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  13  <h1>
  14      <a href="https://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  15
  16  </h1>
  17
  18 </div>
  19
  20
  21     <h3>Entries tagged "linuxcnc".</h3>
  22
  23     <div class="entry">
  24       <div class="title">
  25         <a href="https://people.skolelinux.org/pere/blog/The_2023_LinuxCNC_Norwegian_developer_gathering.html">The 2023 LinuxCNC Norwegian developer gathering</a>
  26       </div>
  27       <div class="date">
  28         14th May 2023
  29       </div>
  30       <div class="body">
  31         <p>The LinuxCNC project is making headway these days.  A lot of
  32 patches and issues have seen activity on
  33 <a href="https://github.com/LinuxCNC/linuxcnc/">the project github
  34 pages</a> recently.  A few weeks ago there was a developer gathering
  35 over at the <a href="https://tormach.com/">Tormach</a> headquarter in
  36 Wisconsin, and now we are planning a new gathering in Norway.  If you
  37 wonder what LinuxCNC is, lets quote Wikipedia:</p>
  38
  39 <blockquote>
  40 "LinuxCNC is a software system for numerical control of
  41 machines such as milling machines, lathes, plasma cutters, routers,
  42 cutting machines, robots and hexapods. It can control up to 9 axes or
  43 joints of a CNC machine using G-code (RS-274NGC) as input. It has
  44 several GUIs suited to specific kinds of usage (touch screen,
  45 interactive development)."
  46 </blockquote>
  47
  48 <p>The Norwegian developer gathering take place the weekend June 16th
  49 to 18th this year, and is open for everyone interested in contributing
  50 to LinuxCNC.  Up to date information about the gathering can be found
  51 in
  52 <a href="https://sourceforge.net/p/emc/mailman/emc-developers/thread/sa64jp06nob.fsf%40hjemme.reinholdtsen.name/#msg37837251">the
  53 developer mailing list thread</a> where the gathering was announced.
  54 Thanks to the good people at
  55 <a href="https://www.debian.org/">Debian</a>,
  56 <a href="https://www.redpill-linpro.com/">Redpill-Linpro</a> and
  57 <a href="https://www.nuugfoundation.no/no/">NUUG Foundation</a>, we
  58 have enough sponsor funds to pay for food, and shelter for the people
  59 traveling from afar to join us.  If you would like to join the
  60 gathering, get in touch.</p>
  61
  62 <p>As usual, if you use Bitcoin and want to show your support of my
  63 activities, please send Bitcoin donations to my address
  64 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  65
  66       </div>
  67       <div class="tags">
  68
  69
  70         Tags: <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc</a>.
  71
  72
  73       </div>
  74     </div>
  75     <div class="padding"></div>
  76
  77     <div class="entry">
  78       <div class="title">
  79         <a href="https://people.skolelinux.org/pere/blog/LinuxCNC_MQTT_publisher_component.html">LinuxCNC MQTT publisher component</a>
  80       </div>
  81       <div class="date">
  82          8th January 2023
  83       </div>
  84       <div class="body">
  85         <p>I watched <a href="https://yewtu.be/watch?v=jmKUV3aNLjk">a 2015
  86 video from Andreas Schiffler</a> the other day, where he set up
  87 <a href="https://linuxcnc.org/">LinuxCNC</a> to send status
  88 information to the MQTT broker IBM Bluemix.  As I also use MQTT for
  89 graphing, it occured to me that a generic MQTT LinuxCNC component
  90 would be useful and I set out to implement it.  Today I got the first
  91 draft limping along and submitted as
  92 <a href="https://github.com/LinuxCNC/linuxcnc/pull/2253">a patch to the
  93 LinuxCNC project</a>.</p>
  94
  95 <p>The simple part was setting up the MQTT publishing code in Python.
