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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
  22     <div class="entry">
  23       <div class="title"><a href="https://people.skolelinux.org/pere/blog/wmbusmeters__parse_data_from_your_utility_meter___nice_free_software.html">wmbusmeters, parse data from your utility meter - nice free software</a></div>
  24       <div class="date">19th May 2023</div>
  25       <div class="body"><p>There is a European standard for reading utility meters like water,
  26 gas, electricity or heat distribution meters.  The
  27 <a href="https://en.wikipedia.org/wiki/Meter-Bus">Meter-Bus standard
  28 (EN 13757-2, EN 13757-3 and EN 13757–4)</a> provide a cross vendor way
  29 to talk to and collect meter data.  I ran into this standard when I
  30 wanted to monitor some heat distribution meters, and managed to find
  31 free software that could do the job.  The meters in question broadcast
  32 encrypted messages with meter information via radio, and the hardest
  33 part was to track down the encryption keys from the vendor.  With this
  34 in place I could set up a MQTT gateway to submit the meter data for
  35 graphing.</p>
  36
  37 <p>The free software systems in question,
  38 <a href="https://tracker.debian.org/pkg/rtl-wmbus">rtl-wmbus</a> to
  39 read the messages from a software defined radio, and
  40 <a href="https://tracker.debian.org/pkg/wmbusmeters">wmbusmeters</a> to
  41 decrypt and decode the content of the messages, is working very well
  42 and allowe me to get frequent updates from my meters.  I got in touch
  43 with upstream last year to see if there was any interest in publishing
  44 the packages via Debian.  I was very happy to learn that Fredrik
  45 Öhrström volunteered to maintain the packages, and I have since
  46 assisted him in getting Debian package build rules in place as well as
  47 sponsoring the packages into the Debian archive.  Sadly we completed
  48 it too late for them to become part of the next stable Debian release
  49 (Bookworm).  The wmbusmeters package just cleared the NEW queue.  It
  50 will need some work to fix a built problem, but I expect Fredrik will
  51 find a solution soon.</p>
  52
  53 <p>If you got a infrastructure meter supporting the Meter Bus
  54 standard, I strongly recommend having a look at these nice
  55 packages.</p>
  56
  57 <p>As usual, if you use Bitcoin and want to show your support of my
  58 activities, please send Bitcoin donations to my address
  59 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  60 </div>
  61       <div class="tags">
  62
  63
  64         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/nice free software">nice free software</a>.
  65
  66
  67       </div>
  68     </div>
  69     <div class="padding"></div>
  70
  71     <div class="entry">
  72       <div class="title"><a href="https://people.skolelinux.org/pere/blog/The_2023_LinuxCNC_Norwegian_developer_gathering.html">The 2023 LinuxCNC Norwegian developer gathering</a></div>
  73       <div class="date">14th May 2023</div>
  74       <div class="body"><p>The LinuxCNC project is making headway these days.  A lot of
  75 patches and issues have seen activity on
  76 <a href="https://github.com/LinuxCNC/linuxcnc/">the project github
  77 pages</a> recently.  A few weeks ago there was a developer gathering
  78 over at the <a href="https://tormach.com/">Tormach</a> headquarter in
  79 Wisconsin, and now we are planning a new gathering in Norway.  If you
  80 wonder what LinuxCNC is, lets quote Wikipedia:</p>
  81
  82 <blockquote>
  83 "LinuxCNC is a software system for numerical control of
  84 machines such as milling machines, lathes, plasma cutters, routers,
  85 cutting machines, robots and hexapods. It can control up to 9 axes or
  86 joints of a CNC machine using G-code (RS-274NGC) as input. It has
  87 several GUIs suited to specific kinds of usage (touch screen,
  88 interactive development)."
  89 </blockquote>
  90
  91 <p>The Norwegian developer gathering take place the weekend June 16th
  92 to 18th this year, and is open for everyone interested in contributing
  93 to LinuxCNC.  Up to date information about the gathering can be found
  94 in
  95 <a href="https://sourceforge.net/p/emc/mailman/emc-developers/thread/sa64jp06nob.fsf%40hjemme.reinholdtsen.name/#msg37837251">the
  96 developer mailing list thread</a> where the gathering was announced.
  97 Thanks to the good people at
  98 <a href="https://www.debian.org/">Debian</a>,
  99 <a href="https://www.redpill-linpro.com/">Redpill-Linpro</a> and
 100 <a href="https://www.nuugfoundation.no/no/">NUUG Foundation</a>, we
 101 have enough sponsor funds to pay for food, and shelter for the people
 102 traveling from afar to join us.  If you would like to join the
 103 gathering, get in touch.</p>
 104
 105 <p>As usual, if you use Bitcoin and want to show your support of my
 106 activities, please send Bitcoin donations to my address
 107 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 108 </div>
 109       <div class="tags">
 110
 111
 112         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>.
