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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/What_did_I_learn_from_OpenSnitch_this_summer_.html">What did I learn from OpenSnitch this summer?</a></div>
  24       <div class="date">11th June 2023</div>
  25       <div class="body"><p>With yesterdays
  26 <a href="https://www.debian.org/News/2023/20230610">release of Debian
  27 12 Bookworm</a>, I am happy to know the
  28 <a href="https://tracker.debian.org/pkg/opensnitch">the interactive
  29 application firewall OpenSnitch</a> is available for a wider audience.
  30 I have been running it for a few weeks now, and have been surprised
  31 about some of the programs connecting to the Internet.  Some programs
  32 are obviously calling out from my machine, like the NTP network based
  33 clock adjusting system and Tor to reach other Tor clients, but others
  34 were more dubious.  For example, the KDE Window manager try to look up
  35 the host name in DNS, for no apparent reason, but if this lookup is
  36 blocked the KDE desktop get periodically stuck when I use it.  Another
  37 surprise was how much Firefox call home directly to mozilla.com,
  38 mozilla.net and googleapis.com, to mention a few, when I visit other
  39 web pages.  This direct connection happen even if I told Firefox to
  40 always use a proxy, and the proxy setting is ignored for this traffic.
  41 Other surprising connections come from audacity and dirmngr (I do not
  42 use Gnome).  It took some trial and error to get a good default set of
  43 permissions.  Without it, I would get popups asking for permissions at
  44 any time, also the most inconvenient ones where I am in the middle of
  45 a time sensitive gaming session.</p>
  46
  47 <p>I suspect some application developers should rethink when then need
  48 to use network connections or DNS lookups, and recommend testing
  49 OpenSnitch (only <tt>apt install opensnitch</tt> away in Debian
  50 Bookworm) to locate and report any surprising Internet connections on
  51 your desktop machine.</p>
  52
  53 <p>At the moment the upstream developer and Debian package maintainer
  54 is working on making the system more reliable in Debian, by enabling
  55 the eBPF kernel module to track processes and connections instead of
  56 depending in content in /proc/.  This should enter unstable fairly
  57 soon.</p>
  58
  59 <p>As usual, if you use Bitcoin and want to show your support of my
  60 activities, please send Bitcoin donations to my address
  61 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  62 </div>
  63       <div class="tags">
  64
  65
  66         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>.
  67
  68
  69       </div>
  70     </div>
  71     <div class="padding"></div>
  72
  73     <div class="entry">
  74       <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>
  75       <div class="date">19th May 2023</div>
  76       <div class="body"><p>There is a European standard for reading utility meters like water,
  77 gas, electricity or heat distribution meters.  The
  78 <a href="https://en.wikipedia.org/wiki/Meter-Bus">Meter-Bus standard
  79 (EN 13757-2, EN 13757-3 and EN 13757–4)</a> provide a cross vendor way
  80 to talk to and collect meter data.  I ran into this standard when I
  81 wanted to monitor some heat distribution meters, and managed to find
  82 free software that could do the job.  The meters in question broadcast
  83 encrypted messages with meter information via radio, and the hardest
  84 part was to track down the encryption keys from the vendor.  With this
  85 in place I could set up a MQTT gateway to submit the meter data for
  86 graphing.</p>
  87
  88 <p>The free software systems in question,
  89 <a href="https://tracker.debian.org/pkg/rtl-wmbus">rtl-wmbus</a> to
  90 read the messages from a software defined radio, and
  91 <a href="https://tracker.debian.org/pkg/wmbusmeters">wmbusmeters</a> to
  92 decrypt and decode the content of the messages, is working very well
  93 and allowe me to get frequent updates from my meters.  I got in touch
  94 with upstream last year to see if there was any interest in publishing
  95 the packages via Debian.  I was very happy to learn that Fredrik
  96 Öhrström volunteered to maintain the packages, and I have since
  97 assisted him in getting Debian package build rules in place as well as
  98 sponsoring the packages into the Debian archive.  Sadly we completed
  99 it too late for them to become part of the next stable Debian release
 100 (Bookworm).  The wmbusmeters package just cleared the NEW queue.  It
 101 will need some work to fix a built problem, but I expect Fredrik will
 102 find a solution soon.</p>
 103
 104 <p>If you got a infrastructure meter supporting the Meter Bus
 105 standard, I strongly recommend having a look at these nice
 106 packages.</p>
 107
 108 <p>As usual, if you use Bitcoin and want to show your support of my
 109 activities, please send Bitcoin donations to my address
 110 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 111 </div>
 112       <div class="tags">
 113
 114
 115         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>.