  96 I already have set up other parts submitting data to my Mosquito MQTT
  97 broker, so I could reuse that code.  Writing a LinuxCNC component in
  98 Python as new to me, but using existing examples in the code
  99 repository and the extensive documentation, this was fairly straight
 100 forward.  The hardest part was creating a automated test for the
 101 component to ensure it was working.  Testing it in a simulated
 102 LinuxCNC machine proved very useful, as I discovered features I needed
 103 that I had not thought of yet, and adjusted the code quite a bit to
 104 make it easier to test without a operational MQTT broker
 105 available.</p>
 106
 107 <p>The draft is ready and working, but I am unsure which LinuxCNC HAL
 108 pins I should collect and publish by default (in other words, the
 109 default set of information pieces published), and how to get the
 110 machine name from the LinuxCNC INI file.  The latter is a minor
 111 detail, but I expect it would be useful in a setup with several
 112 machines available.  I am hoping for feedback from the experienced
 113 LinuxCNC developers and users, to make the component even better
 114 before it can go into the mainland LinuxCNC code base.</p>
 115
 116 <p>Since I started on the MQTT component, I came across
 117 <a href="https://yewtu.be/watch?v=Bqa2grG0XtA">another video from Kent
 118 VanderVelden</a> where he combine LinuxCNC with a set of screen glasses
 119 controlled by a Raspberry Pi, and it occured to me that it would
 120 be useful for such use cases if LinuxCNC also provided a REST API for
 121 querying its status.  I hope to start on such component once the MQTT
 122 component is working well.</p>
 123
 124 <p>As usual, if you use Bitcoin and want to show your support of my
 125 activities, please send Bitcoin donations to my address
 126 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 127
 128       </div>
 129       <div class="tags">
 130
 131
 132         Tags: <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc</a>, <a href="https://people.skolelinux.org/pere/blog/tags/robot">robot</a>.
 133
 134
 135       </div>
 136     </div>
 137     <div class="padding"></div>
 138
 139     <div class="entry">
 140       <div class="title">
 141         <a href="https://people.skolelinux.org/pere/blog/Automatic_LinuxCNC_servo_PID_tuning_.html">Automatic LinuxCNC servo PID tuning?</a>
 142       </div>
 143       <div class="date">
 144         16th July 2022
 145       </div>
 146       <div class="body">
 147         <p>While working on a CNC with servo motors controlled by the
 148 <a href="https://en.wikipedia.org/wiki/LinuxCNC">LinuxCNC</a>
 149 <a href="https://en.wikipedia.org/wiki/PID_controller">PID
 150 controller</a>, I recently had to learn how to tune the collection of values
 151 that control such mathematical machinery that a PID controller is.  It
 152 proved to be a lot harder than I hoped, and I still have not succeeded
 153 in getting the Z PID controller to successfully defy gravity, nor X
 154 and Y to move accurately and reliably.  But while climbing up this
 155 rather steep learning curve, I discovered that some motor control
 156 systems are able to tune their PID controllers.  I got the impression
 157 from the documentation that LinuxCNC were not.  This proved to be not
 158 true.</p>
 159
 160 <p>The LinuxCNC
 161 <a href="http://linuxcnc.org/docs/html/man/man9/pid.9.html">pid
 162 component</a> is the recommended PID controller to use.  It uses eight
 163 constants <tt>Pgain</tt>, <tt>Igain</tt>, <tt>Dgain</tt>,
 164 <tt>bias</tt>, <tt>FF0</tt>, <tt>FF1</tt>, <tt>FF2</tt> and
 165 <tt>FF3</tt> to calculate the output value based on current and wanted
 166 state, and all of these need to have a sensible value for the
 167 controller to behave properly.  Note, there are even more values
 168 involved, theser are just the most important ones.  In my case I need
 169 the X, Y and Z axes to follow the requested path with little error.