 113
 114
 115       </div>
 116     </div>
 117     <div class="padding"></div>
 118
 119     <div class="entry">
 120       <div class="title"><a href="https://people.skolelinux.org/pere/blog/OpenSnitch_in_Debian_ready_for_prime_time.html">OpenSnitch in Debian ready for prime time</a></div>
 121       <div class="date">13th May 2023</div>
 122       <div class="body"><p>A bit delayed,
 123 <a href="https://tracker.debian.org/pkg/opensnitch">the interactive
 124 application firewall OpenSnitch</a> package in Debian now got the
 125 latest fixes ready for Debian Bookworm.  Because it depend on a
 126 package missing on some architectures, the autopkgtest check of the
 127 testing migration script did not understand that the tests were
 128 actually working, so the migration was delayed.  A bug in the package
 129 dependencies is also fixed, so those installing the firewall package
 130 (opensnitch) now also get the GUI admin tool (python3-opensnitch-ui)
 131 installed by default.  I am very grateful to Gustavo Iñiguez Goya for
 132 his work on getting the package ready for Debian Bookworm.</p>
 133
 134 <p>Armed with this package I have discovered some surprising
 135 connections from programs I believed were able to work completly
 136 offline, and it has already proven its worth, at least to me.  If you
 137 too want to get more familiar with the kind of programs using
 138 Internett connections on your machine, I recommend testing <tt>apt
 139 install opensnitch</tt> in Bookworm and see what you think.</p>
 140
 141 <p>The package is still not able to build its eBPF module within
 142 Debian.  Not sure how much work it would be to get it working, but
 143 suspect some kernel related packages need to be extended with more
 144 header files to get it working.</p>
 145
 146 <p>As usual, if you use Bitcoin and want to show your support of my
 147 activities, please send Bitcoin donations to my address
 148 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 149 </div>
 150       <div class="tags">
 151
 152
 153         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/opensnitch">opensnitch</a>.
 154
 155
 156       </div>
 157     </div>
 158     <div class="padding"></div>
 159
 160     <div class="entry">
 161       <div class="title"><a href="https://people.skolelinux.org/pere/blog/Speech_to_text__she_APTly_whispered__how_hard_can_it_be_.html">Speech to text, she APTly whispered, how hard can it be?</a></div>
 162       <div class="date">23rd April 2023</div>
 163       <div class="body"><p>While visiting a convention during Easter, it occurred to me that
 164 it would be great if I could have a digital Dictaphone with
 165 transcribing capabilities, providing me with texts to cut-n-paste into
 166 stuff I need to write.  The background is that long drives often bring
 167 up the urge to write on texts I am working on, which of course is out
 168 of the question while driving.  With the release of
 169 <a href="https://github.com/openai/whisper/">OpenAI Whisper</a>, this
 170 seem to be within reach with Free Software, so I decided to give it a
 171 go.  OpenAI Whisper is a Linux based neural network system to read in
 172 audio files and provide text representation of the speech in that
 173 audio recording.  It handle multiple languages and according to its
 174 creators even can translate into a different language than the spoken
 175 one.  I have not tested the latter feature.  It can either use the CPU
 176 or a GPU with CUDA support.  As far as I can tell, CUDA in practice
 177 limit that feature to NVidia graphics cards.  I have few of those, as
 178 they do not work great with free software drivers, and have not tested
 179 the GPU option.  While looking into the matter, I did discover some
 180 work to provide CUDA support on non-NVidia GPUs, and some work with
 181 the library used by Whisper to port it to other GPUs, but have not
 182 spent much time looking into GPU support yet.  I've so far used an old
 183 X220 laptop as my test machine, and only transcribed using its
 184 CPU.</p>
 185
 186 <p>As it from a privacy standpoint is unthinkable to use computers
 187 under control of someone else (aka a "cloud" service) to transcribe
 188 ones thoughts and personal notes, I want to run the transcribing
 189 system locally on my own computers.  The only sensible approach to me
 190 is to make the effort I put into this available for any Linux user and
 191 to upload the needed packages into Debian.  Looking at Debian Bookworm, I
 192 discovered that only three packages were missing,
 193 <a href="https://bugs.debian.org/1034307">tiktoken</a>,
 194 <a href="https://bugs.debian.org/1034144">triton</a>, and
 195 <a href="https://bugs.debian.org/1034091">openai-whisper</a>.  For a while
 196 I also believed
 197 <a href="https://bugs.debian.org/1034286">ffmpeg-python</a> was
 198 needed, but as its
 199 <a href="https://github.com/kkroening/ffmpeg-python/issues/760">upstream
 200 seem to have vanished</a> I found it safer
 201 <a href="https://github.com/openai/whisper/pull/1242">to rewrite
 202 whisper</a> to stop depending on in than to introduce ffmpeg-python
 203 into Debian.  I decided to place these packages under the umbrella of
 204 <a href="https://salsa.debian.org/deeplearning-team">the Debian Deep
 205 Learning Team</a>, which seem like the best team to look after such
 206 packages.  Discussing the topic within the group also made me aware
 207 that the triton package was already a future dependency of newer
 208 versions of the torch package being planned, and would be needed after
 209 Bookworm is released.</p>