 116
 117
 118       </div>
 119     </div>
 120     <div class="padding"></div>
 121
 122     <div class="entry">
 123       <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>
 124       <div class="date">14th May 2023</div>
 125       <div class="body"><p>The LinuxCNC project is making headway these days.  A lot of
 126 patches and issues have seen activity on
 127 <a href="https://github.com/LinuxCNC/linuxcnc/">the project github
 128 pages</a> recently.  A few weeks ago there was a developer gathering
 129 over at the <a href="https://tormach.com/">Tormach</a> headquarter in
 130 Wisconsin, and now we are planning a new gathering in Norway.  If you
 131 wonder what LinuxCNC is, lets quote Wikipedia:</p>
 132
 133 <blockquote>
 134 "LinuxCNC is a software system for numerical control of
 135 machines such as milling machines, lathes, plasma cutters, routers,
 136 cutting machines, robots and hexapods. It can control up to 9 axes or
 137 joints of a CNC machine using G-code (RS-274NGC) as input. It has
 138 several GUIs suited to specific kinds of usage (touch screen,
 139 interactive development)."
 140 </blockquote>
 141
 142 <p>The Norwegian developer gathering take place the weekend June 16th
 143 to 18th this year, and is open for everyone interested in contributing
 144 to LinuxCNC.  Up to date information about the gathering can be found
 145 in
 146 <a href="https://sourceforge.net/p/emc/mailman/emc-developers/thread/sa64jp06nob.fsf%40hjemme.reinholdtsen.name/#msg37837251">the
 147 developer mailing list thread</a> where the gathering was announced.
 148 Thanks to the good people at
 149 <a href="https://www.debian.org/">Debian</a>,
 150 <a href="https://www.redpill-linpro.com/">Redpill-Linpro</a> and
 151 <a href="https://www.nuugfoundation.no/no/">NUUG Foundation</a>, we
 152 have enough sponsor funds to pay for food, and shelter for the people
 153 traveling from afar to join us.  If you would like to join the
 154 gathering, get in touch.</p>
 155
 156 <p>As usual, if you use Bitcoin and want to show your support of my
 157 activities, please send Bitcoin donations to my address
 158 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 159 </div>
 160       <div class="tags">
 161
 162
 163         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>.
 164
 165
 166       </div>
 167     </div>
 168     <div class="padding"></div>
 169
 170     <div class="entry">
 171       <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>
 172       <div class="date">13th May 2023</div>
 173       <div class="body"><p>A bit delayed,
 174 <a href="https://tracker.debian.org/pkg/opensnitch">the interactive
 175 application firewall OpenSnitch</a> package in Debian now got the
 176 latest fixes ready for Debian Bookworm.  Because it depend on a
 177 package missing on some architectures, the autopkgtest check of the
 178 testing migration script did not understand that the tests were
 179 actually working, so the migration was delayed.  A bug in the package
 180 dependencies is also fixed, so those installing the firewall package
 181 (opensnitch) now also get the GUI admin tool (python3-opensnitch-ui)
 182 installed by default.  I am very grateful to Gustavo Iñiguez Goya for
 183 his work on getting the package ready for Debian Bookworm.</p>
 184
 185 <p>Armed with this package I have discovered some surprising
 186 connections from programs I believed were able to work completly
 187 offline, and it has already proven its worth, at least to me.  If you
 188 too want to get more familiar with the kind of programs using
 189 Internett connections on your machine, I recommend testing <tt>apt
 190 install opensnitch</tt> in Bookworm and see what you think.</p>
 191
 192 <p>The package is still not able to build its eBPF module within
 193 Debian.  Not sure how much work it would be to get it working, but
 194 suspect some kernel related packages need to be extended with more
 195 header files to get it working.</p>
 196
 197 <p>As usual, if you use Bitcoin and want to show your support of my
 198 activities, please send Bitcoin donations to my address
 199 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 200 </div>
 201       <div class="tags">
 202
 203
 204         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>.
 205
 206
 207       </div>
 208     </div>
 209     <div class="padding"></div>
 210
 211     <div class="entry">
 212       <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>
 213       <div class="date">23rd April 2023</div>
 214       <div class="body"><p>While visiting a convention during Easter, it occurred to me that
 215 it would be great if I could have a digital Dictaphone with
 216 transcribing capabilities, providing me with texts to cut-n-paste into
 217 stuff I need to write.  The background is that long drives often bring
 218 up the urge to write on texts I am working on, which of course is out
 219 of the question while driving.  With the release of
 220 <a href="https://github.com/openai/whisper/">OpenAI Whisper</a>, this
 221 seem to be within reach with Free Software, so I decided to give it a
 222 go.  OpenAI Whisper is a Linux based neural network system to read in
 223 audio files and provide text representation of the speech in that
 224 audio recording.  It handle multiple languages and according to its
 225 creators even can translate into a different language than the spoken
 226 one.  I have not tested the latter feature.  It can either use the CPU
 227 or a GPU with CUDA support.  As far as I can tell, CUDA in practice