 170 This has proved quite a challenge for someone who have never tuned a
 171 PID controller before, but there is at least some help to be found.
 172
 173 <p>I discovered that included in LinuxCNC was this old PID component
 174 at_pid claiming to have auto tuning capabilities.  Sadly it had been
 175 neglected since 2011, and could not be used as a plug in replacement
 176 for the default pid component.  One would have to rewriting the
 177 LinuxCNC HAL setup to test at_pid.  This was rather sad, when I wanted
 178 to quickly test auto tuning to see if it did a better job than me at
 179 figuring out good P, I and D values to use.</p>
 180
 181 <p>I decided to have a look if the situation could be improved.  This
 182 involved trying to understand the code and history of the pid and
 183 at_pid components.  Apparently they had a common ancestor, as code
 184 structure, comments and variable names were quite close to each other.
 185 Sadly this was not reflected in the git history, making it hard to
 186 figure out what really happened.  My guess is that the author of
 187 <a href="https://github.com/LinuxCNC/linuxcnc/blob/master/src/hal/components/at_pid.c">at_pid.c</a>
 188 took a version of
 189 <a href="https://github.com/LinuxCNC/linuxcnc/blob/master/src/hal/components/pid.c">pid.c</a>,
 190 rewrote it to follow the structure he wished pid.c to have, then added
 191 support for auto tuning and finally got it included into the LinuxCNC
 192 repository.  The restructuring and lack of early history made it
 193 harder to figure out which part of the code were relevant to the auto
 194 tuning, and which part of the code needed to be updated to work the
 195 same way as the current pid.c implementation.  I started by trying to
 196 isolate relevant changes in pid.c, and applying them to at_pid.c.  My
 197 aim was to make sure the at_pid component could replace the pid
 198 component with a simple change in the HAL setup loadrt line, without
 199 having to "rewire" the rest of the HAL configuration.  After a few
 200 hours following this approach, I had learned quite a lot about the
 201 code structure of both components, while concluding I was heading down
 202 the wrong rabbit hole, and should get back to the surface and find a
 203 different path.</p>
 204
 205 <p>For the second attempt, I decided to throw away all the PID control
 206 related part of the original at_pid.c, and instead isolate and lift
 207 the auto tuning part of the code and inject it into a copy of pid.c.
 208 This ensured compatibility with the current pid component, while
 209 adding auto tuning as a run time option.  To make it easier to identify
 210 the relevant parts in the future, I wrapped all the auto tuning code
 211 with '#ifdef AUTO_TUNER'.  The end result behave just like the current
 212 pid component by default, as that part of the code is identical.  The
 213 <a href="https://github.com/LinuxCNC/linuxcnc/pull/1820">end result
 214 entered the LinuxCNC master branch</a> a few days ago.</p>
 215
 216 <p>To enable auto tuning, one need to set a few HAL pins in the PID
 217 component.  The most important ones are <tt>tune-effort</tt>,
 218 <tt>tune-mode</tt> and <tt>tune-start</tt>.  But lets take a step
 219 back, and see what the auto tuning code will do.  I do not know the
 220 mathematical foundation of the at_pid algorithm, but from observation
 221 I can tell that the algorithm will, when enabled, produce a square
 222 wave pattern centered around the <tt>bias</tt> value on the output pin
 223 of the PID controller.  This can be seen using the HAL Scope provided
 224 by LinuxCNC.  In my case, this is translated into voltage (+-10V) sent
 225 to the motor controller, which in turn is translated into motor speed.