 210
 211 <p>All required code packages have been now waiting in
 212 <a href="https://ftp-master.debian.org/new.html">the Debian NEW
 213 queue</a> since Wednesday, heading for Debian Experimental until
 214 Bookworm is released.  An unsolved issue is how to handle the neural
 215 network models used by Whisper.  The default behaviour of Whisper is
 216 to require Internet connectivity and download the model requested to
 217 <tt>~/.cache/whisper/</tt> on first invocation.  This obviously would
 218 fail <a href="https://people.debian.org/~bap/dfsg-faq.html">the
 219 deserted island test of free software</a> as the Debian packages would
 220 be unusable for someone stranded with only the Debian archive and solar
 221 powered computer on a deserted island.</p>
 222
 223 <p>Because of this, I would love to include the models in the Debian
 224 mirror system.  This is problematic, as the models are very large
 225 files, which would put a heavy strain on the Debian mirror
 226 infrastructure around the globe.  The strain would be even higher if
 227 the models change often, which luckily as far as I can tell they do
 228 not.  The small model, which according to its creator is most useful
 229 for English and in my experience is not doing a great job there
 230 either, is 462 MiB (deb is 414 MiB).  The medium model, which to me
 231 seem to handle English speech fairly well is 1.5 GiB (deb is 1.3 GiB)
 232 and the large model is 2.9 GiB (deb is 2.6 GiB).  I would assume
 233 everyone with enough resources would prefer to use the large model for
 234 highest quality.  I believe the models themselves would have to go
 235 into the non-free part of the Debian archive, as they are not really
 236 including any useful source code for updating the models.  The
 237 "source", aka the model training set, according to the creators
 238 consist of "680,000 hours of multilingual and multitask supervised
 239 data collected from the web", which to me reads material with both
 240 unknown copyright terms, unavailable to the general public.  In other
 241 words, the source is not available according to the Debian Free
 242 Software Guidelines and the model should be considered non-free.</p>
 243
 244 <p>I asked the Debian FTP masters for advice regarding uploading a
 245 model package on their IRC channel, and based on the feedback there it
 246 is still unclear to me if such package would be accepted into the
 247 archive.  In any case I wrote build rules for a
 248 <a href="https://salsa.debian.org/deeplearning-team/openai-whisper-model">OpenAI
 249 Whisper model package</a> and
 250 <a href="https://github.com/openai/whisper/pull/1257">modified the
 251 Whisper code base</a> to prefer shared files under <tt>/usr/</tt> and
 252 <tt>/var/</tt> over user specific files in <tt>~/.cache/whisper/</tt>
 253 to be able to use these model packages, to prepare for such
 254 possibility.  One solution might be to include only one of the models
 255 (small or medium, I guess) in the Debian archive, and ask people to
 256 download the others from the Internet.  Not quite sure what to do
 257 here, and advice is most welcome (use the debian-ai mailing list).</p>
 258
 259 <p>To make it easier to test the new packages while I wait for them to
 260 clear the NEW queue, I created an APT source targeting bookworm.  I
 261 selected Bookworm instead of Bullseye, even though I know the latter
 262 would reach more users, is that some of the required dependencies are
 263 missing from Bullseye and I during this phase of testing did not want
 264 to backport a lot of packages just to get up and running.</p>
 265
 266 <p>Here is a recipe to run as user root if you want to test OpenAI
 267 Whisper using Debian packages on your Debian Bookworm installation,
 268 first adding the APT repository GPG key to the list of trusted keys,
 269 then setting up the APT repository and finally installing the packages
 270 and one of the models:</p>
 271
 272 <p><pre>
 273 curl https://geekbay.nuug.no/~pere/openai-whisper/D78F5C4796F353D211B119E28200D9B589641240.asc \
 274   -o /etc/apt/trusted.gpg.d/pere-whisper.asc
 275 mkdir -p /etc/apt/sources.list.d
 276 cat > /etc/apt/sources.list.d/pere-whisper.list &lt;&lt;EOF
 277 deb https://geekbay.nuug.no/~pere/openai-whisper/ bookworm main
 278 deb-src https://geekbay.nuug.no/~pere/openai-whisper/ bookworm main
 279 EOF
 280 apt update
 281 apt install openai-whisper
 282 </pre></p>
 283
 284 <p>The package work for me, but have not yet been tested on any other
 285 computer than my own.  With it, I have been able to (badly) transcribe
 286 a 2 minute 40 second Norwegian audio clip to test using the small
 287 model.  This took 11 minutes and around 2.2 GiB of RAM.  Transcribing
 288 the same file with the medium model gave a accurate text in 77 minutes
 289 using around 5.2 GiB of RAM.  My test machine had too little memory to
 290 test the large model, which I believe require 11 GiB of RAM.  In
 291 short, this now work for me using Debian packages, and I hope it will
 292 for you and everyone else once the packages enter Debian.</p>
 293
 294 <p>Now I can start on the audio recording part of this project.</p>
 295
 296 <p>As usual, if you use Bitcoin and want to show your support of my
 297 activities, please send Bitcoin donations to my address
 298 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 299 </div>
 300       <div class="tags">
 301
 302
 303         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/multimedia">multimedia</a>, <a href="https://people.skolelinux.org/pere/blog/tags/video">video</a>.