 228 limit that feature to NVidia graphics cards.  I have few of those, as
 229 they do not work great with free software drivers, and have not tested
 230 the GPU option.  While looking into the matter, I did discover some
 231 work to provide CUDA support on non-NVidia GPUs, and some work with
 232 the library used by Whisper to port it to other GPUs, but have not
 233 spent much time looking into GPU support yet.  I've so far used an old
 234 X220 laptop as my test machine, and only transcribed using its
 235 CPU.</p>
 236
 237 <p>As it from a privacy standpoint is unthinkable to use computers
 238 under control of someone else (aka a "cloud" service) to transcribe
 239 ones thoughts and personal notes, I want to run the transcribing
 240 system locally on my own computers.  The only sensible approach to me
 241 is to make the effort I put into this available for any Linux user and
 242 to upload the needed packages into Debian.  Looking at Debian Bookworm, I
 243 discovered that only three packages were missing,
 244 <a href="https://bugs.debian.org/1034307">tiktoken</a>,
 245 <a href="https://bugs.debian.org/1034144">triton</a>, and
 246 <a href="https://bugs.debian.org/1034091">openai-whisper</a>.  For a while
 247 I also believed
 248 <a href="https://bugs.debian.org/1034286">ffmpeg-python</a> was
 249 needed, but as its
 250 <a href="https://github.com/kkroening/ffmpeg-python/issues/760">upstream
 251 seem to have vanished</a> I found it safer
 252 <a href="https://github.com/openai/whisper/pull/1242">to rewrite
 253 whisper</a> to stop depending on in than to introduce ffmpeg-python
 254 into Debian.  I decided to place these packages under the umbrella of
 255 <a href="https://salsa.debian.org/deeplearning-team">the Debian Deep
 256 Learning Team</a>, which seem like the best team to look after such
 257 packages.  Discussing the topic within the group also made me aware
 258 that the triton package was already a future dependency of newer
 259 versions of the torch package being planned, and would be needed after
 260 Bookworm is released.</p>
 261
 262 <p>All required code packages have been now waiting in
 263 <a href="https://ftp-master.debian.org/new.html">the Debian NEW
 264 queue</a> since Wednesday, heading for Debian Experimental until
 265 Bookworm is released.  An unsolved issue is how to handle the neural
 266 network models used by Whisper.  The default behaviour of Whisper is
 267 to require Internet connectivity and download the model requested to
 268 <tt>~/.cache/whisper/</tt> on first invocation.  This obviously would
 269 fail <a href="https://people.debian.org/~bap/dfsg-faq.html">the
 270 deserted island test of free software</a> as the Debian packages would
 271 be unusable for someone stranded with only the Debian archive and solar
 272 powered computer on a deserted island.</p>
 273
 274 <p>Because of this, I would love to include the models in the Debian
 275 mirror system.  This is problematic, as the models are very large
 276 files, which would put a heavy strain on the Debian mirror
 277 infrastructure around the globe.  The strain would be even higher if
 278 the models change often, which luckily as far as I can tell they do
 279 not.  The small model, which according to its creator is most useful
 280 for English and in my experience is not doing a great job there
 281 either, is 462 MiB (deb is 414 MiB).  The medium model, which to me
 282 seem to handle English speech fairly well is 1.5 GiB (deb is 1.3 GiB)
 283 and the large model is 2.9 GiB (deb is 2.6 GiB).  I would assume
 284 everyone with enough resources would prefer to use the large model for
 285 highest quality.  I believe the models themselves would have to go
 286 into the non-free part of the Debian archive, as they are not really
 287 including any useful source code for updating the models.  The
 288 "source", aka the model training set, according to the creators
 289 consist of "680,000 hours of multilingual and multitask supervised
 290 data collected from the web", which to me reads material with both
 291 unknown copyright terms, unavailable to the general public.  In other
 292 words, the source is not available according to the Debian Free
 293 Software Guidelines and the model should be considered non-free.</p>
 294
 295 <p>I asked the Debian FTP masters for advice regarding uploading a
 296 model package on their IRC channel, and based on the feedback there it
 297 is still unclear to me if such package would be accepted into the
 298 archive.  In any case I wrote build rules for a
 299 <a href="https://salsa.debian.org/deeplearning-team/openai-whisper-model">OpenAI
 300 Whisper model package</a> and
 301 <a href="https://github.com/openai/whisper/pull/1257">modified the
 302 Whisper code base</a> to prefer shared files under <tt>/usr/</tt> and
 303 <tt>/var/</tt> over user specific files in <tt>~/.cache/whisper/</tt>
 304 to be able to use these model packages, to prepare for such
 305 possibility.  One solution might be to include only one of the models
 306 (small or medium, I guess) in the Debian archive, and ask people to
 307 download the others from the Internet.  Not quite sure what to do
 308 here, and advice is most welcome (use the debian-ai mailing list).</p>
 309
 310 <p>To make it easier to test the new packages while I wait for them to
 311 clear the NEW queue, I created an APT source targeting bookworm.  I
 312 selected Bookworm instead of Bullseye, even though I know the latter
 313 would reach more users, is that some of the required dependencies are
 314 missing from Bullseye and I during this phase of testing did not want