 226 So at_pid will ask the motor to move the axis back and forth.  The
 227 number of cycles in the pattern is controlled by the
 228 <tt>tune-cycles</tt> pin, and the extremes of the wave pattern is
 229 controlled by the <tt>tune-effort</tt> pin.  Of course, trying to
 230 change the direction of a physical object instantly (as in going
 231 directly from a positive voltage to the equivalent negative voltage)
 232 do not change velocity instantly, and it take some time for the object
 233 to slow down and move in the opposite direction.  This result in a
 234 more smooth movement wave form, as the axis in question were vibrating
 235 back and forth.  When the axis reached the target speed in the
 236 opposing direction, the auto tuner change direction again.  After
 237 several of these changes, the average time delay between the 'peaks'
 238 and 'valleys' of this movement graph is then used to calculate
 239 proposed values for Pgain, Igain and Dgain, and insert them into the
 240 HAL model to use by the pid controller.  The auto tuned settings are
 241 not great, but htye work a lot better than the values I had been able
 242 to cook up on my own, at least for the horizontal X and Y axis.  But I
 243 had to use very small <tt>tune-effort<tt> values, as my motor
 244 controllers error out if the voltage change too quickly.  I've been
 245 less lucky with the Z axis, which is moving a heavy object up and
 246 down, and seem to confuse the algorithm.  The Z axis movement became a
 247 lot better when I introduced a <tt>bias</tt> value to counter the
 248 gravitational drag, but I will have to work a lot more on the Z axis
 249 PID values.</p>
 250
 251 <p>Armed with this knowledge, it is time to look at how to do the
 252 tuning.  Lets say the HAL configuration in question load the PID
 253 component for X, Y and Z like this:</p>
 254
 255 <blockquote><pre>
 256 loadrt pid names=pid.x,pid.y,pid.z
 257 </pre></blockquote>
 258
 259 <p>Armed with the new and improved at_pid component, the new line will
 260 look like this:</p>
 261
 262 <blockquote><pre>
 263 loadrt at_pid names=pid.x,pid.y,pid.z
 264 </pre></blockquote>
 265
 266 <p>The rest of the HAL setup can stay the same.  This work because the
 267 components are referenced by name.  If the component had used count=3
 268 instead, all use of pid.# had to be changed to at_pid.#.</p>
 269
 270 <p>To start tuning the X axis, move the axis to the middle of its
 271 range, to make sure it do not hit anything when it start moving back
 272 and forth.  Next, set the <tt>tune-effort</tt> to a low number in the
 273 output range.  I used 0.1 as my initial value.  Next, assign 1 to the
 274 <tt>tune-mode</tt> value. Note, this will disable the pid controlling
 275 part and feed 0 to the output pin, which in my case initially caused a
 276 lot of drift.  In my case it proved to be a good idea with X and Y to
 277 tune the motor driver to make sure 0 voltage stopped the motor
 278 rotation.  On the other hand, for the Z axis this proved to be a bad
 279 idea, so it will depend on your setup.  It might help to set the
 280 <tt>bias</tt> value to a output value that reduce or eliminate the
 281 axis drift.  Finally, after setting <tt>tune-mode</tt>, set
 282 <tt>tune-start</tt> to 1 to activate the auto tuning.  If all go well,
 283 your axis will vibrate for a few seconds and when it is done, new
 284 values for Pgain, Igain and Dgain will be active.  To test them,
 285 change <tt>tune-mode</tt> back to 0.  Note that this might cause the
 286 machine to suddenly jerk as it bring the axis back to its commanded
 287 position, which it might have drifted away from during tuning.  To
 288 summarize with some halcmd lines:</p>
 289
 290 <blockquote><pre>
 291 setp pid.x.tune-effort 0.1
 292 setp pid.x.tune-mode 1
 293 setp pid.x.tune-start 1
 294 # wait for the tuning to complete
 295 setp pid.x.tune-mode 0
 296 </pre></blockquote>
 297
 298 <p>After doing this task quite a few times while trying to figure out
 299 how to properly tune the PID controllers on the machine in, I decided
 300 to figure out if this process could be automated, and wrote a script
 301 to do the entire tuning process from power on.  The end result will
 302 ensure the machine is powered on and ready to run, home all axis if it
 303 is not already done, check that the extra tuning pins are available,
 304 move the axis to its mid point, run the auto tuning and re-enable the
 305 pid controller when it is done.  It can be run several times.  Check
 306 out the
 307 <a href="https://github.com/SebKuzminsky/MazakVQC1540/blob/bon-dev/scripts/run-auto-pid-tuner">run-auto-pid-tuner</a>
 308 script on github if you want to learn how it is done.</p>
 309
 310 <p>My hope is that this little adventure can inspire someone who know
 311 more about motor PID controller tuning can implement even better
 312 algorithms for automatic PID tuning in LinuxCNC, making life easier
 313 for both me and all the others that want to use LinuxCNC but lack the
 314 in depth knowledge needed to tune PID controllers well.</p>
 315
 316 <p>As usual, if you use Bitcoin and want to show your support of my
 317 activities, please send Bitcoin donations to my address
 318 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 319
 320       </div>
 321       <div class="tags">
 322
 323
 324         Tags: <a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc</a>, <a href="https://people.skolelinux.org/pere/blog/tags/robot">robot</a>.
