a dedicated one than "nobody" |
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321 # can't log into it |
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322 users.users.share= { |
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323 isNormalUser = false; |
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324 }; |
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325 } |
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326 </code></pre> |
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327 |
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328 ]]> |
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329 </description> |
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330 <guid>https://dataswamp.org/~solene/2020-10-18-nixos-nas.html</guid> |
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331 <link>https://dataswamp.org/~solene/2020-10-18-nixos-nas.html</link> |
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332 <pubDate>Sun, 18 Oct 2020 00:00:00 GMT</pubDate> |
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333 </item> |
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334 <item> |
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335 <title>NixOS optional features in packages</title> |
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336 <description> |
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337 <![CDATA[ |
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338 <p>As a claws-mail user, I like to have calendar support in the mail |
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339 client to be able to “accept” invitations. In the default NixOS |
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340 claws-mail package, the vcalendar module isn’t installed with the |
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341 package. Still, it is possible to add support for the vcalendar |
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342 module without ugly hack.</p> |
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343 |
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344 <p>It turns out, by default, the claws-mail package in Nixpkg has an |
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345 optional build option for the vcalendar module, we need to tell |
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346 nixpkg we want this module and claws-mail will be compiled.</p> |
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347 |
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348 <p>As stated in the <a href="https://nixos.org/manual/nixos/stable/#sec-customising-packages">NixOS |
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349 manual</a>, |
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350 the optionals features can’t be searched yet. So what’s possible |
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351 is to search for your package in the <a href="https://search.nixos.org/packages">NixOS packages |
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352 search</a>, click on the package |
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353 name to get to the details and click on the link named “Nix expression” |
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354 that will open a link to the package definition on GitHUB, <a href="https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/networking/mailreaders/claws-mail/default.nix#L111">claws-mail |
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355 nix |
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356 expression</a></p> |
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357 |
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358 <p>As you can see on the claws-mail nix expression code, there are lot |
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359 of lines with <strong>optional</strong>, those are features we can enable. Here |
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360 is a sample:</p> |
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361 |
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362 <pre><code>[..] |
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363 ++ optional (!enablePluginArchive) "--disable-archive-plugin" |
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364 ++ optional (!enablePluginLitehtmlViewer) "--disable-litehtml_viewer-plugin" |
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365 ++ optional (!enablePluginPdf) "--disable-pdf_viewer-plugin" |
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366 ++ optional (!enablePluginPython) "--disable-python-plugin" |
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367 [..] |
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368 </code></pre> |
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369 |
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370 <p>In your <code>configuration.nix</code> file, where you define the package list |
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371 you want, you can tell you want to enable the plugin vcalendar, |
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372 this is done as in the following example:</p> |
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373 |
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374 <pre><code>environment.systemPackages = with pkgs; [ |
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375 kakoune git firefox irssi minetest |
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376 (pkgs.claws-mail.override { enablePluginVcalendar = true;}) |
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377 ]; |
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378 </code></pre> |
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379 |
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380 <p>When you rebuild your system to match the configuration definition, |
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381 claws-mail will be compiled with the extras options you defined.</p> |
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382 |
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383 <p>Now, I have claws-mail with vCalendar support.</p> |
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384 |
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385 ]]> |
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386 </description> |
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387 <guid>https://dataswamp.org/~solene/2020-10-14-nixos-custom-packages.html</guid> |
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388 <link>https://dataswamp.org/~solene/2020-10-14-nixos-custom-packages.html</link> |
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389 <pubDate>Wed, 14 Oct 2020 00:00:00 GMT</pubDate> |
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390 </item> |
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391 <item> |
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392 <title>Unlock a full disk encryption NixOS with usb memory stick</title> |
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393 <description> |
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394 <![CDATA[ |
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395 <p>Using NixOS on a laptop on which the keyboard isn’t detected when |
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396 I need to type the password to decrypt disk, I had to find a solution. |
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397 This problem is hardware related, not Linux or NixOS related.</p> |
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398 |
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399 <p><strong>I highly recommend using full disk encryption on every computer |
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400 following a thief threat model. Having your computer stolen is bad, |
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401 but if the thief has access to all your data, you will certainly |
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402 be in trouble.</strong></p> |
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403 |
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404 <p>This was time to find how to use an usb memory stick to unlock the |
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405 full disk encryption in case I don’t have my hands on an usb keyboard |
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406 to unlock the computer.</p> |
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407 |
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408 <p>There are 4 steps to enable unlocking the luks volume using a device.</p> |
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409 |
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410 <ol> |
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411 <li>Create the key</li> |
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412 <li>Add the key on the luks volume</li> |
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413 <li>Write the key on the usb device</li> |
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414 <li>Configure NixOS</li> |
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415 </ol> |
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416 |
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417 <p>First step, creating the file. The easiest way is to the following:</p> |
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418 |
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419 <pre><code># dd if=/dev/urandom of=/root/key.bin bs=4096 count=1 |
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420 </code></pre> |
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421 |
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422 <p>This will create a 4096 bytes key. You can choose the size you want.</p> |
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423 |
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424 <p>Second step is to register that key in the luks volume, you will |
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425 be prompted for luks password when doing so.</p> |
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426 |
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427 <pre><code># cryptsetup luksAddKey /dev/sda1 /root/key.bin |
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428 </code></pre> |
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429 |
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430 <p>Then, it’s time to write the key to your usb device, I assume it |
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431 will be <code>/dev/sdb</code>.</p> |
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432 |
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433 <pre><code># dd if=/root/key.bin of=/dev/sdb bs=4096 count=1 |
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434 </code></pre> |
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435 |
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436 <p>And finally, you will need to configure NixOS to give the information |
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437 about the key. It’s important to give the correct size of the key. |