 315 to backport a lot of packages just to get up and running.</p>
 316
 317 <p>Here is a recipe to run as user root if you want to test OpenAI
 318 Whisper using Debian packages on your Debian Bookworm installation,
 319 first adding the APT repository GPG key to the list of trusted keys,
 320 then setting up the APT repository and finally installing the packages
 321 and one of the models:</p>
 322
 323 <p><pre>
 324 curl https://geekbay.nuug.no/~pere/openai-whisper/D78F5C4796F353D211B119E28200D9B589641240.asc \
 325   -o /etc/apt/trusted.gpg.d/pere-whisper.asc
 326 mkdir -p /etc/apt/sources.list.d
 327 cat > /etc/apt/sources.list.d/pere-whisper.list &lt;&lt;EOF
 328 deb https://geekbay.nuug.no/~pere/openai-whisper/ bookworm main
 329 deb-src https://geekbay.nuug.no/~pere/openai-whisper/ bookworm main
 330 EOF
 331 apt update
 332 apt install openai-whisper
 333 </pre></p>
 334
 335 <p>The package work for me, but have not yet been tested on any other
 336 computer than my own.  With it, I have been able to (badly) transcribe
 337 a 2 minute 40 second Norwegian audio clip to test using the small
 338 model.  This took 11 minutes and around 2.2 GiB of RAM.  Transcribing
 339 the same file with the medium model gave a accurate text in 77 minutes
 340 using around 5.2 GiB of RAM.  My test machine had too little memory to
 341 test the large model, which I believe require 11 GiB of RAM.  In
 342 short, this now work for me using Debian packages, and I hope it will
 343 for you and everyone else once the packages enter Debian.</p>
 344
 345 <p>Now I can start on the audio recording part of this project.</p>
 346
 347 <p>As usual, if you use Bitcoin and want to show your support of my
 348 activities, please send Bitcoin donations to my address
 349 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 350 </div>
 351       <div class="tags">
 352
 353
 354         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>.
 355
 356
 357       </div>
 358     </div>
 359     <div class="padding"></div>
 360
 361     <div class="entry">
 362       <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>
 363       <div class="date"> 7th April 2023</div>
 364       <div class="body"><p>Today I finally found time to track down a useful radio frequency
 365 scanner for my software defined radio.  Just for fun I tried to locate
 366 the radios used in the areas, and a good start would be to scan all
 367 the frequencies to see what is in use.  I've tried to find a useful
 368 program earlier, but ran out of time before I managed to find a useful
 369 tool.  This time I was more successful, and after a few false leads I
 370 found a description of
 371 <a href="https://www.kali.org/tools/rtlsdr-scanner/">rtlsdr-scanner
 372 over at the Kali site</a>, and was able to track down
 373 <a href="https://gitlab.com/kalilinux/packages/rtlsdr-scanner.git">the
 374 Kali package git repository</a> to build a deb package for the
 375 scanner.  Sadly the package is missing from the Debian project itself,
 376 at least in Debian Bullseye.  Two runtime dependencies,
 377 <a href="https://gitlab.com/kalilinux/packages/python-visvis.git">python-visvis</a>
 378 and
 379 <a href="https://gitlab.com/kalilinux/packages/python-rtlsdr.git">python-rtlsdr</a>
 380 had to be built and installed separately.  Luckily '<tt>gbp
 381 buildpackage</tt>' handled them just fine and no further packages had
 382 to be manually built.  The end result worked out of the box after
 383 installation.</p>
 384
 385 <p>My initial scans for FM channels worked just fine, so I knew the
 386 scanner was functioning.  But when I tried to scan every frequency
 387 from 100 to 1000 MHz, the program stopped unexpectedly near the
 388 completion.  After some debugging I discovered USB software radio I
 389 used rejected frequencies above 948 MHz, triggering a unreported
 390 exception breaking the scan.  Changing the scan to end at 957 worked
 391 better.  I similarly found the lower limit to be around 15, and ended
 392 up with the following full scan:</p>
 393
 394 <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>
 395
 396 <p>Saving the scan did not work, but exporting it as a CSV file worked
 397 just fine.  I ended up with around 477k CVS lines with dB level for
 398 the given frequency.</p>
 399
 400 <p>The save failure seem to be a missing UTF-8 encoding issue in the
 401 python code.  Will see if I can find time to send a patch
 402 <a href="https://github.com/CdeMills/RTLSDR-Scanner/">upstream</a>
 403 later to fix this exception:</p>
 404
 405 <pre>
 406 Traceback (most recent call last):
 407   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
 408     save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
 409   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
 410     handle.write(json.dumps(data, indent=4))
 411 TypeError: a bytes-like object is required, not 'str'
 412 Traceback (most recent call last):
 413   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
 414     save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
 415   File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
 416     handle.write(json.dumps(data, indent=4))
 417 TypeError: a bytes-like object is required, not 'str'
 418 </pre>
 419
 420 <p>As usual, if you use Bitcoin and want to show your support of my
 421 activities, please send Bitcoin donations to my address
 422 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 423 </div>
 424       <div class="tags">
 425
 426
 427         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>.