 325
 326
 327       </div>
 328     </div>
 329     <div class="padding"></div>
 330
 331     <div class="entry">
 332       <div class="title">
 333         <a href="https://people.skolelinux.org/pere/blog/LinuxCNC_translators_life_just_got_a_bit_easier.html">LinuxCNC translators life just got a bit easier</a>
 334       </div>
 335       <div class="date">
 336          3rd June 2022
 337       </div>
 338       <div class="body">
 339         <p>Back in oktober last year, when I started looking at the
 340 <a href="https://en.wikipedia.org/wiki/LinuxCNC">LinuxCNC</a> system, I
 341 proposed to change the documentation build system make life easier for
 342 translators.  The original system consisted of independently written
 343 documentation files for each language, with no automated way to track
 344 changes done in other translations and no help for the translators to
 345 know how much was left to translated.  By using
 346 <a href="https://po4a.org/">the po4a system</a> to generate POT and PO
 347 files from the English documentation, this can be improved.  A small
 348 team of LinuxCNC contributors got together and today our labour
 349 finally payed off.  Since a few hours ago, it is now possible to
 350 translate <a href="https://hosted.weblate.org/projects/linuxcnc/">the
 351 LinuxCNC documentation on Weblate</a>, alongside the program itself.</p>
 352
 353 <p>The effort to migrate the documentation to use po4a has been both
 354 slow and frustrating.  I am very happy we finally made it.</p>
 355
 356 <p>As usual, if you use Bitcoin and want to show your support of my
 357 activities, please send Bitcoin donations to my address
 358 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 359
 360       </div>
 361       <div class="tags">
 362
 363
 364         Tags: <a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc</a>, <a href="https://people.skolelinux.org/pere/blog/tags/robot">robot</a>.
 365
 366
 367       </div>
 368     </div>
 369     <div class="padding"></div>
 370
 371     <div class="entry">
 372       <div class="title">
 373         <a href="https://people.skolelinux.org/pere/blog/Run_your_industrial_metal_working_machine_using_Debian_.html">Run your industrial metal working machine using Debian?</a>
 374       </div>
 375       <div class="date">
 376          2nd March 2022
 377       </div>
 378       <div class="body">
 379         <p>After many months of hard work by the good people involved in
 380 <a href="https://en.wikipedia.org/wiki/LinuxCNC">LinuxCNC</a>, the
 381 system was accepted Sunday
 382 <a href="https://tracker.debian.org/pkg/linuxcnc">into Debian</a>.
 383 Once it was available from Debian, I was surprised to discover from
 384 <a href="https://qa.debian.org/popcon.php?package=linuxcnc">its
 385 popularity-contest numbers</a> that people have been reporting its use
 386 since 2012.  <a href="http://linuxcnc.org/">Its project site</a> might
 387 be a good place to check out, but sadly is not working when visiting
 388 via Tor.</p>
 389
 390 <p>But what is LinuxCNC, you are probably wondering?  Perhaps a
 391 Wikipedia quote is in place?</p>
 392
 393 <blockquote>
 394 "LinuxCNC is a software system for numerical control of
 395 machines such as milling machines, lathes, plasma cutters, routers,
 396 cutting machines, robots and hexapods. It can control up to 9 axes or
 397 joints of a CNC machine using G-code (RS-274NGC) as input. It has
 398 several GUIs suited to specific kinds of usage (touch screen,
 399 interactive development)."