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438 Don’t forget to adapt <code>"crypted"</code> to your luks volume name.</p> |
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439 |
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440 <pre><code>boot.initrd.luks.devices."crypted".keyFileSize = 4096; |
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441 boot.initrd.luks.devices."crypted".keyFile = "/dev/sdb"; |
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442 </code></pre> |
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443 |
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444 <p>Rebuild your system with <code>nixos-rebuild switch</code> and voilà!</p> |
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445 |
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446 <h3 id="goingfurther">Going further</h3> |
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447 |
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448 <p>I recommend using the fallback to password feature so if you |
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449 lose or don’t have your memory stick, you can type the password to |
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450 unlock the disk. Note that you need to not put anything looking |
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451 like a <code>/dev/sdb</code> because if it exists and no key are there, the |
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452 system won’t ask for password, and you will need to reboot.</p> |
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453 |
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454 <pre><code>boot.initrd.luks.devices."crypted".fallbackToPassword = true; |
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455 </code></pre> |
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456 |
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457 <p>It’s also possible to write the key in a partition or at a specific |
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458 offset into your memory disk. For this, look at |
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459 <code>boot.initrd.luks.devices."volume".keyFileOffset</code> entry.</p> |
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460 |
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461 ]]> |
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462 </description> |
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463 <guid>https://dataswamp.org/~solene/2020-10-06-nixos-luks-key.html</guid> |
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464 <link>https://dataswamp.org/~solene/2020-10-06-nixos-luks-key.html</link> |
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465 <pubDate>Tue, 06 Oct 2020 00:00:00 GMT</pubDate> |
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466 </item> |
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467 <item> |
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468 <title>Playing chess by email</title> |
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469 <description> |
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470 <![CDATA[ |
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471 <p>It’s possible to play chess using email. This is possible because |
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472 there are notations like PGN (Portable Game Notation) that describe |
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473 the state of a game.</p> |
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474 |
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475 <p>By playing on your computer and sending the PGN of the game to |
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476 your opponent, that person will be able to play their move and |
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477 send you the new PGN so you can play.</p> |
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478 |
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|
479 <h2 id="usingxboard">Using xboard</h2> |
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480 |
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481 <p>This is quite easy with xboard (which should be available in most |
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482 bsd/linux/unix distributions), as long as you are aware of the few |
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483 keybindings.</p> |
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484 |
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485 <p>When you start a game, press <strong>Ctrl+E</strong> to enter edition mode, this |
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486 will prevent the AI to play, then make your move.</p> |
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487 |
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488 <p>From there, you can press <strong>Ctrl+C</strong> to copy the state of the game. |
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|
489 You will have something like this in your clipboard.</p> |
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490 |
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|
491 <pre><code>[Event "Edited game"] |
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492 [Site "solene.local"] |
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493 [Date "2020.09.28"] |
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494 [Round "-"] |
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495 [White "-"] |
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496 [Black "-"] |
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497 [Result "*"] |
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498 |
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499 1. d3 |
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500 * |
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501 </code></pre> |
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502 |
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503 <p>You can send this to your opponent, but the only needed data is <code>1. |
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504 d3</code> which is the PGN notation of the moves. You can throw the rest.</p> |
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505 |
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506 <p>In a more advanced game, you will end up mailing this kind of data:</p> |
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507 |
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|
508 <pre><code>1. d3 e6 2. e4 f5 3. exf5 exf5 4. Qe2+ Be7 5. Qxe7+ Qxe7+ |
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509 </code></pre> |
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510 |
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|
511 <p>When you want to play your turn, load that line and press <strong>Ctrl+V</strong>, |
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512 you should see the moves happening on the board.</p> |
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513 |
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|
514 <h2 id="usinggnuchess">Using gnuchess</h2> |
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515 |
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|
516 <p>gnuchess allow playing chess in command line.</p> |
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517 |
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518 <p>When you want to start a game, you will have a prompt, type <code>manual</code> |
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519 to not play against the AI. I recommend using <code>coords</code> to display |
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|
|
520 coordinates on the axis of the board.</p> |
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521 |
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|
|
522 <p>When you type <code>show board</code> you will have this display:</p> |
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523 |
|
|
|
524 <pre><code> white KQkq |
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525 |
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|
526 8 r n b q k b n r |
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|
527 7 p p p p p p p p |
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|
528 6 . . . . . . . . |
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529 5 . . . . . . . . |
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|
530 4 . . . . . . . . |
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|
531 3 . . . . . . . . |
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|
532 2 P P P P P P P P |
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|
533 1 R N B Q K B N R |
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|
534 a b c d e f g h |
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|
|
535 </code></pre> |
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536 |
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|
537 <p>Then, I can type <code>d3</code> I get a display</p> |
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538 |
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|
|
539 <pre><code>8 r n b q k b n r |
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|
540 7 p p p p p p p p |
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|
541 6 . . . . . . . . |
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|
542 5 . . . . . . . . |
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|
543 4 . . . . . . . . |
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|
544 3 . . . P . . . . |
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|
545 2 P P P . P P P P |
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|
546 1 R N B Q K B N R |
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|
547 a b c d e f g h |
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|
548 </code></pre> |
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|
549 |
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|
550 <p>From the game, you can save the game using <code>pgnsave FILE</code> |
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|
551 and load a game using <code>pgnload FILE</code>.</p> |
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552 |
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|
553 <p>You can see the list of the moves using <code>show game</code>.</p> |
|
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|
554 |
|
|
|
555 ]]> |
|
|
|
556 </description> |
|
|
|
557 <guid>https://dataswamp.org/~solene/2020-09-28-chess.html</guid> |
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|
558 <link>https://dataswamp.org/~solene/2020-09-28-chess.html</link> |
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|
559 <pubDate>Mon, 28 Sep 2020 00:00:00 GMT</pubDate> |
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|
560 </item> |
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|
561 <item> |
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|
562 <title>About pipelining OpenBSD ports contributions</title> |
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|
563 <description> |
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|
564 <![CDATA[ |