 428
 429
 430       </div>
 431     </div>
 432     <div class="padding"></div>
 433
 434     <div class="entry">
 435       <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>
 436       <div class="date">25th February 2023</div>
 437       <div class="body"><p>Thanks to the efforts of the OpenSnitch lead developer Gustavo
 438 Iñiguez Goya allowing me to sponsor the upload,
 439 <a href="https://tracker.debian.org/pkg/opensnitch">the interactive
 440 application firewall OpenSnitch</a> is now available in Debian
 441 Testing, soon to become the next stable release of Debian.</p>
 442
 443 <p>This is a package which set up a network firewall on one or more
 444 machines, which is controlled by a graphical user interface that will
 445 ask the user if a program should be allowed to connect to the local
 446 network or the Internet.  If some background daemon is trying to dial
 447 home, it can be blocked from doing so with a simple mouse click, or by
 448 default simply by not doing anything when the GUI question dialog pop
 449 up.  A list of all programs discovered using the network is provided
 450 in the GUI, giving the user an overview of how the machine(s) programs
 451 use the network.</p>
 452
 453 <p>OpenSnitch was uploaded for NEW processing about a month ago, and I
 454 had little hope of it getting accepted and shaping up in time for the
 455 package freeze, but the Debian ftpmasters proved to be amazingly quick
 456 at checking out the package and it was accepted into the archive about
 457 week after the first upload.  It is now team maintained under the Go
 458 language team umbrella.  A few fixes to the default setup is only in
 459 Sid, and should migrate to Testing/Bookworm in a week.</p>
 460
 461 <p>During testing I ran into an
 462 <a href="https://github.com/evilsocket/opensnitch/issues/813">issue
 463 with Minecraft server broadcasts disappearing</a>, which was quickly
 464 resolved by the developer with a patch and a proposed configuration
 465 change.  I've been told this was caused by the Debian packages default
 466 use if /proc/ information to track down kernel status, instead of the
 467 newer eBPF module that can be used.  The reason is simply that
 468 upstream and I have failed to find a way to build the eBPF modules for
 469 OpenSnitch without a complete configured Linux kernel source tree,
 470 which as far as we can tell is unavailable as a build dependency in
 471 Debian.  We tried unsuccessfully so far to use the kernel-headers
 472 package.  It would be great if someone could provide some clues how to
 473 build eBPF modules on build daemons in Debian, possibly without the full
 474 kernel source.</p>
 475
 476 <p>As usual, if you use Bitcoin and want to show your support of my
 477 activities, please send Bitcoin donations to my address
 478 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 479 </div>
 480       <div class="tags">
 481
 482
 483         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>.
 484
 485
 486       </div>
 487     </div>
 488     <div class="padding"></div>
 489
 490     <div class="entry">
 491       <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>
 492       <div class="date">29th January 2023</div>
 493       <div class="body"><p>Linux desktop systems
 494 <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">have
 495 standardized</a> how programs present themselves to the desktop
 496 system.  If a package include a .desktop file in
 497 /usr/share/applications/, Gnome, KDE, LXDE, Xfce and the other desktop
 498 environments will pick up the file and use its content to generate the
 499 menu of available programs in the system.  A lesser known fact is that
 500 a package can also explain to the desktop system how to recognize the
 501 files created by the program in question, and use it to open these
 502 files on request, for example via a GUI file browser.</p>
 503
 504 <p>A while back I ran into a package that did not tell the desktop
 505 system how to recognize its files and was not used to open its files
 506 in the file browser and fixed it.  In the process I wrote a simple
 507 debian/tests/ script to ensure the setup keep working.  It might be
 508 useful for other packages too, to ensure any future version of the
 509 package keep handling its own files.</p>
 510
 511 <p>For this to work the file format need a useful MIME type that can
 512 be used to identify the format.  If the file format do not yet have a
 513 MIME type, it should define one and preferably also
 514 <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">register
 515 it with IANA</a> to ensure the MIME type string is reserved.</p>
 516
 517 <p>The script uses the <tt>xdg-mime</tt> program from xdg-utils to
 518 query the database of standardized package information and ensure it
 519 return sensible values.  It also need the location of an example file
 520 for xdg-mime to guess the format of.</p>
 521
 522 <pre>
 523 #!/bin/sh
 524 #
 525 # Author: Petter Reinholdtsen
 526 # License: GPL v2 or later at your choice.
 527 #
 528 # Validate the MIME setup, making sure motor types have
 529 # application/vnd.openmotor+yaml associated with them and is connected
 530 # to the openmotor desktop file.
 531
 532 retval=0
 533
 534 mimetype="application/vnd.openmotor+yaml"
 535 testfile="test/data/real/o3100/motor.ric"
 536 mydesktopfile="openmotor.desktop"
 537
 538 filemime="$(xdg-mime query filetype "$testfile")"
 539
 540 if [ "$mimetype" != "$filemime" ] ; then
 541     retval=1
 542     echo "error: xdg-mime claim motor file MIME type is $filemine, not $mimetype"
 543 else
 544     echo "success: xdg-mime report correct mime type $mimetype for motor file"
 545 fi
 546
 547 desktop=$(xdg-mime query default "$mimetype")
 548
 549 if [ "$mydesktopfile" != "$desktop" ]; then
 550     retval=1
 551     echo "error: xdg-mime claim motor file should be handled by $desktop, not $mydesktopfile"
 552 else
 553     echo "success: xdg-mime agree motor file should be handled by $mydesktopfile"
 554 fi
 555
 556 exit $retval
 557 </pre>
 558
 559 <p>It is a simple way to ensure your users are not very surprised when
 560 they try to open one of your file formats in their file browser.</p>
 561
 562 <p>As usual, if you use Bitcoin and want to show your support of my
 563 activities, please send Bitcoin donations to my address
 564 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 565 </div>
 566       <div class="tags">
 567
 568
 569         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>.