 304
 305
 306       </div>
 307     </div>
 308     <div class="padding"></div>
 309
 310     <div class="entry">
 311       <div class="title"><a href="https://people.skolelinux.org/pere/blog/rtlsdr_scanner__software_defined_radio_frequency_scanner_for_Linux____nice_free_software.html">rtlsdr-scanner, software defined radio frequency scanner for Linux  - nice free software</a></div>
 312       <div class="date"> 7th April 2023</div>
 313       <div class="body"><p>Today I finally found time to track down a useful radio frequency
 314 scanner for my software defined radio.  Just for fun I tried to locate
 315 the radios used in the areas, and a good start would be to scan all
 316 the frequencies to see what is in use.  I've tried to find a useful
 317 program earlier, but ran out of time before I managed to find a useful
 318 tool.  This time I was more successful, and after a few false leads I
 319 found a description of
 320 <a href="https://www.kali.org/tools/rtlsdr-scanner/">rtlsdr-scanner
 321 over at the Kali site</a>, and was able to track down
 322 <a href="https://gitlab.com/kalilinux/packages/rtlsdr-scanner.git">the
 323 Kali package git repository</a> to build a deb package for the
 324 scanner.  Sadly the package is missing from the Debian project itself,
 325 at least in Debian Bullseye.  Two runtime dependencies,
 326 <a href="https://gitlab.com/kalilinux/packages/python-visvis.git">python-visvis</a>
 327 and
 328 <a href="https://gitlab.com/kalilinux/packages/python-rtlsdr.git">python-rtlsdr</a>
 329 had to be built and installed separately.  Luckily '<tt>gbp
 330 buildpackage</tt>' handled them just fine and no further packages had
 331 to be manually built.  The end result worked out of the box after
 332 installation.</p>
 333
 334 <p>My initial scans for FM channels worked just fine, so I knew the
 335 scanner was functioning.  But when I tried to scan every frequency
 336 from 100 to 1000 MHz, the program stopped unexpectedly near the
 337 completion.  After some debugging I discovered USB software radio I
 338 used rejected frequencies above 948 MHz, triggering a unreported
 339 exception breaking the scan.  Changing the scan to end at 957 worked
 340 better.  I similarly found the lower limit to be around 15, and ended
 341 up with the following full scan:</p>
 342
 343 <p><a href="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png"><img src="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png" width="100%"></a></p>
 344
 345 <p>Saving the scan did not work, but exporting it as a CSV file worked
 346 just fine.  I ended up with around 477k CVS lines with dB level for
 347 the given frequency.</p>
 348
 349 <p>The save failure seem to be a missing UTF-8 encoding issue in the
 350 python code.  Will see if I can find time to send a patch
 351 <a href="https://github.com/CdeMills/RTLSDR-Scanner/">upstream</a>
 352 later to fix this exception:</p>
 353
 354 <pre>
 355 Traceback (most recent call last):
 356   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
 357     save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
 358   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
 359     handle.write(json.dumps(data, indent=4))
 360 TypeError: a bytes-like object is required, not 'str'
 361 Traceback (most recent call last):
 362   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
 363     save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
 364   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
 365     handle.write(json.dumps(data, indent=4))
 366 TypeError: a bytes-like object is required, not 'str'
 367 </pre>
 368
 369 <p>As usual, if you use Bitcoin and want to show your support of my
 370 activities, please send Bitcoin donations to my address
 371 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 372 </div>
 373       <div class="tags">
 374
 375
 376         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/nice free software">nice free software</a>.
 377
 378
 379       </div>
 380     </div>
 381     <div class="padding"></div>
 382
 383     <div class="entry">
 384       <div class="title"><a href="https://people.skolelinux.org/pere/blog/OpenSnitch_available_in_Debian_Sid_and_Bookworm.html">OpenSnitch available in Debian Sid and Bookworm</a></div>
 385       <div class="date">25th February 2023</div>
 386       <div class="body"><p>Thanks to the efforts of the OpenSnitch lead developer Gustavo
 387 Iñiguez Goya allowing me to sponsor the upload,
 388 <a href="https://tracker.debian.org/pkg/opensnitch">the interactive
 389 application firewall OpenSnitch</a> is now available in Debian
 390 Testing, soon to become the next stable release of Debian.</p>
 391
 392 <p>This is a package which set up a network firewall on one or more
 393 machines, which is controlled by a graphical user interface that will
 394 ask the user if a program should be allowed to connect to the local
 395 network or the Internet.  If some background daemon is trying to dial
 396 home, it can be blocked from doing so with a simple mouse click, or by
 397 default simply by not doing anything when the GUI question dialog pop
 398 up.  A list of all programs discovered using the network is provided
 399 in the GUI, giving the user an overview of how the machine(s) programs
 400 use the network.</p>
 401
 402 <p>OpenSnitch was uploaded for NEW processing about a month ago, and I
 403 had little hope of it getting accepted and shaping up in time for the
 404 package freeze, but the Debian ftpmasters proved to be amazingly quick
 405 at checking out the package and it was accepted into the archive about
 406 week after the first upload.  It is now team maintained under the Go
 407 language team umbrella.  A few fixes to the default setup is only in
 408 Sid, and should migrate to Testing/Bookworm in a week.</p>
 409
 410 <p>During testing I ran into an
 411 <a href="https://github.com/evilsocket/opensnitch/issues/813">issue
 412 with Minecraft server broadcasts disappearing</a>, which was quickly
 413 resolved by the developer with a patch and a proposed configuration
 414 change.  I've been told this was caused by the Debian packages default
 415 use if /proc/ information to track down kernel status, instead of the
 416 newer eBPF module that can be used.  The reason is simply that
 417 upstream and I have failed to find a way to build the eBPF modules for
 418 OpenSnitch without a complete configured Linux kernel source tree,
 419 which as far as we can tell is unavailable as a build dependency in
 420 Debian.  We tried unsuccessfully so far to use the kernel-headers
 421 package.  It would be great if someone could provide some clues how to
 422 build eBPF modules on build daemons in Debian, possibly without the full
 423 kernel source.</p>
 424
 425 <p>As usual, if you use Bitcoin and want to show your support of my
 426 activities, please send Bitcoin donations to my address
 427 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 428 </div>
 429       <div class="tags">
 430
 431
 432         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/opensnitch">opensnitch</a>.