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565 <p>After modest contributions to the NixOS operating system which made |
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566 me learn about the contribution process, I found enjoyable to have |
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567 an automatic report and feedback about the quality of the submitted |
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|
568 work. While on NixOS this requires GitHub, I think this could be |
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|
569 applied as well on OpenBSD and the mailing list contributing system.</p> |
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570 |
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571 <p>I made a prototype before starting the real work and actually I’m |
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|
|
572 happy with the result.</p> |
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573 |
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|
574 <p>This is what I get after feeding the script with a mail containing |
|
|
|
575 a patch:</p> |
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|
576 |
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|
|
577 <pre><code>Determining package path ✓ |
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|
578 Verifying patch isn't committed ✓ |
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|
579 Applying the patch ✓ |
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|
580 Fetching distfiles ✓ |
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|
|
581 Distfile checksum ✓ |
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|
|
582 Applying ports patches ✓ |
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|
|
583 Extracting sources ✓ |
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|
|
584 Building result ✓ |
|
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|
585 </code></pre> |
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586 |
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|
|
587 <p>It requires a lot of checks to find a patch in the file, because |
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|
588 we have have patches generated from cvs or git which have a slightly |
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|
|
589 different output. And then, we need to find from where to apply |
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|
|
590 this patch.</p> |
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591 |
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|
592 <p>The idea would be to retrieve mails sent to ports@openbsd.org by |
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|
|
593 subscribing, then store metadata about that submission into a |
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|
594 database:</p> |
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|
595 |
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|
|
596 <pre><code>Sender |
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|
597 Date |
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|
598 Diff (raw text) |
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|
599 Status (already committed, doesn't apply, apply, compile) |
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|
600 </code></pre> |
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|
601 |
|
|
|
602 <p>Then, another program will pick a diff from the database, prepare a VM using a |
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|
603 derivated qcow2 disk from a base image so it always start fresh and |
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|
604 clean and ready, and do the checks within the VM.</p> |
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605 |
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|
606 <p>Once it is finished, a mail could be sent as a reply to the original |
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|
607 mail to give the status of each step until error or last check. The |
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608 database could be reused to make a web page to track what compiles |
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|
609 but is not yet committed. As it’s possible to verify if a patch is |
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|
610 committed in the tree, this can automatically prune committed patches |
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|
611 over time.</p> |
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|
612 |
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|
613 <p>I really think this can improve tracking patches sent to ports@ and |
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|
614 ease the contribution process.</p> |
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|
615 |
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|
616 <p><strong>DISCLAIMER</strong></p> |
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617 |
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|
|
618 <ul> |
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|
619 <li>This would not be an official part of the project, I do it on my own</li> |
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|
620 <li>This may be cancelled</li> |
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|
621 <li>This may be a bad idea</li> |
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|
622 <li>This could be used “as a service” instead of pulling automatically |
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|
623 from ports, meaning people could send mails to it to receive an |
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|
624 automatic review. Ideally this should be done in portcheck(1) but |
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|
625 I’m not sure how to verify a diff apply on the ports tree without |
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|
626 enforcing requirements</li> |
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|
627 <li><strong>Human work will still be required to check the content and verify |
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|
|
628 the port works correctly!</strong></li> |
|
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|
629 </ul> |
|
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|
630 |
|
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|
631 ]]> |
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|
|
632 </description> |
|
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|
633 <guid>https://dataswamp.org/~solene/2020-09-27-pipeline-ports.html</guid> |
|
|
|
634 <link>https://dataswamp.org/~solene/2020-09-27-pipeline-ports.html</link> |
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|
|
635 <pubDate>Sun, 27 Sep 2020 00:00:00 GMT</pubDate> |
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|
636 </item> |
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|
|
637 <item> |
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|
|
638 <title>Docker cheatsheet</title> |
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|
639 <description> |
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|
640 <![CDATA[ |
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|
|
641 <p>Simple Docker cheatsheet. This is a short introduction about Docker usage |
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|
|
642 and common questions I have been asking myself about Docker.</p> |
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|
643 |
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|
644 <p>The official documentation for building docker images can be <a href="https://docs.docker.com/develop/">found |
|
|
|
645 here</a></p> |
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|
646 |
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|
|
647 <h2 id="buildanimage">Build an image</h2> |
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|
648 |
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|
649 <p>Building an image is really easy. As a requirement, you need to be |
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|
|
650 in a directory that can contain data you will use for building the |
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|
651 image but most importantly, you need a <code>Dockerfile</code> file.</p> |
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|
652 |
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|
653 <p>The Dockerfile file hold all the instructions to create the container. |
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|
654 A simple example would be this description:</p> |
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|
655 |
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|
|
656 <pre><code>FROM busybox |
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|
657 CMD "echo" "hello world" |
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|
|
658 </code></pre> |
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|
659 |
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|
|
660 <p>This will create a docker container using busybox base image |
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|
661 and run <code>echo "hello world"</code> when you run it.</p> |
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|
662 |
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|
|
663 <p>To create the container, use the following command in the same |
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|
664 directory in which Dockerfile is:</p> |
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|
665 |
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|
|
666 <pre><code>$ docker build -t your-image-name . |
|
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|
667 </code></pre> |
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|
668 |
|
|
|
669 <h2 id="advancedimagebuilding">Advanced image building</h2> |
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|
670 |
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|
671 <p>If you need to compile sources to distribute a working binary, |
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|
672 you need to prepare the environment to have the required |
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|
673 dependencies to compile and then you need to compile a static |
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|
674 binary to ship the container without all the dependencies.</p> |
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|
675 |
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|
|
676 <p>In the following example we will use a debian environment to build |
|
|
|
677 the software downloaded by git.</p> |
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|
|
678 |
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|
|
679 <pre><code>FROM debian as work |
|
|
|
680 WORKDIR /project |
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|
681 |
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|
|
682 RUN apt-get update |
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|
|
683 RUN apt-get install -y git make gcc |
|
|
|
684 RUN git clone git://bitreich.org/sacc /project |
|
|
|
685 RUN apt-get install -y libncurses5-dev libncurses5 |
|
|
|