 570
 571
 572       </div>
 573     </div>
 574     <div class="padding"></div>
 575
 576     <div class="entry">
 577       <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>
 578       <div class="date">22nd January 2023</div>
 579       <div class="body"><p>While reading a
 580 <a href="https://sneak.berlin/20230115/macos-scans-your-local-files-now/">blog
 581 post claiming MacOS X recently started scanning local files and
 582 reporting information about them to Apple</a>, even on a machine where
 583 all such callback features had been disabled, I came across a
 584 description of the Little Snitch application for MacOS X.  It seemed
 585 like a very nice tool to have in the tool box, and I decided to see if
 586 something similar was available for Linux.</p>
 587
 588 <p>It did not take long to find
 589 <a href="https://github.com/evilsocket/opensnitch">the OpenSnitch
 590 package</a>, which has been in development since 2017, and now is in
 591 version 1.5.0.  It has had a
 592 <a href="https://bugs.debian.org/909567">request for Debian
 593 packaging</a> since 2018, but no-one completed the job so far.  Just
 594 for fun, I decided to see if I could help, and I was very happy to
 595 discover that
 596 <a href="https://github.com/evilsocket/opensnitch/issues/304">upstream
 597 want a Debian package too</a>.</p>
 598
 599 <p>After struggling a bit with getting the program to run, figuring
 600 out building Go programs (and a little failed detour to look at eBPF
 601 builds too - help needed), I am very happy to report that I am
 602 sponsoring upstream to maintain the package in Debian, and it has
 603 since this morning been waiting in NEW for the ftpmasters to have a
 604 look.  Perhaps it can get into the archive in time for the Bookworm
 605 release?</p>
 606
 607 <p>As usual, if you use Bitcoin and want to show your support of my
 608 activities, please send Bitcoin donations to my address
 609 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 610 </div>
 611       <div class="tags">
 612
 613
 614         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>.
 615
 616
 617       </div>
 618     </div>
 619     <div class="padding"></div>
 620
 621     <div class="entry">
 622       <div class="title"><a href="https://people.skolelinux.org/pere/blog/LinuxCNC_MQTT_publisher_component.html">LinuxCNC MQTT publisher component</a></div>
 623       <div class="date"> 8th January 2023</div>
 624       <div class="body"><p>I watched <a href="https://yewtu.be/watch?v=jmKUV3aNLjk">a 2015
 625 video from Andreas Schiffler</a> the other day, where he set up
 626 <a href="https://linuxcnc.org/">LinuxCNC</a> to send status
 627 information to the MQTT broker IBM Bluemix.  As I also use MQTT for
 628 graphing, it occured to me that a generic MQTT LinuxCNC component
 629 would be useful and I set out to implement it.  Today I got the first
 630 draft limping along and submitted as
 631 <a href="https://github.com/LinuxCNC/linuxcnc/pull/2253">a patch to the
 632 LinuxCNC project</a>.</p>
 633
 634 <p>The simple part was setting up the MQTT publishing code in Python.
 635 I already have set up other parts submitting data to my Mosquito MQTT
 636 broker, so I could reuse that code.  Writing a LinuxCNC component in
 637 Python as new to me, but using existing examples in the code
 638 repository and the extensive documentation, this was fairly straight
 639 forward.  The hardest part was creating a automated test for the
 640 component to ensure it was working.  Testing it in a simulated
 641 LinuxCNC machine proved very useful, as I discovered features I needed
 642 that I had not thought of yet, and adjusted the code quite a bit to
 643 make it easier to test without a operational MQTT broker
 644 available.</p>
 645
 646 <p>The draft is ready and working, but I am unsure which LinuxCNC HAL
 647 pins I should collect and publish by default (in other words, the
 648 default set of information pieces published), and how to get the
 649 machine name from the LinuxCNC INI file.  The latter is a minor
 650 detail, but I expect it would be useful in a setup with several
 651 machines available.  I am hoping for feedback from the experienced
 652 LinuxCNC developers and users, to make the component even better
 653 before it can go into the mainland LinuxCNC code base.</p>
 654
 655 <p>Since I started on the MQTT component, I came across
 656 <a href="https://yewtu.be/watch?v=Bqa2grG0XtA">another video from Kent
 657 VanderVelden</a> where he combine LinuxCNC with a set of screen glasses
 658 controlled by a Raspberry Pi, and it occured to me that it would
 659 be useful for such use cases if LinuxCNC also provided a REST API for
 660 querying its status.  I hope to start on such component once the MQTT
 661 component is working well.</p>
 662
 663 <p>As usual, if you use Bitcoin and want to show your support of my
 664 activities, please send Bitcoin donations to my address
 665 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 666 </div>
 667       <div class="tags">
 668
 669
 670         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>.