 433
 434
 435       </div>
 436     </div>
 437     <div class="padding"></div>
 438
 439     <div class="entry">
 440       <div class="title"><a href="https://people.skolelinux.org/pere/blog/Is_the_desktop_recommending_your_program_for_opening_its_files_.html">Is the desktop recommending your program for opening its files?</a></div>
 441       <div class="date">29th January 2023</div>
 442       <div class="body"><p>Linux desktop systems
 443 <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">have
 444 standardized</a> how programs present themselves to the desktop
 445 system.  If a package include a .desktop file in
 446 /usr/share/applications/, Gnome, KDE, LXDE, Xfce and the other desktop
 447 environments will pick up the file and use its content to generate the
 448 menu of available programs in the system.  A lesser known fact is that
 449 a package can also explain to the desktop system how to recognize the
 450 files created by the program in question, and use it to open these
 451 files on request, for example via a GUI file browser.</p>
 452
 453 <p>A while back I ran into a package that did not tell the desktop
 454 system how to recognize its files and was not used to open its files
 455 in the file browser and fixed it.  In the process I wrote a simple
 456 debian/tests/ script to ensure the setup keep working.  It might be
 457 useful for other packages too, to ensure any future version of the
 458 package keep handling its own files.</p>
 459
 460 <p>For this to work the file format need a useful MIME type that can
 461 be used to identify the format.  If the file format do not yet have a
 462 MIME type, it should define one and preferably also
 463 <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">register
 464 it with IANA</a> to ensure the MIME type string is reserved.</p>
 465
 466 <p>The script uses the <tt>xdg-mime</tt> program from xdg-utils to
 467 query the database of standardized package information and ensure it
 468 return sensible values.  It also need the location of an example file
 469 for xdg-mime to guess the format of.</p>
 470
 471 <pre>
 472 #!/bin/sh
 473 #
 474 # Author: Petter Reinholdtsen
 475 # License: GPL v2 or later at your choice.
 476 #
 477 # Validate the MIME setup, making sure motor types have
 478 # application/vnd.openmotor+yaml associated with them and is connected
 479 # to the openmotor desktop file.
 480
 481 retval=0
 482
 483 mimetype="application/vnd.openmotor+yaml"
 484 testfile="test/data/real/o3100/motor.ric"
 485 mydesktopfile="openmotor.desktop"
 486
 487 filemime="$(xdg-mime query filetype "$testfile")"
 488
 489 if [ "$mimetype" != "$filemime" ] ; then
 490     retval=1
 491     echo "error: xdg-mime claim motor file MIME type is $filemine, not $mimetype"
 492 else
 493     echo "success: xdg-mime report correct mime type $mimetype for motor file"
 494 fi
 495
 496 desktop=$(xdg-mime query default "$mimetype")
 497
 498 if [ "$mydesktopfile" != "$desktop" ]; then
 499     retval=1
 500     echo "error: xdg-mime claim motor file should be handled by $desktop, not $mydesktopfile"
 501 else
 502     echo "success: xdg-mime agree motor file should be handled by $mydesktopfile"
 503 fi
 504
 505 exit $retval
 506 </pre>
 507
 508 <p>It is a simple way to ensure your users are not very surprised when
 509 they try to open one of your file formats in their file browser.</p>
 510
 511 <p>As usual, if you use Bitcoin and want to show your support of my
 512 activities, please send Bitcoin donations to my address
 513 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 514 </div>
 515       <div class="tags">
 516
 517
 518         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>.
 519
 520
 521       </div>
 522     </div>
 523     <div class="padding"></div>
 524
 525     <div class="entry">
 526       <div class="title"><a href="https://people.skolelinux.org/pere/blog/Opensnitch__the_application_level_interactive_firewall__heading_into_the_Debian_archive.html">Opensnitch, the application level interactive firewall, heading into the Debian archive</a></div>
 527       <div class="date">22nd January 2023</div>
 528       <div class="body"><p>While reading a
 529 <a href="https://sneak.berlin/20230115/macos-scans-your-local-files-now/">blog
 530 post claiming MacOS X recently started scanning local files and
 531 reporting information about them to Apple</a>, even on a machine where
 532 all such callback features had been disabled, I came across a
 533 description of the Little Snitch application for MacOS X.  It seemed
 534 like a very nice tool to have in the tool box, and I decided to see if
 535 something similar was available for Linux.</p>
 536
 537 <p>It did not take long to find
 538 <a href="https://github.com/evilsocket/opensnitch">the OpenSnitch
 539 package</a>, which has been in development since 2017, and now is in
 540 version 1.5.0.  It has had a
 541 <a href="https://bugs.debian.org/909567">request for Debian
 542 packaging</a> since 2018, but no-one completed the job so far.  Just
 543 for fun, I decided to see if I could help, and I was very happy to
 544 discover that
 545 <a href="https://github.com/evilsocket/opensnitch/issues/304">upstream
 546 want a Debian package too</a>.</p>
 547
 548 <p>After struggling a bit with getting the program to run, figuring
 549 out building Go programs (and a little failed detour to look at eBPF
 550 builds too - help needed), I am very happy to report that I am
 551 sponsoring upstream to maintain the package in Debian, and it has
 552 since this morning been waiting in NEW for the ftpmasters to have a
 553 look.  Perhaps it can get into the archive in time for the Bookworm
 554 release?</p>
 555
 556 <p>As usual, if you use Bitcoin and want to show your support of my
 557 activities, please send Bitcoin donations to my address
 558 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 559 </div>
 560       <div class="tags">
 561
 562
 563         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/opensnitch">opensnitch</a>.