686 RUN make LDFLAGS="-static -lncurses -ltinfo" |
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|
687 |
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|
|
688 FROM debian |
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|
689 |
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|
|
690 COPY --from=work /project/sacc /usr/local/bin/sacc |
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|
691 |
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|
|
692 CMD "sacc" "gopherproject.org" |
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|
693 </code></pre> |
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|
694 |
|
|
|
695 <p>I won’t explain every command here, but you may see that I have |
|
|
|
696 split the packages installation in two commands. This was to help |
|
|
|
697 debugging.</p> |
|
|
|
698 |
|
|
|
699 <p>The trick here is that the docker build process has a cache feature. |
|
|
|
700 Every time you use a <code>FROM</code>, <code>COPY</code>, <code>RUN</code> or <code>CMD</code> docker will |
|
|
|
701 cache the current state of the build process, if you re-run the |
|
|
|
702 process docker will be able to pick up the most recent state until |
|
|
|
703 the change.</p> |
|
|
|
704 |
|
|
|
705 <p>I wasn’t sure how to compile statically the software at first, and |
|
|
|
706 having to install git make and gcc and run git clone EVERY TIME |
|
|
|
707 was very time consuming and bandwidth consuming.</p> |
|
|
|
708 |
|
|
|
709 <p>In case you run this build and it fails, you can re-run the build |
|
|
|
710 and docker will catch up directly at the last working step.</p> |
|
|
|
711 |
|
|
|
712 <p>If you change a line, docker will reuse the last state with a |
|
|
|
713 FROM/COPY/RUN/CMD command before the changed line. Knowing about |
|
|
|
714 this is really important for more efficient cache use.</p> |
|
|
|
715 |
|
|
|
716 <h2 id="runanimage">Run an image</h2> |
|
|
|
717 |
|
|
|
718 <p>With the previously locally built image we can run it with the command:</p> |
|
|
|
719 |
|
|
|
720 <pre><code>$ docker run your-image-name |
|
|
|
721 hello world |
|
|
|
722 </code></pre> |
|
|
|
723 |
|
|
|
724 <p>By default, when you use an image name to run, if you don’t have a |
|
|
|
725 local image that match the name <em>docker</em> will check on the docker |
|
|
|
726 official repository if an image exists, if so, it will be pulled |
|
|
|
727 and run.</p> |
|
|
|
728 |
|
|
|
729 <pre><code>$ docker run hello-world |
|
|
|
730 </code></pre> |
|
|
|
731 |
|
|
|
732 <p>This is a sample official container that will display some |
|
|
|
733 explanations about docker.</p> |
|
|
|
734 |
|
|
|
735 <p>If you want to try a gopher client, I made a docker version of it |
|
|
|
736 that you can run with the following command:</p> |
|
|
|
737 |
|
|
|
738 <pre><code>$ docker run -t -i rapennesolene/sacc |
|
|
|
739 </code></pre> |
|
|
|
740 |
|
|
|
741 <p>Why did you require <code>-t</code> and <code>-i</code> parameters? The former |
|
|
|
742 is to tell docker you want a tty because it will manipulate |
|
|
|
743 a terminal and the latter is to ask an interactive session.</p> |
|
|
|
744 |
|
|
|
745 <h2 id="persistantdata">Persistant data</h2> |
|
|
|
746 |
|
|
|
747 <p>By default, every data of the docker container get wiped out |
|
|
|
748 once it stops, which may be really undesirable if you use |
|
|
|
749 docker to deploy a service that has a state and require an |
|
|
|
750 installation, configuration files etc…</p> |
|
|
|
751 |
|
|
|
752 <p>Docker has two ways to solve it:</p> |
|
|
|
753 |
|
|
|
754 <p>1) map a local directory |
|
|
|
755 2) map a docker volume name</p> |
|
|
|
756 |
|
|
|
757 <p>This is done with the parameter <code>-v</code> with the <code>docker run</code> command.</p> |
|
|
|
758 |
|
|
|
759 <pre><code>$ docker run -v data:/var/www/html/ nextcloud |
|
|
|
760 </code></pre> |
|
|
|
761 |
|
|
|
762 <p>This will map a persistent storage named “data” on the host |
|
|
|
763 on the path <code>/var/www/html</code> in the docker instance. By using <code>data</code>, |
|
|
|
764 docker will check if <code>/var/lib/docker/volumes/data</code> exists, if so |
|
|
|
765 it will reuse it and if not it will create it.</p> |
|
|
|
766 |
|
|
|
767 <p>This is a convenient way to name volumes and let docker manage it.</p> |
|
|
|
768 |
|
|
|
769 <p>The other way is to map a local path to a container environment |
|
|
|
770 path.</p> |
|
|
|
771 |
|
|
|
772 <pre><code>$ docker run -v /home/nextcloud:/var/www/html nextcloud |
|
|
|
773 </code></pre> |
|
|
|
774 |
|
|
|
775 <p>In this case, the directory <code>/home/nextcloud</code> on the host and |
|
|
|
776 <code>/var/www/html</code> in the docker environment will be the same directory.</p> |
|
|
|
777 |
|
|
|
778 ]]> |
|
|
|
779 </description> |
|
|
|
780 <guid>https://dataswamp.org/~solene/2020-09-24-docker-cheatsheet.html</guid> |
|
|
|
781 <link>https://dataswamp.org/~solene/2020-09-24-docker-cheatsheet.html</link> |
|
|
|
782 <pubDate>Thu, 24 Sep 2020 00:00:00 GMT</pubDate> |
|
|
|
783 </item> |
|
|
|
784 <item> |
|
|
|
785 <title>A few tips about the command cd</title> |
|
|
|
786 <description> |
|
|
|
787 <![CDATA[ |
|
|
|
788 <p>While everyone familiar with a shell know about the command <code>cd</code> |
|
|
|
789 there are a few tips you should know.</p> |
|
|
|
790 |
|
|
|
791 <h3 id="movingtoyourhomedirectory">Moving to your $HOME directory</h3> |
|
|
|
792 |
|
|
|
793 <pre><code>$ pwd |
|
|
|
794 /tmp |
|
|
|
795 $ cd |
|
|
|
796 $ pwd |
|
|
|
797 /home/solene |
|
|
|
798 </code></pre> |
|
|
|
799 |
|
|
|
800 <p>Using <code>cd</code> without argument will change your current directory to |
|
|
|
801 your $HOME.</p> |
|
|
|
802 |
|
|
|
803 <h3 id="movingintosomeonehomedirectory">Moving into someone $HOME directory</h3> |
|
|
|
804 |
|
|
|
805 <p>While this should fail most of the time because people shouldn’t allow |
|
|
|
806 anyone to visit their $HOME, there are use case it can be used though.</p> |
|
|
|
807 |
|
|
|
808 <pre><code>$ cd ~user1 |
|
|
|
809 $ pwd |
|
|
|
810 /home/user1 |
|
|
|
811 $ cd ~solene |
|
|
|
812 $ pwd |
|
|
|
813 /home/solene |
|
|
|
814 </code></pre> |
|
|
|
815 |
|
|
|
816 <p>Using <code>~user</code> as a parameter will move to that user $HOME directory, |
|
|
|
817 note that <code>cd</code> and <code>cd ~youruser</code> have the same result.</p> |
|
|
|
818 |
|
|
|
819 <h3 id="movingtopreviousdirectory">Moving to previous directory</h3> |
|
|
|
820 |
|
|
|
821 <p>This is a very useful command which allow going back and forth between |
|
|
|
822 two directories.</p> |
|
|
|
823 |
|
|
|
824 <pre><code>$ pwd |
|
|
|
825 /home/solene |
|
|
|
826 $ cd /tmp |
|
|
|
827 $ pwd |
|
|
|
828 /tmp |
|
|
|
829 $ cd - |
|
|
|
830 /home/solene |
|
|
|
831 $ pwd |
|
|
|
832 /home/solene |
|
|
|
833 </code></pre> |
|
|
|
834 |
|
|
|
835 <p>When you use <code>cd -</code> the command will move to the previous directory |
|
|
|
836 in which you were. There are two special variables in your shell: |
|
|
|
837 <code>PWD</code> and <code>OLDPWD</code>, when you move somewhere, <code>OLDPWD</code> will hold |
|
|
|
838 your current location before moving and then <code>PWD</code> hold the new |
|
|
|
839 path. When you use <code>cd -</code> the two variables get exchanged, this |
|
|
|
840 mean you can only jump from two paths using <code>cd -</code> multiple times.</p> |
|
|
|
841 |
|
|
|
842 <p>Please note that when using <code>cd -</code> your new location is displayed.</p> |
|
|
|
843 |
|
|
|
844 <h3 id="changingdirectorybymodifyingcurrentpwd">Changing directory by modifying current PWD</h3> |
|
|
|
845 |
|
|
|
846 <p>thfr@ showed me a cd feature I never heard about, and it’s the |
|
|
|
847 perfect place to write about it. Note that this work in ksh and zsh |
|
|
|
848 but is reported to not work in bash.</p> |
|
|
|
849 |
|
|
|
850 <p>One example will explain better than any text.</p> |
|
|
|
851 |
|
|
|
852 <pre><code>$ pwd |
|
|
|
853 /tmp/pobj/foobar-1.2.0/work |
|
|
|
854 $ cd 1.2.0 2.4.0 |
|
|
|
855 /tmp/pobj/foobar-2.4.0/work |
|
|
|
856 </code></pre> |
|
|
|
857 |
|
|
|
858 <p>This tells <code>cd</code> to replace first parameter pattern by the second |
|
|
|
859 parameter in the current <code>PWD</code> and then cd into it.</p> |
|
|
|
860 |
|
|
|
861 <pre><code>$ pwd |
|
|
|
862 /home/solene |
|
|
|
863 $ cd solene user1 |
|
|
|
864 /home/user1 |
|
|
|
865 </code></pre> |
|
|
|
866 |
|
|
|
867 <p>This could be done in a bloated way with the following command:</p> |
|
|
|
868 |
|
|
|
869 <pre><code>$ cd $(echo $PWD | sed "s/solene/user1/") |
|
|
|
870 </code></pre> |
|
|
|
871 |
|
|
|
872 <p>I learned it a few minutes ago but I see a lot of uses cases where |
|
|
|
873 I could use it.</p> |
|
|
|
874 |
|
|
|
875 <h3 id="movingintothecurrentdirectoryafterremoval">Moving into the current directory after removal</h3> |
|
|
|
876 |
|
|
|
877 <p>In some specific case, like having your shell into a directory that |
|
|
|
878 existed but was deleted and removed (this happens often when you |
|
|
|
879 working into compilation directories).</p> |
|
|
|
880 |
|
|
|
881 <p>A simple trick is to tell <code>cd</code> to go to the current location.</p> |
|
|
|
882 |
|
|
|
883 <pre><code>$ cd . |
|
|
|
884 </code></pre> |
|
|
|
885 |
|
|
|
886 <p>or</p> |
|
|
|
887 |
|
|
|
888 <pre><code>$ cd $PWD |
|
|
|
889 </code></pre> |
|
|
|
890 |
|
|
|
891 <p>And <code>cd</code> will go into the same path and you can start hacking |
|
|
|
892 again in that directory.</p> |
|
|
|
893 |
|
|
|
894 ]]> |
|
|
|
895 </description> |
|
|
|
896 <guid>https://dataswamp.org/~solene/2020-09-04-cd-command.html</guid> |
|
|
|
897 <link>https://dataswamp.org/~solene/2020-09-04-cd-command.html</link> |
|
|
|
898 <pubDate>Fri, 04 Sep 2020 00:00:00 GMT</pubDate> |
|
|
|
899 </item> |
|
|
|
900 <item> |
|
|
|
901 <title>Find which package provides a given file in OpenBSD</title> |
|
|
|
902 <description> |
|
|
|
903 <![CDATA[ |
|
|
|
904 <p>There is one very handy package on OpenBSD named <code>pkglocatedb</code> |
|
|
|
905 which provides the command <code>pkglocate</code>.</p> |
|
|
|
906 |
|
|
|
907 <p>If you need to find a file or binary/program and you don’t know |
|
|
|
908 which package contains it, use pkglocate.</p> |
|
|
|
909 |
|
|
|
910 <pre><code>$ pkglocate */bin/exiftool |
|
|
|
911 p5-Image-ExifTool-12.00:graphics/p5-Image-ExifTool:/usr/local/bin/exiftool |
|
|
|
912 </code></pre> |
|
|
|
913 |
|
|
|
914 <p>With the result, I know that the package <code>p5-Image-ExifTool</code> will provide me |
|
|
|
915 the command <code>exiftool</code>.</p> |
|
|
|
916 |
|
|
|
917 <p>Another example looking for files containing the pattern “libc++”</p> |
|
|
|
918 |
|
|
|
919 <pre><code>$ pkglocate libc++ |
|
|
|
920 base67:/usr/lib/libc++.so.5.0 |
|
|
|
921 base67:/usr/lib/libc++abi.so.3.0 |
|
|
|
922 comp67:/usr/lib/libc++.a |
|
|
|
923 comp67:/usr/lib/libc++_p.a |
|
|
|
924 comp67:/usr/lib/libc++abi.a |
|
|
|
925 comp67:/usr/lib/libc++abi_p.a |
|
|
|
926 qt4-4.8.7p23:x11/qt4,-main:/usr/local/lib/qt4/mkspecs/unsupported/macx-clang-libc++/ |
|
|
|
927 qt4-4.8.7p23:x11/qt4,-main:/usr/local/lib/qt4/mkspecs/unsupported/macx-clang-libc++/Info.plist.app |
|
|
|
928 qt4-4.8.7p23:x11/qt4,-main:/usr/local/lib/qt4/mkspecs/unsupported/macx-clang-libc++/Info.plist.lib |