 400 </blockquote>
 401
 402 <p>It can even control 3D printers.  And even though the Wikipedia
 403 page indicate that it can only work with hard real time kernel
 404 features, it can also work with the user space soft real time features
 405 provided by the Debian kernel.
 406 <a href="https://github.com/linuxcnc/linuxcnc">The source code</a> is
 407 available from Github.  The last few months I've been involved in the
 408 translation setup for the program and documentation.  Translators are
 409 most welcome to
 410 <a href="https://hosted.weblate.org/engage/linuxcnc/">join the
 411 effort</a> using Weblate.</p>
 412
 413 <p>As usual, if you use Bitcoin and want to show your support of my
 414 activities, please send Bitcoin donations to my address
 415 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 416
 417       </div>
 418       <div class="tags">
 419
 420
 421         Tags: <a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc</a>, <a href="https://people.skolelinux.org/pere/blog/tags/robot">robot</a>.
 422
 423
 424       </div>
 425     </div>
 426     <div class="padding"></div>
 427
 428     <p style="text-align: right;"><a href="linuxcnc.rss"><img src="https://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
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 430
 431
 432
 433 <h2>Archive</h2>
 434 <ul>
 435
 436 <li>2025
 437 <ul>
 438
 439 <li><a href="https://people.skolelinux.org/pere/blog/archive/2025/01/">January (1)</a></li>
 440
 441 </ul></li>
 442
 443 <li>2023
 444 <ul>
 445
 446 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/01/">January (3)</a></li>
 447
 448 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/02/">February (1)</a></li>
 449
 450 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/04/">April (2)</a></li>
 451
 452 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/05/">May (3)</a></li>
 453
 454 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/06/">June (1)</a></li>
 455
 456 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/08/">August (1)</a></li>
 457
 458 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/09/">September (1)</a></li>
 459
 460 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/10/">October (1)</a></li>
 461
 462 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/11/">November (4)</a></li>
 463
 464 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/12/">December (1)</a></li>
 465
 466 </ul></li>
 467
 468 <li>2022
 469 <ul>
 470
 471 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/02/">February (1)</a></li>
 472
 473 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/03/">March (3)</a></li>
 474
 475 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/04/">April (2)</a></li>
 476
 477 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/06/">June (2)</a></li>
 478
 479 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/07/">July (1)</a></li>
 480
 481 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/09/">September (1)</a></li>
 482
 483 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/10/">October (1)</a></li>
 484
 485 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/12/">December (1)</a></li>
 486
 487 </ul></li>
 488
 489 <li>2021
 490 <ul>
 491
 492 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/01/">January (2)</a></li>
 493
 494 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/02/">February (1)</a></li>
 495
 496 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/05/">May (1)</a></li>
 497
 498 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/06/">June (1)</a></li>
 499
 500 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/07/">July (3)</a></li>
 501
 502 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/08/">August (1)</a></li>
 503
 504 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/09/">September (1)</a></li>
 505
 506 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/10/">October (1)</a></li>
 507
 508 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/12/">December (1)</a></li>
 509
 510 </ul></li>
 511
 512 <li>2020
 513 <ul>
 514
 515 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 516
 517 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 518
 519 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 520
 521 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/05/">May (3)</a></li>
 522
 523 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/06/">June (2)</a></li>
 524
 525 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/07/">July (1)</a></li>
 526
 527 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/09/">September (1)</a></li>
 528
 529 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/10/">October (1)</a></li>
 530
 531 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/11/">November (1)</a></li>
 532
 533 </ul></li>
 534
 535 <li>2019
 536 <ul>
 537
 538 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 539
 540 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 541
 542 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 543
 544 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 545
 546 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 547
 548 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 549
 550 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 551
 552 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 553
 554 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 555
 556 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 557
 558 </ul></li>
 559
 560 <li>2018
 561 <ul>
 562
 563 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 564
 565 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 566
 567 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 568
 569 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 570
 571 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 572
 573 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 574
 575 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 576
 577 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 578
 579 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 580
 581 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 582
 583 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 584
 585 </ul></li>
 586
 587 <li>2017
 588 <ul>
 589
 590 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 591
 592 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 593
 594 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 595
 596 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 597
 598 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 599
 600 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 601