 564
 565
 566       </div>
 567     </div>
 568     <div class="padding"></div>
 569
 570     <div class="entry">
 571       <div class="title"><a href="https://people.skolelinux.org/pere/blog/LinuxCNC_MQTT_publisher_component.html">LinuxCNC MQTT publisher component</a></div>
 572       <div class="date"> 8th January 2023</div>
 573       <div class="body"><p>I watched <a href="https://yewtu.be/watch?v=jmKUV3aNLjk">a 2015
 574 video from Andreas Schiffler</a> the other day, where he set up
 575 <a href="https://linuxcnc.org/">LinuxCNC</a> to send status
 576 information to the MQTT broker IBM Bluemix.  As I also use MQTT for
 577 graphing, it occured to me that a generic MQTT LinuxCNC component
 578 would be useful and I set out to implement it.  Today I got the first
 579 draft limping along and submitted as
 580 <a href="https://github.com/LinuxCNC/linuxcnc/pull/2253">a patch to the
 581 LinuxCNC project</a>.</p>
 582
 583 <p>The simple part was setting up the MQTT publishing code in Python.
 584 I already have set up other parts submitting data to my Mosquito MQTT
 585 broker, so I could reuse that code.  Writing a LinuxCNC component in
 586 Python as new to me, but using existing examples in the code
 587 repository and the extensive documentation, this was fairly straight
 588 forward.  The hardest part was creating a automated test for the
 589 component to ensure it was working.  Testing it in a simulated
 590 LinuxCNC machine proved very useful, as I discovered features I needed
 591 that I had not thought of yet, and adjusted the code quite a bit to
 592 make it easier to test without a operational MQTT broker
 593 available.</p>
 594
 595 <p>The draft is ready and working, but I am unsure which LinuxCNC HAL
 596 pins I should collect and publish by default (in other words, the
 597 default set of information pieces published), and how to get the
 598 machine name from the LinuxCNC INI file.  The latter is a minor
 599 detail, but I expect it would be useful in a setup with several
 600 machines available.  I am hoping for feedback from the experienced
 601 LinuxCNC developers and users, to make the component even better
 602 before it can go into the mainland LinuxCNC code base.</p>
 603
 604 <p>Since I started on the MQTT component, I came across
 605 <a href="https://yewtu.be/watch?v=Bqa2grG0XtA">another video from Kent
 606 VanderVelden</a> where he combine LinuxCNC with a set of screen glasses
 607 controlled by a Raspberry Pi, and it occured to me that it would
 608 be useful for such use cases if LinuxCNC also provided a REST API for
 609 querying its status.  I hope to start on such component once the MQTT
 610 component is working well.</p>
 611
 612 <p>As usual, if you use Bitcoin and want to show your support of my
 613 activities, please send Bitcoin donations to my address
 614 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 615 </div>
 616       <div class="tags">
 617
 618
 619         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>.
 620
 621
 622       </div>
 623     </div>
 624     <div class="padding"></div>
 625
 626     <div class="entry">
 627       <div class="title"><a href="https://people.skolelinux.org/pere/blog/ONVIF_IP_camera_management_tool_finally_in_Debian.html">ONVIF IP camera management tool finally in Debian</a></div>
 628       <div class="date">24th December 2022</div>
 629       <div class="body"><p>Merry Christmas to you all.  Here is a small gift to all those with
 630 IP cameras following the <a href="https://www.onvif.org/">ONVIF
 631 specification</a>.  There is finally a nice command line and GUI tool
 632 in Debian to manage ONVIF IP cameras.  After working with upstream for
 633 a few months and sponsoring the upload, I am very happy to report that
 634 the <a href="https://tracker.debian.org/libonvif">libonvif package</a>
 635 entered Debian Sid last night.</p>
 636
 637 <p>The package provide a C library to communicate with such cameras, a
 638 command line tool to locate and update settings of (like password) the
 639 cameras and a GUI tool to configure and control the units as well as
 640 preview the video from the camera.  Libonvif is available on Both
 641 Linux and Windows and the GUI tool uses the Qt library.  The main
 642 competitors are non-free software, while libonvif is GNU GPL licensed.