|
|
|
929 qt4-4.8.7p23:x11/qt4,-main:/usr/local/lib/qt4/mkspecs/unsupported/macx-clang-libc++/qmake.conf |
|
|
|
930 qt4-4.8.7p23:x11/qt4,-main:/usr/local/lib/qt4/mkspecs/unsupported/macx-clang-libc++/qplatformdefs.h |
|
|
|
931 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++-32/ |
|
|
|
932 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++-32/qmake.conf |
|
|
|
933 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++-32/qplatformdefs.h |
|
|
|
934 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++/ |
|
|
|
935 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++/qmake.conf |
|
|
|
936 qtbase-5.13.2p0:x11/qt5/qtbase,-main:/usr/local/lib/qt5/mkspecs/linux-clang-libc++/qplatformdefs.h |
|
|
|
937 </code></pre> |
|
|
|
938 |
|
|
|
939 <p>As you can see, base sets are also in the database used by pkglocate, |
|
|
|
940 so you can easily find if a file is from a set (that you should |
|
|
|
941 have) or if the file comes from a package.</p> |
|
|
|
942 |
|
|
|
943 <h2 id="findwhichpackageinstalledafile">Find which package installed a file</h2> |
|
|
|
944 |
|
|
|
945 <p>Klemmens Nanni (kn@) told me it’s possible to find which package |
|
|
|
946 installed a file present in the filesystem using <code>pkg_info</code> command |
|
|
|
947 which comes from the base system. This can be handy to know from |
|
|
|
948 which package an installed file comes from, without requiring |
|
|
|
949 pkglocatedb.</p> |
|
|
|
950 |
|
|
|
951 <pre><code>$ pkg_info -E /usr/local/bin/convert |
|
|
|
952 /usr/local/bin/convert: ImageMagick-6.9.10.86p0 |
|
|
|
953 ImageMagick-6.9.10.86p0 image processing tools |
|
|
|
954 </code></pre> |
|
|
|
955 |
|
|
|
956 <p>This tells me <code>convert</code> binary was installed by ImageMagick package.</p> |
|
|
|
957 |
|
|
|
958 ]]> |
|
|
|
959 </description> |
|
|
|
960 <guid>https://dataswamp.org/~solene/2020-09-04-pkglocate-openbsd.html</guid> |
|
|
|
961 <link>https://dataswamp.org/~solene/2020-09-04-pkglocate-openbsd.html</link> |
|
|
|
962 <pubDate>Fri, 04 Sep 2020 00:00:00 GMT</pubDate> |
|
|
|
963 </item> |
|
|
|
964 <item> |
|
|
|
965 <title>Download files listed in a http index with wget</title> |
|
|
|
966 <description> |
|
|
|
967 <![CDATA[ |
|
|
|
968 <p>Sometimes I need to download files through http from a list on an “autoindex” |
|
|
|
969 page and it’s always painful to find a correct command for this.</p> |
|
|
|
970 |
|
|
|
971 <p>The easy solution is <strong>wget</strong> but you need to use the correct parameters |
|
|
|
972 because wget has a lot of mirroring options but you only want specific ones to |
|
|
|
973 achieve this goal.</p> |
|
|
|
974 |
|
|
|
975 <p>I ended up with the following command:</p> |
|
|
|
976 |
|
|
|
977 <pre><code>wget --continue --accept "*.tgz" --no-directories --no-parent --recursive http://ftp.fr.openbsd.org/pub/OpenBSD/6.7/amd64/ |
|
|
|
978 </code></pre> |
|
|
|
979 |
|
|
|
980 <p>This will download every tgz files available at the address given as last parameter.</p> |
|
|
|
981 |
|
|
|
982 <p>The parameters given will filter to only download the <strong>tgz</strong> files, put the |
|
|
|
983 files in the current working directory and most important, don’t try to escape |
|
|
|
984 to the parent directory to start downloading again. The `–continue`` parameter |
|
|
|
985 allow to interrupt wget and start again, downloaded file will be skipped and |
|
|
|
986 partially downloaded files will be completed.</p> |
|
|
|
987 |
|
|
|
988 <p><strong>Do not reuse this command if files changed on the remote server</strong> because |
|
|
|
989 continue feature only work if your local file and the remote file are the same, |
|
|
|
990 this simply look at the local and remote names and will ask the remote server |
|
|
|
991 to start downloading at the current byte range of your local file. If meanwhile |
|
|
|
992 the remote file changed, you will have a mix of the old and new file.</p> |
|
|
|
993 |
|
|
|
994 <p>Obviously ftp protocol would be better suited for this download job but ftp is |
|
|
|
995 less and less available so I find <strong>wget</strong> to be a nice workaround for this.</p> |
|
|
|
996 |
|
|
|
997 ]]> |
|
|
|
998 </description> |
|
|
|
999 <guid>https://dataswamp.org/~solene/2020-06-16-wget-mirror.html</guid> |
|
|
|
1000 <link>https://dataswamp.org/~solene/2020-06-16-wget-mirror.html</link> |
|
|
|
1001 <pubDate>Tue, 16 Jun 2020 00:00:00 GMT</pubDate> |
|
|
|
1002 </item> |
|
|
|
1003 <item> |
|
|
|
1004 <title>Birthdays dates management using calendar</title> |
|
|
|
1005 <description> |
|
|
|
1006 <![CDATA[ |
|
|
|
1007 <p>I manage my birthday list so I don’t forget about them in a |
|
|
|
1008 <a href="https://man.openbsd.org/calendar.1">calendar</a> file so I can use |
|
|
|
1009 it in scripts</p> |
|
|
|
1010 |
|
|
|
1011 <p>The calendar file format is easy but sadly it only works using |
|
|
|
1012 English month names.</p> |
|
|
|
1013 |
|
|
|
1014 <p>This is an example file with differents spacing:</p> |
|
|
|
1015 |
|
|
|
1016 <pre><code>7 August This is 7 august birthday! |
|
|
|
1017 8 August This is 8 august birthday! |
|
|
|
1018 16 August This is 16 august birthday! |
|
|
|
1019 </code></pre> |
|
|
|
1020 |
|
|
|
1021 <p>Now you have a calendar file you can use the <strong>calendar</strong> binary |
|
|
|
1022 on it and show incoming events in the next n days using -A flag.</p> |
|
|
|
1023 |
|
|
|
1024 <pre><code>calendar -A 20 |
|
|
|
1025 </code></pre> |
|
|
|
1026 |
|
|
|
1027 <p>Note that the default file is <code>~/.calendar/calendar</code> so if you |
|
|
|
1028 use this file you don’t need to use the <code>-f</code> flag in calendar.</p> |
|
|
|
1029 |
|
|
|
1030 <p>Now, I also use it in crontab with xmessage to show a popup once a |
|
|
|
1031 day with incoming birthdays.</p> |
|
|
|
1032 |
|
|
|
1033 <pre><code>30 13 * * * calendar -A 7 -f ~/.calendar/birthday | grep . && calendar -A 7 -f ~/.calendar/birthdays | env DISPLAY=:0 xmessage -file - |
|
|
|
1034 </code></pre> |
|
|
|
1035 |
|
|
|
1036 <p>You have to set the DISPLAY variable so it appear on the screen.</p> |
|
|
|
1037 |
|
|
|
1038 <p>It’s important to check if calendar will have any output before |
|
|
|
1039 calling xmessage to prevent having an empty window.</p> |
|
|
|
1040 |
|
|
|
1041 ]]> |
|
|
|
1042 </description> |
|
|
|
1043 <guid>https://dataswamp.org/~solene/2020-06-15-calendar-xmessage.html</guid> |
|
|
|
1044 <link>https://dataswamp.org/~solene/2020-06-15-calendar-xmessage.html</link> |
|
|
|
1045 <pubDate>Mon, 15 Jun 2020 00:00:00 GMT</pubDate> |
|
|
|
1046 </item> |
|
|
|
1047 <item> |
|
|
|
1048 <title>prose - Blogging with emails</title> |
|
|
|
1049 <description> |
|
|
|
1050 <![CDATA[ |
|
|
|
1051 <p>The software developer prx, his website is available at <a href="https://ybad.name/">https://ybad.name/ |
|
|
|
1052 (en/fr)</a>, released a new software called <strong>prose</strong> to |
|
|
|
1053 publish a blog by sending emails.</p> |
|
|
|
1054 |
|
|
|
1055 <p>I really like this idea, while this doesn’t suit my needs at all, |
|
|
|
1056 I wanted to write about it.</p> |
|
|
|
1057 |
|
|
|
1058 <p>The code can be downloaded from this address https://dev.ybad.name/prose/ .</p> |
|
|
|
1059 |
|
|
|
1060 <p>I will briefly introduce how it works but the README file is well explaining, |
|
|
|
1061 prose must be started from the mail server, upon email receival in |
|
|
|
1062 <code>/etc/mail/aliases</code> the email will be piped into prose which will produce the |
|
|
|
1063 html output.</p> |
|
|
|
1064 |
|
|
|
1065 <p>On the security side, <strong>prose</strong> doesn’t use any external command and on OpenBSD |
|
|
|
1066 it will use unveil and pledge features to reduce privileges of <strong>prose</strong>, |
|
|
|
1067 unveil will restrict the process file system accesses outside of the html |
|
|
|
1068 output directory.</p> |
|
|
|
1069 |
|
|
|
1070 <p>I would also congrats prx who demonstrates again that writing good software |
|
|
|
1071 isn’t exclusive to IT professionnal.</p> |
|
|
|
1072 |
|
|
|
1073 ]]> |
|
|
|
1074 </description> |
|
|
|
1075 <guid>https://dataswamp.org/~solene/2020-06-11-prose.html</guid> |
|
|
|
1076 <link>https://dataswamp.org/~solene/2020-06-11-prose.html</link> |
|
|
|
1077 <pubDate>Thu, 11 Jun 2020 00:00:00 GMT</pubDate> |
|
|
|
1078 </item> |
|
|
|
1079 <item> |
|
|
|
1080 <title>Gaming on OpenBSD</title> |
|
|
|
1081 <description> |
|
|
|
1082 <![CDATA[ |
|
|
|
1083 <p>While no one would expect this, there are huge efforts from a small team to |
|
|
|
1084 bring more games into OpenBSD. In fact, now some commercial games works |
|
|
|
1085 natively now, thanks to Mono or Java. There are no wine or linux emulation |
|
|
|
1086 layer in OpenBSD.</p> |
|
|
|
1087 |
|
|
|
1088 <p>Here is a small list of most well known games that run on OpenBSD:</p> |
|
|
|
1089 |
|
|
|
1090 <ul> |
|
|
|
1091 <li>Northguard (RTS)</li> |
|
|
|
1092 <li>Dead Cells (Side scroller action game)</li> |
|
|
|
1093 <li>Stardew Valley (Farming / Roguelike)</li> |
|
|
|
1094 <li>Slay The Spire (Card / Roguelike)</li> |
|
|
|
1095 <li>Axiom Verge (Side scroller, metroidvania)</li> |
|
|
|
1096 <li>Crosscode (top view twin stick shooter)</li> |
|
|
|
1097 <li>Terraria (Side scroller action game with craft)</li> |
|
|
|
1098 <li>Ion Fury (FPS)</li> |
|
|
|
1099 <li>Doom 3 (FPS)</li> |
|
|
|
1100 <li>Minecraft (Sandbox - not working using latest version)</li> |
|
|
|
1101 <li>Tales Of Maj’Eyal (Roguelike with lot of things in it - open source and free)</li> |
|
|
|
1102 </ul> |
|
|
|
1103 |
|
|
|
1104 <p>I would also like to feature the recently made compatible games from |
|
|
|
1105 Zachtronics developer, those are ingenious puzzles games requiring efficiency. |
|
|
|
1106 There are games involving Assembly code, pseudo code, molecules etc…</p> |
|
|
|
1107 |
|
|
|
1108 <ul> |
|
|
|
1109 <li>Opus Magnum</li> |
|
|
|
1110 <li>Exapunks</li> |
|
|
|
1111 <li>Molek-Syntez</li> |
|
|
|
1112 </ul> |
|
|
|
1113 |
|
|
|
1114 <p>Finally, there are good RPG running thanks to devoted developer spending their |
|
|
|
1115 free time working on game engine reimplementation:</p> |
|
|
|
1116 |
|
|
|
1117 <ul> |
|
|
|
1118 <li>Elder Scroll III: Morrowind (openmw engine)</li> |
|
|
|
1119 <li>Baldur’s Gate 1 and 2 (gemrb engine)</li> |
|
|
|
1120 <li>Planescape: Torment (gemrb engine)</li> |
|
|
|
1121 </ul> |
|
|
|
1122 |
|
|
|
1123 <p>There is a Peertube (opensource decentralized Youtube alternative) channel |
|
|
|
1124 where I started publishing gaming videos recorded from OpenBSD. Now there are |
|
|
|
1125 also videos from others people that are published. <a href="https://videos.pair2jeux.tube/video-channels/openbsd_gaming">OpenBSD Gaming |
|
|
|
1126 channel</a></p> |
|
|
|
1127 |
|
|
|
1128 <p>The full list of running games is available in the <a href="https://playonbsd.com/shopping_guide/">Shopping guide |
|
|
|
1129 webpage</a> including information how they |
|
|
|
1130 run, on which store you can buy them and if they are compatible.</p> |
|
|
|
1131 |
|
|
|
1132 <p>Big thanks to thfr@ who works hard to keep the shopping guide up to date and |
|
|
|
1133 who made most of this possible. Many thanks to all the other people in the |
|
|
|
1134 OpenBSD Gaming community :)</p> |
|
|
|
1135 |
|
|
|