 602 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 603
 604 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 605
 606 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 607
 608 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 609
 610 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 611
 612 </ul></li>
 613
 614 <li>2016
 615 <ul>
 616
 617 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 618
 619 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 620
 621 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 622
 623 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 624
 625 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 626
 627 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 628
 629 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 630
 631 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 632
 633 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 634
 635 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 636
 637 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 638
 639 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 640
 641 </ul></li>
 642
 643 <li>2015
 644 <ul>
 645
 646 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 647
 648 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 649
 650 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 651
 652 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 653
 654 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 655
 656 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 657
 658 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 659
 660 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 661
 662 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 663
 664 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 665
 666 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 667
 668 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 669
 670 </ul></li>
 671
 672 <li>2014
 673 <ul>
 674
 675 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 676
 677 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 678
 679 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 680
 681 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 682
 683 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 684
 685 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 686
 687 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 688
 689 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 690
 691 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 692
 693 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 694
 695 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 696
 697 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 698
 699 </ul></li>
 700
 701 <li>2013
 702 <ul>
 703
 704 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 705
 706 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 707
 708 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 709
 710 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 711
 712 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 713
 714 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 715
 716 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 717
 718 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 719
 720 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 721
 722 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 723
 724 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 725
 726 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 727
 728 </ul></li>
 729
 730 <li>2012
 731 <ul>
 732
 733 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 734
 735 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 736
 737 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 738
 739 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 740
 741 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 742
 743 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 744
 745 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 746
 747 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 748
 749 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 750
 751 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 752
 753 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 754
 755 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 756
 757 </ul></li>
 758
 759 <li>2011
 760 <ul>
 761
 762 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 763
 764 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 765
 766 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 767
 768 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 769
 770 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 771
 772 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 773
 774 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 775
 776 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 777
 778 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 779
 780 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 781
 782 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 783
 784 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 785
 786 </ul></li>
 787
 788 <li>2010
 789 <ul>
 790
 791 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 792
 793 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 794
 795 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 796
 797 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 798
 799 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 800
 801 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 802
 803 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 804
 805 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 806
 807 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 808
 809 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 810
 811 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 812
 813 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 814
 815 </ul></li>
 816
 817 <li>2009
 818 <ul>
 819
 820 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 821
 822 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 823
 824 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 825
 826 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 827
 828 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 829
 830 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 831
 832 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 833
 834 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 835
 836 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 837
 838 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 839