 643 I am very glad Debian users in the future can control their cameras
 644 using a free software system provided by Debian.  But the ONVIF world
 645 is full of slightly broken firmware, where the cameras pretend to
 646 follow the ONVIF specification but fail to set some configuration
 647 values or refuse to provide video to more than one recipient at the
 648 time, and the onvif project is quite young and might take a while
 649 before it completely work with your camera.  Upstream seem eager to
 650 improve the library, so handling any broken camera might be just <a
 651 href="https://github.com/sr99622/libonvif/">a bug report away</a>.</p>
 652
 653 <p>The package just cleared NEW, and need a new source only upload
 654 before it can enter testing.  This will happen in the next few
 655 days.</p>
 656
 657 <p>As usual, if you use Bitcoin and want to show your support of my
 658 activities, please send Bitcoin donations to my address
 659 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 660 </div>
 661       <div class="tags">
 662
 663
 664         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/multimedia">multimedia</a>, <a href="https://people.skolelinux.org/pere/blog/tags/standard">standard</a>, <a href="https://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 665
 666
 667       </div>
 668     </div>
 669     <div class="padding"></div>
 670
 671     <p style="text-align: right;"><a href="index.rss"><img src="https://people.skolelinux.org/pere/blog/xml.gif" alt="RSS feed" width="36" height="14" /></a></p>
 672     <div id="sidebar">
 673
 674
 675
 676 <h2>Archive</h2>
 677 <ul>
 678
 679 <li>2023
 680 <ul>
 681
 682 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/01/">January (3)</a></li>
 683
 684 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/02/">February (1)</a></li>
 685
 686 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/04/">April (2)</a></li>
 687
 688 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/05/">May (3)</a></li>
 689
 690 </ul></li>
 691
 692 <li>2022
 693 <ul>
 694
 695 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/02/">February (1)</a></li>
 696
 697 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/03/">March (3)</a></li>
 698
 699 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/04/">April (2)</a></li>
 700
 701 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/06/">June (2)</a></li>
 702
 703 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/07/">July (1)</a></li>
 704
 705 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/09/">September (1)</a></li>
 706
 707 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/10/">October (1)</a></li>
 708
 709 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/12/">December (1)</a></li>
 710
 711 </ul></li>
 712
 713 <li>2021
 714 <ul>
 715
 716 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/01/">January (2)</a></li>
 717
 718 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/02/">February (1)</a></li>
 719
 720 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/05/">May (1)</a></li>
 721
 722 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/06/">June (1)</a></li>
 723
 724 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/07/">July (3)</a></li>
 725
 726 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/08/">August (1)</a></li>
 727
 728 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/09/">September (1)</a></li>
 729
 730 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/10/">October (1)</a></li>
 731
 732 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/12/">December (1)</a></li>
 733
 734 </ul></li>
 735
 736 <li>2020
 737 <ul>
 738
 739 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 740
 741 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 742
 743 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 744
 745 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/05/">May (3)</a></li>
 746
 747 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/06/">June (2)</a></li>
 748
 749 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/07/">July (1)</a></li>
 750
 751 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/09/">September (1)</a></li>
 752
 753 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/10/">October (1)</a></li>
 754
 755 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/11/">November (1)</a></li>
 756
 757 </ul></li>
 758
 759 <li>2019
 760 <ul>
 761
 762 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 763
 764 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 765
 766 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 767
 768 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 769
 770 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 771
 772 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 773
 774 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 775
 776 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 777
 778 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 779
 780 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 781
 782 </ul></li>
 783
 784 <li>2018
 785 <ul>
 786
 787 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 788
 789 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 790
 791 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 792
 793 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 794
 795 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 796
 797 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 798
 799 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 800
 801 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 802
 803 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 804
 805 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 806
 807 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 808
 809 </ul></li>
 810
 811 <li>2017
 812 <ul>
 813
 814 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 815
 816 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 817
 818 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 819
 820 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 821
 822 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 823
 824 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 825
 826 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 827
 828 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 829
 830 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 831
 832 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 833
 834 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 835
 836 </ul></li>
 837
 838 <li>2016
 839 <ul>
 840
 841 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 842
 843 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 844
 845 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 846
 847 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 848
 849 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 850
 851 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 852
 853 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 854
 855 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 856
 857 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 858
 859 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 860
 861 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 862
 863 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 864
 865 </ul></li>
 866
 867 <li>2015
 868 <ul>
 869
 870 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 871
 872 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 873
 874 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 875
 876 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 877
 878 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 879
 880 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 881
 882 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 883
 884 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 885
 886 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 887
 888 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 889
 890 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 891
 892 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 893
 894 </ul></li>
 895
 896 <li>2014
 897 <ul>
 898
 899 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 900
 901 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 902
 903 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 904
 905 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 906
 907 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 908
 909 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 910
 911 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 912
 913 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 914
 915 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 916
 917 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 918
 919 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 920
 921 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 922
 923 </ul></li>
 924
 925 <li>2013
 926 <ul>
 927
 928 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 929
 930 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 931
 932 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 933
 934 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 935
 936 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 937
 938 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 939
 940 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 941
 942 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 943
 944 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 945
 946 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 947
 948 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 949