 671
 672
 673       </div>
 674     </div>
 675     <div class="padding"></div>
 676
 677     <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>
 678     <div id="sidebar">
 679
 680
 681
 682 <h2>Archive</h2>
 683 <ul>
 684
 685 <li>2023
 686 <ul>
 687
 688 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/01/">January (3)</a></li>
 689
 690 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/02/">February (1)</a></li>
 691
 692 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/04/">April (2)</a></li>
 693
 694 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/05/">May (3)</a></li>
 695
 696 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/06/">June (1)</a></li>
 697
 698 </ul></li>
 699
 700 <li>2022
 701 <ul>
 702
 703 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/02/">February (1)</a></li>
 704
 705 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/03/">March (3)</a></li>
 706
 707 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/04/">April (2)</a></li>
 708
 709 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/06/">June (2)</a></li>
 710
 711 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/07/">July (1)</a></li>
 712
 713 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/09/">September (1)</a></li>
 714
 715 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/10/">October (1)</a></li>
 716
 717 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/12/">December (1)</a></li>
 718
 719 </ul></li>
 720
 721 <li>2021
 722 <ul>
 723
 724 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/01/">January (2)</a></li>
 725
 726 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/02/">February (1)</a></li>
 727
 728 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/05/">May (1)</a></li>
 729
 730 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/06/">June (1)</a></li>
 731
 732 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/07/">July (3)</a></li>
 733
 734 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/08/">August (1)</a></li>
 735
 736 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/09/">September (1)</a></li>
 737
 738 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/10/">October (1)</a></li>
 739
 740 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/12/">December (1)</a></li>
 741
 742 </ul></li>
 743
 744 <li>2020
 745 <ul>
 746
 747 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 748
 749 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 750
 751 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 752
 753 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/05/">May (3)</a></li>
 754
 755 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/06/">June (2)</a></li>
 756
 757 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/07/">July (1)</a></li>
 758
 759 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/09/">September (1)</a></li>
 760
 761 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/10/">October (1)</a></li>
 762
 763 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/11/">November (1)</a></li>
 764
 765 </ul></li>
 766
 767 <li>2019
 768 <ul>
 769
 770 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 771
 772 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 773
 774 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 775
 776 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 777
 778 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 779
 780 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 781
 782 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 783
 784 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 785
 786 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 787
 788 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 789
 790 </ul></li>
 791
 792 <li>2018
 793 <ul>
 794
 795 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 796
 797 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 798
 799 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 800
 801 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 802
 803 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 804
 805 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 806
 807 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 808
 809 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 810
 811 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 812
 813 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 814
 815 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 816
 817 </ul></li>
 818
 819 <li>2017
 820 <ul>
 821
 822 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 823
 824 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 825
 826 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 827
 828 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 829
 830 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 831
 832 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 833
 834 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 835
 836 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 837
 838 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 839
 840 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 841
 842 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 843
 844 </ul></li>
 845
 846 <li>2016
 847 <ul>
 848
 849 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 850
 851 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 852
 853 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 854
 855 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 856
 857 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 858
 859 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 860
 861 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 862
 863 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 864
 865 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 866
 867 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 868
 869 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 870
 871 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 872
 873 </ul></li>
 874
 875 <li>2015
 876 <ul>
 877
 878 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 879
 880 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 881
 882 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 883
 884 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 885
 886 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 887
 888 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 889
 890 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 891
 892 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 893
 894 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 895
 896 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 897
 898 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 899
 900 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 901
 902 </ul></li>
 903
 904 <li>2014
 905 <ul>
 906
 907 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 908
 909 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 910
 911 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 912
 913 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 914
 915 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 916
 917 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 918
 919 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 920
 921 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 922
 923 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 924
 925 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 926
 927 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 928
 929 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 930
 931 </ul></li>
 932
 933 <li>2013
 934 <ul>
 935
 936 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 937
 938 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 939
 940 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 941
 942 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 943
 944 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 945
 946 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 947
 948 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 949
 950 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 951
 952 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 953
 954 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 955
 956 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 957
 958 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 959
 960 </ul></li>
 961
 962 <li>2012
 963 <ul>
 964
 965 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 966
 967 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 968
 969 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 970
 971 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 972
 973 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 974
 975 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 976
 977 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 978
 979 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 980
 981 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 982