1136 <p>Note that it seems last Terraria release/update doesn’t work on OpenBSD yet.</p> |
|
|
|
1137 |
|
|
|
1138 ]]> |
|
|
|
1139 </description> |
|
|
|
1140 <guid>https://dataswamp.org/~solene/2020-06-05-openbsd-gaming.html</guid> |
|
|
|
1141 <link>https://dataswamp.org/~solene/2020-06-05-openbsd-gaming.html</link> |
|
|
|
1142 <pubDate>Fri, 05 Jun 2020 00:00:00 GMT</pubDate> |
|
|
|
1143 </item> |
|
|
|
1144 <item> |
|
|
|
1145 <title>Beautiful background pictures on OpenBSD</title> |
|
|
|
1146 <description> |
|
|
|
1147 <![CDATA[ |
|
|
|
1148 <p>While the title may appear quite strange, the article is about installing a |
|
|
|
1149 package to have a new random wallpaper everytime you start the X session!</p> |
|
|
|
1150 |
|
|
|
1151 <p>First, you need to install a package named <code>openbsd-backgrounds</code> which is quite |
|
|
|
1152 large with a size of 144 MB. This package made by Marc Espie contains lot of |
|
|
|
1153 pictures shot by some OpenBSD developers.</p> |
|
|
|
1154 |
|
|
|
1155 <p>You can automatically set a picture as a background when xenodm start and |
|
|
|
1156 prompt for your username by uncommenting a few lines in the file |
|
|
|
1157 <code>/etc/X11/xenodm/Xsetup_0</code>:</p> |
|
|
|
1158 |
|
|
|
1159 <p>Uncomment this part</p> |
|
|
|
1160 |
|
|
|
1161 <pre><code>if test -x /usr/local/bin/openbsd-wallpaper |
|
|
|
1162 then |
|
|
|
1163 /usr/local/bin/openbsd-wallpaper |
|
|
|
1164 fi |
|
|
|
1165 </code></pre> |
|
|
|
1166 |
|
|
|
1167 <p>The command <code>openbsd-wallpaper</code> will display a different random picture on |
|
|
|
1168 every screen (if you have multiples screen connected) every time you run it.</p> |
|
|
|
1169 |
|
|
|
1170 ]]> |
|
|
|
1171 </description> |
|
|
|
1172 <guid>https://dataswamp.org/~solene/2020-05-20-wallpapers.html</guid> |
|
|
|
1173 <link>https://dataswamp.org/~solene/2020-05-20-wallpapers.html</link> |
|
|
|
1174 <pubDate>Wed, 20 May 2020 00:00:00 GMT</pubDate> |
|
|
|
1175 </item> |
|
|
|
1176 <item> |
|
|
|
1177 <title>Communauté OpenBSD française</title> |
|
|
|
1178 <description> |
|
|
|
1179 <![CDATA[ |
|
|
|
1180 <p>This article is exceptionnaly in French because it’s about a French OpenBSD |
|
|
|
1181 community.</p> |
|
|
|
1182 |
|
|
|
1183 <p>Bonjour à toutes et à tous.</p> |
|
|
|
1184 |
|
|
|
1185 <p>Exceptionnellement je publie un billet en français sur mon blog car je tiens à |
|
|
|
1186 faire passer le mot concernant la communauté française obsd4a.</p> |
|
|
|
1187 |
|
|
|
1188 <p>Vous pourrez par exemple trouver la quasi intégralité de la FAQ OpenBSD |
|
|
|
1189 traduite <a href="https://wiki.openbsd.fr.eu.org/doku.php/openbsd.org/faq/start">à cette |
|
|
|
1190 adresse</a></p> |
|
|
|
1191 |
|
|
|
1192 <p>Sur l’accueil du site vous pourrez trouver des liens vers le forum, le wiki, le |
|
|
|
1193 blog, la mailing list et aussi les informations pour rejoindre le salon irc |
|
|
|
1194 (#obsd4* sur freenode)</p> |
|
|
|
1195 |
|
|
|
1196 <p><a href="https://openbsd.fr.eu.org/">https://openbsd.fr.eu.org/</a></p> |
|
|
|
1197 |
|
|
|
1198 ]]> |
|
|
|
1199 </description> |
|
|
|
1200 <guid>https://dataswamp.org/~solene/2020-05-17-openbsdfr.html</guid> |
|
|
|
1201 <link>https://dataswamp.org/~solene/2020-05-17-openbsdfr.html</link> |
|
|
|
1202 <pubDate>Sun, 17 May 2020 00:00:00 GMT</pubDate> |
|
|
|
1203 </item> |
|
|
|
1204 <item> |
|
|
|
1205 <title>New blog feature: Fediverse comments</title> |
|
|
|
1206 <description> |
|
|
|
1207 <![CDATA[ |
|
|
|
1208 <p>I added a new feature to my blog today, when I post a new blog article this |
|
|
|
1209 will trigger my dedicated Mastodon user |
|
|
|
1210 <a href="https://bsd.network/@solenepercent">https://bsd.network/@solenepercent</a> to |
|
|
|
1211 publish a Toot so people can discuss the content there.</p> |
|
|
|
1212 |
|
|
|
1213 <p>Every article now contains a link to the toot if you want to discuss about an |
|
|
|
1214 article.</p> |
|
|
|
1215 |
|
|
|
1216 <p>This is not perfect but a good trade-off I think:</p> |
|
|
|
1217 |
|
|
|
1218 <ol> |
|
|
|
1219 <li>the website remains static and light (nothing is included, only one more |
|
|
|
1220 link per blog post)</li> |
|
|
|
1221 <li>people who would like to discuss about it can proceed in a known place |
|
|
|
1222 instead of writing reactions on reddit or other places without a chance for |
|
|
|
1223 me to asnwer</li> |
|
|
|
1224 <li>this is not relying on proprietary services</li> |
|
|
|
1225 </ol> |
|
|
|
1226 |
|
|
|
1227 <p>Of course, if you want to give me feedback, I’m still happy to reply to emails |
|
|
|
1228 or on IRC.</p> |
|
|
|
1229 |
|
|
|
1230 ]]> |
|
|
|
1231 </description> |
|
|
|
1232 <guid>https://dataswamp.org/~solene/2020-05-16-fediverse-comments.html</guid> |
|
|
|
1233 <link>https://dataswamp.org/~solene/2020-05-16-fediverse-comments.html</link> |
|
|
|
1234 <pubDate>Sat, 16 May 2020 00:00:00 GMT</pubDate> |
|
|
|
1235 </item> |
|
|
|
1236 <item> |
|
|
|
1237 <title>FreeBSD 12.1 on a laptop</title> |
|
|
|
1238 <description> |
|
|
|
1239 <![CDATA[ |
|
|
|
1240 <h1 id="introduction">Introduction</h1> |
|
|
|
1241 |
|
|
|
1242 <p>I’m using FreeBSD again on a laptop for some reasons so expect to read more |
|
|
|
1243 about FreeBSD here. This tutorial explain how to get a graphical desktop using |
|
|
|
1244 FreeBSD 12.1.</p> |
|
|
|
1245 |
|
|
|
1246 <p>I used a Lenovo Thinkpad T480 for this tutorial.</p> |
|
|
|
1247 |
|
|
|
1248 <h1 id="intelgraphicshardwaresupport">Intel graphics hardware support</h1> |
|
|
|
1249 |
|
|
|
1250 <p>If you have a recent Intel integrated graphic card (maybe less than 3 years), |
|
|
|
1251 you have to install a package containing the driver:</p> |
|
|
|
1252 |
|
|
|
1253 <pre><code>pkg install drm-kmod |
|
|
|
1254 </code></pre> |
|
|
|
1255 |
|
|
|
1256 <p>and you also have to tell the system the correct path of the module (because |
|
|
|
1257 another i915kms.ko file exist):</p> |
|
|
|
1258 |
|
|
|
1259 <pre><code>sysrc kld_list="/boot/modules/i915kms.ko" |
|
|
|
1260 </code></pre> |
|
|
|
1261 |
|
|
|
1262 <h1 id="chooseyourdesktopenvironnement">Choose your desktop environnement</h1> |
|
|
|
1263 |
|
|
|
1264 <h2 id="installxfce">Install Xfce</h2> |
|
|
|
1265 |
|
|
|
1266 <pre><code>pkg install xfce |
|
|
|
1267 </code></pre> |
|
|
|
1268 |
|
|
|
1269 <p>Then in your user <code>~/.xsession</code> file you must append:</p> |
|
|
|
1270 |
|
|
|
1271 <pre><code>exec ck-launch-session startxfce4 |
|
|
|
1272 </code></pre> |
|
|
|
1273 |
|
|
|
1274 <h2 id="installmate">Install MATE</h2> |
|
|
|
1275 |
|
|
|
1276 <pre><code>pkg install mate |
|
|
|
1277 </code></pre> |
|
|
|
1278 |
|
|
|
1279 <p>Then in your user <code>~/.xsession</code> file you must append:</p> |
|
|
|
1280 |
|
|
|
1281 <pre><code>exec ck-launch-session mate-session |
|
|
|
1282 </code></pre> |
|
|
|
1283 |
|
|
|
1284 <h2 id="installkde5">Install KDE5</h2> |
|
|
|
1285 |
|
|
|
1286 <pre><code>pkg install kde5 |
|
|
|
1287 </code></pre> |
|
|
|
1288 |
|
|
|
1289 <p>Then in your user <code>~/.xsession</code> file you must append:</p> |
|
|
|
1290 |
|
|
|
1291 <pre><code>exec ck-launch-session startplasma-x11 |
|
|
|
1292 </code></pre> |
|
|
|
1293 |
|
|
|
1294 <h1 id="settingupthegraphicalinterface">Setting up the graphical interface</h1> |
|
|
|
1295 |
|
|
|
1296 <p>You have to enable a few services to have a working graphical session:</p> |
|
|
|
1297 |
|
|
|
1298 <ul> |
|
|
|
1299 <li><strong>moused</strong> to get laptop mouse support</li> |
|
|
|
1300 <li><strong>dbus</strong> for hald</li> |
|
|
|
1301 <li><strong>hald</strong> for hardware detection</li> |
|
|
|
1302 <li><strong>xdm</strong> for display manager where you log-in</li> |
|
|
|
1303 </ul> |
|
|
|
1304 |
|
|
|
1305 <p>You can install them with the command:</p> |
|
|
|
1306 |
|
|
|
1307 <pre><code>pkg install xorg dbus hal xdm |
|
|
|
1308 </code></pre> |
|
|
|
1309 |
|
|
|
1310 <p>Then you can enable the services at boot using the following commands, order is |
|
|
|
1311 important:</p> |
|
|
|
1312 |
|
|
|
1313 <pre><code>sysrc moused_enable="yes" |
|
|
|
1314 sysrc dbus_enable="yes" |
|
|
|
1315 sysrc hald_enable="yes" |
|
|
|
1316 sysrc xdm_enable="yes" |
|
|
|
1317 </code></pre> |
|
|
|
1318 |
|
|
|
1319 <p>Reboot or start the services in the same order:</p> |
|
|
|
1320 |
|
|
|
1321 <pre><code>service moused start |
|
|
|
1322 service dbus start |
|
|
|
1323 service hald start |
|
|
|
1324 service xdm start |
|
|
|
1325 </code></pre> |
|
|
|
1326 |
|
|
|
1327 <p><strong>Note that xdm will be in qwerty layout.</strong></p> |
|
|
|
1328 |
|
|
|
1329 <h1 id="powermanagement">Power management</h1> |
|
|
|
1330 |
|
|
|
1331 <p>The installer should have prompted for the service powerd, if you didn’t |
|
|
|
1332 activate it at this time, you can still enable it.</p> |
|
|
|
1333 |
|
|
|
1334 <p>Check if it’s running</p> |
|
|
|
1335 |
|
|
|
1336 <pre><code>service powerd status |
|
|
|
1337 </code></pre> |
|
|
|
1338 |
|
|
|
1339 <p>Enabling</p> |
|
|
|
1340 |
|
|
|
1341 <pre><code>sysrc powerd_enable="yes" |
|
|
|
1342 </code></pre> |
|
|
|
1343 |
|
|
|
1344 <p>Starting the service</p> |
|
|
|
1345 |
|
|
|
1346 <pre><code>service powerd start |
|
|
|
1347 </code></pre> |
|
|
|
1348 |
|
|
|
1349 <h1 id="webcamsupport">Webcam support</h1> |
|
|
|
1350 |
|
|
|
1351 <p>If you have a webcam and want to use it, some configuration is required in |
|
|
|
1352 order to make it work.</p> |
|
|
|
1353 |
|
|
|
1354 <p>Install the package webcamd, it will displays all the instructions written |
|
|
|
1355 below at the install step.</p> |
|
|
|
1356 |
|
|
|
1357 <pre><code>pkg install webcamd |
|
|
|
1358 </code></pre> |
|
|
|
1359 |
|
|
|
1360 <p>From here, append this line to the file <code>/boot/loader.conf</code> to load webcam |
|
|
|
1361 support at boot time:</p> |
|
|
|
1362 |
|
|
|
1363 <pre><code>cuse_load="yes" |
|
|
|
1364 </code></pre> |
|
|
|
1365 |
|
|
|
1366 <p>Add your user to the webcamd group so it will be able to use the device:</p> |
|
|
|
1367 |
|
|
|
1368 <pre><code>pw groupmod webcamd -m YOUR_USER |
|
|
|
1369 </code></pre> |
|
|
|
1370 |
|
|
|
1371 <p>Enable webcamd at boot:</p> |
|
|
|
1372 |
|
|
|
1373 <pre><code>sysrc webcamd_enable="yes" |
|
|
|
1374 </code></pre> |
|
|
|
1375 |
|
|
|
1376 <p>Now, you have to logout from your user for the group change to take place. And |
|
|
|
1377 if you want the webcamd daemon to work now and not wait next reboot:</p> |
|
|
|
1378 |
|
|
|
1379 <pre><code>kldload cuse |
|
|
|
1380 service webcamd start |
|
|
|
1381 service devd restart |
|
|
|
1382 </code></pre> |
|
|
|
1383 |
|
|
|
1384 <p>You should have a /dev/video0 device now. You can test it easily with the |
|
|
|
1385 package <code>pwcview</code>.</p> |
|
|
|
1386 |
|
|
|
1387 <h1 id="externalresources">External resources</h1> |
|
|
|
1388 |
|
|
|
1389 <p>I found this blog very interesting, I wish I found it before I struggle with |
|
|
|
1390 all the configuration as it explains how to install FreeBSD on the exact same |
|
|
|
1391 laptop. The author explains how to make a transparent lagg0 interface for |
|
|
|
1392 switching from ethernet to wifi automatically with a failover pseudo device.</p> |
|
|
|
1393 |
|
|
|
1394 <p><a href="https://genneko.github.io/playing-with-bsd/hardware/freebsd-on-thinkpad-t480/">https://genneko.github.io/playing-with-bsd/hardware/freebsd-on-thinkpad-t480/</a></p> |