 840 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 841
 842 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 843
 844 </ul></li>
 845
 846 <li>2008
 847 <ul>
 848
 849 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 850
 851 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 852
 853 </ul></li>
 854
 855 </ul>
 856
 857
 858
 859 <h2>Tags</h2>
 860 <ul>
 861
 862  <li><a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (19)</a></li>
 863
 864  <li><a href="https://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 865
 866  <li><a href="https://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 867
 868  <li><a href="https://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 869
 870  <li><a href="https://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (9)</a></li>
 871
 872  <li><a href="https://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (12)</a></li>
 873
 874  <li><a href="https://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 875
 876  <li><a href="https://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 877
 878  <li><a href="https://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (3)</a></li>
 879
 880  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian">debian (197)</a></li>
 881
 882  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (159)</a></li>
 883
 884  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (9)</a></li>
 885
 886  <li><a href="https://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
 887
 888  <li><a href="https://people.skolelinux.org/pere/blog/tags/dld">dld (18)</a></li>
 889
 890  <li><a href="https://people.skolelinux.org/pere/blog/tags/docbook">docbook (32)</a></li>
 891
 892  <li><a href="https://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 893
 894  <li><a href="https://people.skolelinux.org/pere/blog/tags/english">english (456)</a></li>
 895
 896  <li><a href="https://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 897
 898  <li><a href="https://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
 899
 900  <li><a href="https://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (34)</a></li>
 901
 902  <li><a href="https://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 903
 904  <li><a href="https://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
 905
 906  <li><a href="https://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 907
 908  <li><a href="https://people.skolelinux.org/pere/blog/tags/intervju">intervju (43)</a></li>
 909
 910  <li><a href="https://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
 911
 912  <li><a href="https://people.skolelinux.org/pere/blog/tags/kart">kart (23)</a></li>
 913
 914  <li><a href="https://people.skolelinux.org/pere/blog/tags/kodi">kodi (6)</a></li>
 915
 916  <li><a href="https://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 917
 918  <li><a href="https://people.skolelinux.org/pere/blog/tags/lego">lego (5)</a></li>
 919
 920  <li><a href="https://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 921
 922  <li><a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc (5)</a></li>
 923
 924  <li><a href="https://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 925
 926  <li><a href="https://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 927
 928  <li><a href="https://people.skolelinux.org/pere/blog/tags/madewithcc">madewithcc (3)</a></li>
 929
 930  <li><a href="https://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 931
 932  <li><a href="https://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (46)</a></li>
 933
 934  <li><a href="https://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (15)</a></li>
 935
 936  <li><a href="https://people.skolelinux.org/pere/blog/tags/noark5">noark5 (24)</a></li>
 937
 938  <li><a href="https://people.skolelinux.org/pere/blog/tags/norsk">norsk (323)</a></li>
 939
 940  <li><a href="https://people.skolelinux.org/pere/blog/tags/nuug">nuug (198)</a></li>
 941
 942  <li><a href="https://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (40)</a></li>
 943
 944  <li><a href="https://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 945
 946  <li><a href="https://people.skolelinux.org/pere/blog/tags/opensnitch">opensnitch (4)</a></li>
 947
 948  <li><a href="https://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (76)</a></li>
 949
 950  <li><a href="https://people.skolelinux.org/pere/blog/tags/personvern">personvern (114)</a></li>
 951
 952  <li><a href="https://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 953
 954  <li><a href="https://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 955
 956  <li><a href="https://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 957
 958  <li><a href="https://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 959
 960  <li><a href="https://people.skolelinux.org/pere/blog/tags/robot">robot (17)</a></li>
 961
 962  <li><a href="https://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 963
 964  <li><a href="https://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
 965
 966  <li><a href="https://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 967
 968  <li><a href="https://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (60)</a></li>
 969
 970  <li><a href="https://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 971
 972  <li><a href="https://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 973
 974  <li><a href="https://people.skolelinux.org/pere/blog/tags/standard">standard (75)</a></li>
 975
 976  <li><a href="https://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (7)</a></li>
 977
 978  <li><a href="https://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (14)</a></li>
 979
 980  <li><a href="https://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (65)</a></li>
 981
 982  <li><a href="https://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (5)</a></li>
 983
 984  <li><a href="https://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 985
 986  <li><a href="https://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 987
 988  <li><a href="https://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (22)</a></li>
 989
 990  <li><a href="https://people.skolelinux.org/pere/blog/tags/video">video (80)</a></li>
 991
 992  <li><a href="https://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 993
 994  <li><a href="https://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
 995
 996 </ul>
 997
 998
 999     </div>
1000     <p style="text-align: right">
1001  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1002 </p>
1003
1004   </body>
1005 </html>