 983 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 984
 985 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 986
 987 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 988
 989 </ul></li>
 990
 991 <li>2011
 992 <ul>
 993
 994 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 995
 996 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 997
 998 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 999
1000 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1001
1002 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1003
1004 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1005
1006 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1007
1008 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1009
1010 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1011
1012 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1013
1014 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1015
1016 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1017
1018 </ul></li>
1019
1020 <li>2010
1021 <ul>
1022
1023 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1024
1025 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1026
1027 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1028
1029 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1030
1031 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1032
1033 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1034
1035 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1036
1037 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1038
1039 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1040
1041 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1042
1043 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1044
1045 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1046
1047 </ul></li>
1048
1049 <li>2009
1050 <ul>
1051
1052 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1053
1054 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1055
1056 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1057
1058 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1059
1060 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1061
1062 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1063
1064 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1065
1066 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1067
1068 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1069
1070 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1071
1072 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1073
1074 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1075
1076 </ul></li>
1077
1078 <li>2008
1079 <ul>
1080
1081 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1082
1083 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1084
1085 </ul></li>
1086
1087 </ul>
1088
1089
1090
1091 <h2>Tags</h2>
1092 <ul>
1093
1094  <li><a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (19)</a></li>
1095
1096  <li><a href="https://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1097
1098  <li><a href="https://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1099
1100  <li><a href="https://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1101
1102  <li><a href="https://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (9)</a></li>
1103
1104  <li><a href="https://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (12)</a></li>
1105
1106  <li><a href="https://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
1107
1108  <li><a href="https://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1109
1110  <li><a href="https://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1111
1112  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian">debian (194)</a></li>
1113
1114  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (159)</a></li>
1115
1116  <li><a href="https://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (9)</a></li>
1117
1118  <li><a href="https://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
1119
1120  <li><a href="https://people.skolelinux.org/pere/blog/tags/dld">dld (18)</a></li>
1121
1122  <li><a href="https://people.skolelinux.org/pere/blog/tags/docbook">docbook (30)</a></li>
1123
1124  <li><a href="https://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1125
1126  <li><a href="https://people.skolelinux.org/pere/blog/tags/english">english (450)</a></li>
1127
1128  <li><a href="https://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1129
1130  <li><a href="https://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
1131
1132  <li><a href="https://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (34)</a></li>
1133
1134  <li><a href="https://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1135
1136  <li><a href="https://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
1137
1138  <li><a href="https://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1139
1140  <li><a href="https://people.skolelinux.org/pere/blog/tags/intervju">intervju (43)</a></li>
1141
1142  <li><a href="https://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
1143
1144  <li><a href="https://people.skolelinux.org/pere/blog/tags/kart">kart (23)</a></li>
1145
1146  <li><a href="https://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
1147
1148  <li><a href="https://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1149
1150  <li><a href="https://people.skolelinux.org/pere/blog/tags/lego">lego (5)</a></li>
1151
1152  <li><a href="https://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1153
1154  <li><a href="https://people.skolelinux.org/pere/blog/tags/linuxcnc">linuxcnc (5)</a></li>
1155
1156  <li><a href="https://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1157
1158  <li><a href="https://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1159
1160  <li><a href="https://people.skolelinux.org/pere/blog/tags/madewithcc">madewithcc (3)</a></li>
1161
1162  <li><a href="https://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1163
1164  <li><a href="https://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (45)</a></li>
1165
1166  <li><a href="https://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (15)</a></li>
1167
1168  <li><a href="https://people.skolelinux.org/pere/blog/tags/noark5">noark5 (23)</a></li>
1169
1170  <li><a href="https://people.skolelinux.org/pere/blog/tags/norsk">norsk (320)</a></li>
1171
1172  <li><a href="https://people.skolelinux.org/pere/blog/tags/nuug">nuug (198)</a></li>
1173
1174  <li><a href="https://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (40)</a></li>
1175
1176  <li><a href="https://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1177
1178  <li><a href="https://people.skolelinux.org/pere/blog/tags/opensnitch">opensnitch (4)</a></li>
1179
1180  <li><a href="https://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (75)</a></li>
1181
1182  <li><a href="https://people.skolelinux.org/pere/blog/tags/personvern">personvern (114)</a></li>
1183
1184  <li><a href="https://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1185
1186  <li><a href="https://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1187
1188  <li><a href="https://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1189
1190  <li><a href="https://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1191
1192  <li><a href="https://people.skolelinux.org/pere/blog/tags/robot">robot (17)</a></li>
1193
1194  <li><a href="https://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1195
1196  <li><a href="https://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
1197
1198  <li><a href="https://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1199
1200  <li><a href="https://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (59)</a></li>
1201
1202  <li><a href="https://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1203
1204  <li><a href="https://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1205
1206  <li><a href="https://people.skolelinux.org/pere/blog/tags/standard">standard (74)</a></li>
1207
1208  <li><a href="https://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (7)</a></li>
1209
1210  <li><a href="https://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (14)</a></li>
1211
1212  <li><a href="https://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (64)</a></li>
1213
1214  <li><a href="https://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (5)</a></li>
1215
1216  <li><a href="https://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1217
1218  <li><a href="https://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1219
1220  <li><a href="https://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (20)</a></li>
1221
1222  <li><a href="https://people.skolelinux.org/pere/blog/tags/video">video (78)</a></li>
1223
1224  <li><a href="https://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1225
1226  <li><a href="https://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
1227
1228 </ul>
1229
1230
1231     </div>
1232     <p style="text-align: right">
1233  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1234 </p>
1235
1236   </body>
1237 </html>