|
|
|
1395 |
|
|
|
1396 ]]> |
|
|
|
1397 </description> |
|
|
|
1398 <guid>https://dataswamp.org/~solene/2020-05-11-freebsd-workstation.html</guid> |
|
|
|
1399 <link>https://dataswamp.org/~solene/2020-05-11-freebsd-workstation.html</link> |
|
|
|
1400 <pubDate>Mon, 11 May 2020 00:00:00 GMT</pubDate> |
|
|
|
1401 </item> |
|
|
|
1402 <item> |
|
|
|
1403 <title>Enable firefox dark mode</title> |
|
|
|
1404 <description> |
|
|
|
1405 <![CDATA[ |
|
|
|
1406 <p>Some websites (like this one) now offers two differents themes: light and dark.</p> |
|
|
|
1407 |
|
|
|
1408 <p>Dark themes are proven to be better for the eyes and reduce battery usage on |
|
|
|
1409 mobiles devices because it requires less light to be displayed hence it |
|
|
|
1410 requires less energy to display. The gain is optimal on OLED devices but it |
|
|
|
1411 also works on classic LCD screens.</p> |
|
|
|
1412 |
|
|
|
1413 <p>While on Windows and MacOS there is a global setting for the user interface in |
|
|
|
1414 which you choose if your system is in light or dark mode, with that setting |
|
|
|
1415 being used by lot of applications supporting dark/light themes, on Linux and |
|
|
|
1416 BSDs (and others) operating systems there is no such settings and your web |
|
|
|
1417 browser will keep displaying the light theme all the time.</p> |
|
|
|
1418 |
|
|
|
1419 <p>Hopefully, it can be fixed in firefox as <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme">as explained in the |
|
|
|
1420 documentation</a>.</p> |
|
|
|
1421 |
|
|
|
1422 <p>To make it short, in the about:config special Firefox page, one can create a |
|
|
|
1423 new key <code>ui.systemUsesDarkTheme</code> with a number value of <code>1</code>, the firefox |
|
|
|
1424 about:config page should turn dark immediately and then Firefox will try to use |
|
|
|
1425 dark themes when they are available.</p> |
|
|
|
1426 |
|
|
|
1427 <p>You should note that as explained in the mozilla documentation, if you have the |
|
|
|
1428 key <code>privacy.resistFingerprinting</code> set to <code>true</code> the dark mode can’t be used. |
|
|
|
1429 It seems dark mode and privacy can’t belong together for some reasons.</p> |
|
|
|
1430 |
|
|
|
1431 <p>Many thanks to <a href="https://tilde.zone/@andinus">https://tilde.zone/@andinus</a> who |
|
|
|
1432 pointed me this out after I overlooked that page and searched a long time with |
|
|
|
1433 no result how to make Firefox display website using the dark theme.</p> |
|
|
|
1434 |
|
|
|
1435 ]]> |
|
|
|
1436 </description> |
|
|
|
1437 <guid>https://dataswamp.org/~solene/2020-05-04-firefox-dark.html</guid> |
|
|
|
1438 <link>https://dataswamp.org/~solene/2020-05-04-firefox-dark.html</link> |
|
|
|
1439 <pubDate>Mon, 04 May 2020 00:00:00 GMT</pubDate> |
|
|
|
1440 </item> |
|
|
|
1441 <item> |
|
|
|
1442 <title>Aggregate internet links with mlvpn</title> |
|
|
|
1443 <description> |
|
|
|
1444 <![CDATA[ |
|
|
|
1445 <p>In this article I’ll explain how to aggregate internet access bandwidth using |
|
|
|
1446 <strong>mlvpn</strong> software. I struggled a lot to set this up so I wanted to share a |
|
|
|
1447 how-to.</p> |
|
|
|
1448 |
|
|
|
1449 <h2 id="pre-requisites">Pre-requisites</h2> |
|
|
|
1450 |
|
|
|
1451 <p><strong>mlvpn</strong> is meant to be used with DSL / fiber links, not wireless or 4G links |
|
|
|
1452 with variable bandwidth or packet loss.</p> |
|
|
|
1453 |
|
|
|
1454 <p><strong>mlvpn</strong> requires to be run on a server which will be the public internet |
|
|
|
1455 access and on the client on which you want to aggregate the links, this is like |
|
|
|
1456 doing multiples VPN to the same remote server with a VPN per link, and |
|
|
|
1457 aggregate them.</p> |
|
|
|
1458 |
|
|
|
1459 <p>Multi-wan roundrobin / load balancer doesn’t allow to stack bandwidth but |
|
|
|
1460 doesn’t require a remote server, depend on what you want to do, this may be |
|
|
|
1461 enough and mlvpn may not be required.</p> |
|
|
|
1462 |
|
|
|
1463 <p><strong>mlvpn</strong> should be OS agnostic between client / server but I only tried |
|
|
|
1464 between two OpenBSD hosts, your setup may differ.</p> |
|
|
|
1465 |
|
|
|
1466 <h2 id="somenetworkdiagram">Some network diagram</h2> |
|
|
|
1467 |
|
|
|
1468 <p>Here is a simple network, the client has access to 2 ISP through two ethernet |
|
|
|
1469 interfaces.</p> |
|
|
|
1470 |
|
|
|
1471 <p>em0 and em1 will have to be on different rdomains (it’s a feature to separate |
|
|
|
1472 routing tables).</p> |
|
|
|
1473 |
|
|
|
1474 <p>Let’s say the public ip of the server is 1.2.3.4.</p> |
|
|
|
1475 |
|
|
|
1476 <pre><code> [internet] |
|
|
|
1477 ↑ |
|
|
|
1478 | (public ip on em0) |
|
|
|
1479 #-------------# |
|
|
|
1480 | | |
|
|
|
1481 | Server | |
|
|
|
1482 | | |
|
|
|
1483 #-------------# |
|
|
|
1484 | | |
|
|
|
1485 | | |
|
|
|
1486 | | |
|
|
|
1487 | | |
|
|
|
1488 (internet) | | (internet) |
|
|
|
1489 #-------------# #-------------# |
|
|
|
1490 | | | | |
|
|
|
1491 | ISP 1 | | ISP 2 | |
|
|
|
1492 | | | | (you certainly don't control those) |
|
|
|
1493 #-------------# #-------------# |
|
|
|
1494 | | |
|
|
|
1495 | | |
|
|
|
1496 (dsl1 via em0)| | (dsl1 via em1) |
|
|
|
1497 #-------------# |
|
|
|
1498 | | |
|
|
|
1499 | Client | |
|
|
|
1500 | | |
|
|
|
1501 #-------------# |
|
|
|
1502 </code></pre> |
|
|
|
1503 |
|
|
|
1504 <h2 id="networkconfiguration">Network configuration</h2> |
|
|
|
1505 |
|
|
|
1506 <p>As said previously, em0 and em1 must be on different rdomains, it can easily be |
|
|
|
1507 done by adding <code>rdomain 1</code> and <code>rdomain 2</code> to the interfaces configuration.</p> |
|
|
|
1508 |
|
|
|
1509 <p>Example in <strong>/etc/hostname.em0</strong></p> |
|
|
|
1510 |
|
|
|
1511 <pre><code>rdomain 1 |
|
|
|
1512 dhcp |
|
|
|
1513 </code></pre> |
|
|
|
1514 |
|
|
|
1515 <h2 id="mlvpninstallation">mlvpn installation</h2> |
|
|
|
1516 |
|
|
|
1517 <p>On OpenBSD the installation is as easy as <code>pkg_add mlvpn</code> (should work starting |
|
|
|
1518 from 6.7 because it required patching).</p> |
|
|
|
1519 |
|
|
|
1520 <h2 id="mlvpnconfiguration">mlvpn configuration</h2> |
|
|
|
1521 |
|
|
|
1522 <p>Once the network configuration is done on the client, there are 3 steps to do |
|
|
|
1523 to get aggregation working:</p> |
|
|
|
1524 |
|
|
|
1525 <ol> |
|
|
|
1526 <li>mlvpn configuration on the server</li> |
|
|
|
1527 <li>mlvpn configuration on the client</li> |
|
|
|
1528 <li>activating NAT on the client</li> |
|
|
|
1529 </ol> |
|
|
|
1530 |
|
|
|
1531 <h3 id="serverconfiguration">Server configuration</h3> |
|
|
|
1532 |
|
|
|
1533 <p>On the server we will use the UDP ports 5080 et 5081.</p> |
|
|
|
1534 |
|
|
|
1535 <p>Connections speed must be defined in bytes to allow <strong>mlvpn</strong> to correctly |
|
|
|
1536 balance the traffic over the links, this is really important.</p> |
|
|
|
1537 |
|
|
|
1538 <p>The line <code>bandwidth_upload = 1468006</code> is the maximum <strong>download bandwidth of the |
|
|
|
1539 client</strong> on the specified link in bytes. If you have a download speed of 1.4 MB/s |
|
|
|
1540 then you can choose a value of 1.4*1024*1024 => 1468006.</p> |
|
|
|
1541 |
|
|
|
1542 <p>The line <code>bandwidth_download = 102400</code> is the maximum <strong>upload bandwidth of the |
|
|
|
1543 client</strong> on the specified link in bytes. If you have an upload speed of 100 kB/s |
|
|
|
1544 then you can choose a value of 100*1024 => 102400.</p> |
|
|
|
1545 |
|
|
|
1546 <p>The <strong>password</strong> line must be a very long random string, it’s a shared secret |
|
|
|
1547 between the client and the server.</p> |
|
|
|
1548 |
|
|
|
1549 <pre><code># config you don't need to change |
|
|
|
1550 [general] |
|
|
|
1551 statuscommand = "/etc/mlvpn/mlvpn_updown.sh" |
|
|
|
1552 protocol = "tcp" |
|
|
|
1553 loglevel = 4 |
|
|
|
1554 mode = "server" |
|
|
|
1555 tuntap = "tun" |
|
|
|
1556 interface_name = "tun0" |
|
|
|
1557 cleartext_data = 0 |
|
|
|
1558 ip4 = "10.44.43.2/30" |
|
|
|
1559 ip4_gateway = "10.44.43.1" |
|
|
|
1560 |
|
|
|
1561 # things you need to change |
|
|
|
1562 password = "apoziecxjvpoxkvpzeoirjdskpoezroizepzdlpojfoiezjrzanzaoinzoi" |
|
|
|
1563 |
|
|
|
1564 [dsl1] |
|
|
|
1565 bindhost = "1.2.3.4" |
|
|
|
1566 bindport = 5080 |
|
|
|
1567 bandwidth_upload = 1468006 |
|
|
|
1568 bandwidth_download = 102400 |
|
|
|
1569 |
|
|
|
1570 [dsl2] |
|
|
|
1571 bindhost = "1.2.3.4" |
|
|
|
1572 bindport = 5081 |
|
|
|
1573 bandwidth_upload = 1468006 |
|
|
|
1574 bandwidth_download = 102400 |
|
|
|
1575 </code></pre> |
|
|
|
1576 |
|
|
|
1577 <h3 id="clientconfiguration">Client configuration</h3> |
|
|
|
1578 |
|
|
|
1579 <p>The <code>password</code> value must match the one on the server, the values of <code>ip4</code> and |
|
|
|
1580 <code>ip4_gateway</code> must be reversed compared to the server configuration (this is so |
|
|
|
1581 in the following example).</p> |
|
|
|
1582 |
|
|
|
1583 <p>The <code>bindfib</code> lines must correspond to the according rdomain values of your |
|
|
|
1584 interfaces.</p> |
|
|
|
1585 |
|
|
|
1586 <pre><code># config you don't need to change |
|
|
|
1587 [general] |
|
|
|
1588 statuscommand = "/etc/mlvpn/mlvpn_updown.sh" |
|
|
|
1589 loglevel = 4 |
|
|
|
1590 mode = "client" |
|
|
|
1591 tuntap = "tun" |
|
|
|
1592 interface_name = "tun0" |
|
|
|
1593 ip4 = "10.44.43.1/30" |
|
|
|
1594 ip4_gateway = "10.44.43.2" |
|
|
|
1595 timeout = 30 |
|
|
|
1596 cleartext_data = 0 |
|
|
|
1597 |
|
|
|
1598 password = "apoziecxjvpoxkvpzeoirjdskpoezroizepzdlpojfoiezjrzanzaoinzoi" |
|
|
|
1599 |
|
|
|
1600 [dsl1] |
|
|
|
1601 remotehost = "1.2.3.4" |
|
|
|
1602 remoteport = 5080 |
|
|
|
1603 bindfib = 1 |
|
|
|
1604 |
|
|
|
1605 [dsl2] |
|
|
|
1606 remotehost = "1.2.3.4" |
|
|
|
1607 remoteport = 5081 |
|
|
|
1608 bindfib = 2 |
|
|
|
1609 </code></pre> |
|
|
|
1610 |
|
|
|
1611 <h3 id="natconfigurationserverside">NAT configuration (server side)</h3> |
|
|
|
1612 |
|
|
|
1613 <p>As with every VPN you must enable packet forwarding and create a pf rule for |
|
|
|
1614 the NAT.</p> |
|
|
|
1615 |
|
|
|
1616 <p><strong>Enable forwarding</strong></p> |
|
|
|
1617 |
|
|
|
1618 <p>Add this line in <strong>/etc/sysctl.conf</strong>:</p> |
|
|
|
1619 |
|
|
|
1620 <pre><code>net.inet.ip.forwarding=1 |
|
|
|
1621 </code></pre> |
|
|
|
1622 |
|
|
|
1623 <p>You can enable it now with <code>sysctl net.inet.ip.forwarding=1</code> instead of waiting |
|
|
|
1624 for a reboot.</p> |
|
|
|
1625 |
|
|
|
1626 <p>In pf.conf you must allow the UDP ports 5080 and 5081 on the public interface |
|
|
|
1627 and enable nat, this can be done with the following lines in pf.conf but you |
|
|
|
1628 should obviously adapt to your configuration.</p> |
|
|
|
1629 |
|
|
|
1630 <pre><code># allow NAT on VPN |
|
|
|
1631 pass in on tun0 |
|
|
|
1632 pass out quick on em0 from 10.44.43.0/30 to any nat-to em0 |
|
|
|
1633 |
|
|
|
1634 # allow mlvpn to be reachable |
|
|
|
1635 pass in on egress inet proto udp from any to (egress) port 5080:5081 |
|
|
|
1636 </code></pre> |
|
|
|
1637 |
|
|
|
1638 <h2 id="startmlvpn">Start mlvpn</h2> |
|
|
|
1639 |
|
|
|
1640 <p>On both server and client you can run mlvpn with rcctl:</p> |
|
|
|
1641 |
|
|
|
1642 <pre><code>rcctl enable mlvpn |
|
|
|
1643 rcctl start mlvpn |