 950 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 951
 952 </ul></li>
 953
 954 <li>2012
 955 <ul>
 956
 957 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 958
 959 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 960
 961 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 962
 963 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 964
 965 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 966
 967 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 968
 969 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 970
 971 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 972
 973 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 974
 975 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 976
 977 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 978
 979 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 980
 981 </ul></li>
 982
 983 <li>2011
 984 <ul>
 985
 986 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 987
 988 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 989
 990 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 991
 992 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 993
 994 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 995
 996 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 997
 998 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 999
1000 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1001
1002 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1003
1004 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1005
1006 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1007
1008 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1009
1010 </ul></li>
1011
1012 <li>2010
1013 <ul>
1014
1015 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1016
1017 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1018
1019 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1020
1021 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1022
1023 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1024
1025 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1026
1027 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1028
1029 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1030
1031 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1032
1033 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1034
1035 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1036
1037 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1038
1039 </ul></li>
1040
1041 <li>2009
1042 <ul>
1043
1044 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1045
1046 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1047
1048 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1049
1050 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1051
1052 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1053
1054 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1055
1056 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1057
1058 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1059
1060 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1061
1062 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1063
1064 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1065
1066 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1067
1068 </ul></li>
1069
1070 <li>2008
1071 <ul>
1072
1073 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1074
1075 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1076
1077 </ul></li>
1078
1079 </ul>
1080
1081
1082
1083 <h2>Tags</h2>
1084 <ul>
1085
1086  <li><a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (19)</a></li>
1087
1088  <li><a href="https://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1089
1090  <li><a href="https://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1091
1092  <li><a href="https://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1093
1094  <li><a href="https://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (9)</a></li>
1095
1096  <li><a href="https://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (12)</a></li>
1097
1098  <li><a href="https://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
1099
1100  <li><a href="https://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1101
1102  <li><a href="https://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1103
1104  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian">debian (193)</a></li>
1105
1106  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (159)</a></li>
1107
1108  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (9)</a></li>
1109
1110  <li><a href="https://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
1111
1112  <li><a href="https://people.skolelinux.org/pere/blog/tags/dld">dld (18)</a></li>
1113
1114  <li><a href="https://people.skolelinux.org/pere/blog/tags/docbook">docbook (30)</a></li>
1115
1116  <li><a href="https://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1117
1118  <li><a href="https://people.skolelinux.org/pere/blog/tags/english">english (449)</a></li>
1119
1120  <li><a href="https://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1121
1122  <li><a href="https://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
1123
1124  <li><a href="https://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (34)</a></li>
1125
1126  <li><a href="https://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1127
1128  <li><a href="https://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
1129
1130  <li><a href="https://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1131
1132  <li><a href="https://people.skolelinux.org/pere/blog/tags/intervju">intervju (43)</a></li>
1133
1134  <li><a href="https://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
1135
1136  <li><a href="https://people.skolelinux.org/pere/blog/tags/kart">kart (23)</a></li>
1137
1138  <li><a href="https://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
1139
1140  <li><a href="https://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1141
1142  <li><a href="https://people.skolelinux.org/pere/blog/tags/lego">lego (5)</a></li>
1143
1144  <li><a href="https://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1145
1146  <li><a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc (5)</a></li>
1147
1148  <li><a href="https://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1149
1150  <li><a href="https://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1151
1152  <li><a href="https://people.skolelinux.org/pere/blog/tags/madewithcc">madewithcc (3)</a></li>
1153
1154  <li><a href="https://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1155
1156  <li><a href="https://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (45)</a></li>
1157
1158  <li><a href="https://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (15)</a></li>
1159
1160  <li><a href="https://people.skolelinux.org/pere/blog/tags/noark5">noark5 (23)</a></li>
1161
1162  <li><a href="https://people.skolelinux.org/pere/blog/tags/norsk">norsk (320)</a></li>
1163
1164  <li><a href="https://people.skolelinux.org/pere/blog/tags/nuug">nuug (198)</a></li>
1165
1166  <li><a href="https://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (40)</a></li>
1167
1168  <li><a href="https://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1169
1170  <li><a href="https://people.skolelinux.org/pere/blog/tags/opensnitch">opensnitch (3)</a></li>
1171
1172  <li><a href="https://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (75)</a></li>
1173
1174  <li><a href="https://people.skolelinux.org/pere/blog/tags/personvern">personvern (114)</a></li>
1175
1176  <li><a href="https://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1177
1178  <li><a href="https://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1179
1180  <li><a href="https://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1181
1182  <li><a href="https://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1183
1184  <li><a href="https://people.skolelinux.org/pere/blog/tags/robot">robot (17)</a></li>
1185
1186  <li><a href="https://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1187
1188  <li><a href="https://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
1189
1190  <li><a href="https://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1191
1192  <li><a href="https://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (59)</a></li>
1193
1194  <li><a href="https://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1195
1196  <li><a href="https://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1197
1198  <li><a href="https://people.skolelinux.org/pere/blog/tags/standard">standard (74)</a></li>
1199
1200  <li><a href="https://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (7)</a></li>
1201
1202  <li><a href="https://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (14)</a></li>
1203
1204  <li><a href="https://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (64)</a></li>
1205
1206  <li><a href="https://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (5)</a></li>
1207
1208  <li><a href="https://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1209
1210  <li><a href="https://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1211
1212  <li><a href="https://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (20)</a></li>
1213
1214  <li><a href="https://people.skolelinux.org/pere/blog/tags/video">video (78)</a></li>
1215
1216  <li><a href="https://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1217
1218  <li><a href="https://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
1219
1220 </ul>
1221
1222
1223     </div>
1224     <p style="text-align: right">
1225  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1226 </p>
1227
1228   </body>
1229 </html>