|
|
|
1644 </code></pre> |
|
|
|
1645 |
|
|
|
1646 <p>You should see a new tun0 device on both systems and being able to ping them |
|
|
|
1647 through tun0.</p> |
|
|
|
1648 |
|
|
|
1649 <p>Now, on the client <strong>you have to add a default gateway through the mlvpn |
|
|
|
1650 tunnel</strong> with the command <code>route add -net default 10.44.43.2</code> (adapt if you |
|
|
|
1651 use others addresses). I still didn’t find how to automatize it properly.</p> |
|
|
|
1652 |
|
|
|
1653 <p>Your client should now use both WAN links and being visible with the remote |
|
|
|
1654 server public IP address.</p> |
|
|
|
1655 |
|
|
|
1656 <p><strong>mlvpn</strong> can be used for more links, you only need to add new sections. |
|
|
|
1657 <strong>mlvpn</strong> also support IPv6 but I didn’t take time to find how to make it work, |
|
|
|
1658 si if you are comfortable with ipv6 it may be easy to set up IPv6 with the |
|
|
|
1659 variables <code>ip6</code> and <code>ip6_gateway</code> in mlvpn.conf.</p> |
|
|
|
1660 |
|
|
|
1661 ]]> |
|
|
|
1662 </description> |
|
|
|
1663 <guid>https://dataswamp.org/~solene/2020-03-28-mlvpn.html</guid> |
|
|
|
1664 <link>https://dataswamp.org/~solene/2020-03-28-mlvpn.html</link> |
|
|
|
1665 <pubDate>Sat, 28 Mar 2020 00:00:00 GMT</pubDate> |
|
|
|
1666 </item> |
|
|
|
1667 <item> |
|
|
|
1668 <title>OpenBSD -current - Frequent asked questions</title> |
|
|
|
1669 <description> |
|
|
|
1670 <![CDATA[ |
|
|
|
1671 <p>Hello, as there are so many questions about OpenBSD -current on IRC, Mastodon |
|
|
|
1672 or reddit I’m writing this FAQ in hope it will help people.</p> |
|
|
|
1673 |
|
|
|
1674 <p>The official FAQ already contains answers about -current like <a href="https://www.openbsd.org/faq/current.html">Following |
|
|
|
1675 -current and using snapshots</a> and |
|
|
|
1676 <a href="https://www.openbsd.org/faq/faq5.html#Flavors">Building the system from |
|
|
|
1677 sources</a>.</p> |
|
|
|
1678 |
|
|
|
1679 <h2 id="whatisopenbsd-current">What is OpenBSD -current?</h2> |
|
|
|
1680 |
|
|
|
1681 <p>OpenBSD -current is the development version of OpenBSD. Lot of people use it |
|
|
|
1682 for everyday tasks.</p> |
|
|
|
1683 |
|
|
|
1684 <h2 id="howtoinstallopenbsd-current">How to install OpenBSD -current?</h2> |
|
|
|
1685 |
|
|
|
1686 <p>OpenBSD -current refers to the last version built from sources obtained with |
|
|
|
1687 CVS, however, it’s also possible to get a pre-built system (a snapshot) usually |
|
|
|
1688 built and pushed on mirrors every 1 or 2 days.</p> |
|
|
|
1689 |
|
|
|
1690 <p>You can install OpenBSD -current by getting an installation media like usual, |
|
|
|
1691 but on the path /pub/OpenBSD/snapshots/ on the mirror.</p> |
|
|
|
1692 |
|
|
|
1693 <h2 id="howdoiupgradefrom-releaseto-current">How do I upgrade from -release to -current?</h2> |
|
|
|
1694 |
|
|
|
1695 <p>There are two ways to do so:</p> |
|
|
|
1696 |
|
|
|
1697 <ol> |
|
|
|
1698 <li>Download bsd.rd file from the snapshots directory and boot it to upgrade |
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1699 like for a -release to -release upgrade</li> |
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1700 <li>Run <code>sysupgrade -s</code> command as root, this will basically download all sets |
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1701 under <code>/home/_sysupgrade</code> and boot on bsd.rd with an <code>autoinstall(8)</code> |
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1702 config.</li> |
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1703 </ol> |
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1704 |
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1705 <h2 id="howdoiupgrademy-currentsnapshottoanewersnapshot">How do I upgrade my -current snapshot to a newer snapshot?</h2> |
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1706 |
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1707 <p>Exactly the same process as going from -release to -current.</p> |
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1708 |
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1709 <h2 id="canidowngradetoa-releaseifiswitchto-current">Can I downgrade to a -release if I switch to -current?</h2> |
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1710 |
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1711 <p>No.</p> |
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1712 |
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1713 <h2 id="whatissuescaniexpectinopenbsd-current">What issues can I expect in OpenBSD -current?</h2> |
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1714 |
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1715 <p>There are a few issues possibles that one can expect</p> |
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1716 |
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1717 <h3 id="outofsyncpackages">Out of sync packages</h3> |
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1718 |
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1719 <p>If a library get updated into the base system and you want to update packages, |
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1720 they won’t be installable until packages are rebuilt with that new library, |
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1721 this usually takes 1 up to 3 days.</p> |
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1722 |
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1723 <p><strong>This only create issues in case you want to install a package you don’t have.</strong></p> |
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1724 |
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1725 <p>The other way around, you can have an old snapshot and packages are not |
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1726 installable because the libraries linked to by the packages are newer than what |
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1727 is available in your system, in this case you have to upgrade snapshot. </p> |
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1728 |
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1729 <h3 id="snapshotssetsaregettingupdatedonthemirror">Snapshots sets are getting updated on the mirror</h3> |
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1730 |
|
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1731 <p>If you download the sets on the mirror to update your -current version, you may |
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1732 have an issue with the sha256 sum, this is because the mirror is getting |
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1733 updated and the sha256 file is the first to be transferred, so sets you are |
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1734 downloading are not the one the sha256 will compare.</p> |
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1735 |
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1736 <h3 id="unexpectedsystembreakage">Unexpected system breakage</h3> |
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1737 |
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1738 <p>Sometimes, very rarely (maybe 2 or 3 time in a year?), some snapshots are |
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1739 borked and will prevent system to boot or lead to regularly crashes. In that |
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1740 case, it’s important to report the issue with the <code>sendbug</code> utility.</p> |
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1741 |
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1742 <p>You can fix this by using an older snapshot from <a href="http://ftp.hostserver.de/archive/">this archives |
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1743 server</a> and prevent this to happen by |
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1744 reading bugs@ mailing list before updating.</p> |
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1745 |
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1746 <h3 id="brokenpackage">Broken package</h3> |
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1747 |
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1748 <p>Sometimes, a package update will break it or break some others packages, this |
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1749 is often quickly fixed on popular packages but in some niche packages you may |
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1750 be the only one using it on -current and the only one who can report about it.</p> |
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1751 |
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1752 <p>If you find breakage on something you use, it may be a good idea to report the |
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1753 problem on ports@openbsd.org mailing list if nobody did before. By doing so, |
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1754 the issue will be fixed and next -release users will be able to install a |
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1755 working package.</p> |
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1756 |
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1757 <h2 id="is-currentstableenoughforaserveroraworkstation">Is -current stable enough for a server or a workstation?</h2> |
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1758 |
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1759 <p>It’s really up to you. Developers are all using -current and are forbidden to |
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1760 break it, so the system should totally be usable for everyday use.</p> |
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1761 |
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1762 <p>What may be complicated on a server is keep updating it regularly and face |
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1763 issues requires troubleshooting (like major database upgrade which was missing |
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1764 a quirk).</p> |
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1765 |
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1766 <p>For a workstation I think it’s pretty safe as long as you can deal with |
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1767 packages that can’t be installed until they are in sync.</p> |
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1768 |
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1769 ]]> |
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1770 </description> |
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|
1771 <guid>https://dataswamp.org/~solene/2020-03-27-openbsd-current.html</guid> |
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1772 <link>https://dataswamp.org/~solene/2020-03-27-openbsd-current.html</link> |
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1773 <pubDate>Fri, 27 Mar 2020 00:00:00 GMT</pubDate> |
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1774 </item> |
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1775 |
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1776 </channel> |
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1777 </rss> |
|