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  13  <h1>
  14      <a href="http://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="http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html">Time for an official MIME type for patches?</a></div>
  24       <div class="date"> 1st November 2018</div>
  25       <div class="body"><p>As part of my involvement in
  26 <a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core">the Nikita
  27 archive API project</a>, I've been importing a fairly large lump of
  28 emails into a test instance of the archive to see how well this would
  29 go.  I picked a subset of <a href="https://notmuchmail.org/">my
  30 notmuch email database</a>, all public emails sent to me via
  31 @lists.debian.org, giving me a set of around 216 000 emails to import.
  32 In the process, I had a look at the various attachments included in
  33 these emails, to figure out what to do with attachments, and noticed
  34 that one of the most common attachment formats do not have
  35 <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">an
  36 official MIME type</a> registered with IANA/IETF.  The output from
  37 diff, ie the input for patch, is on the top 10 list of formats
  38 included in these emails.  At the moment people seem to use either
  39 text/x-patch or text/x-diff, but neither is officially registered.  It
  40 would be better if one official MIME type were registered and used
  41 everywhere.</p>
  42
  43 <p>To try to get one official MIME type for these files, I've brought
  44 up the topic on
  45 <a href="https://www.ietf.org/mailman/listinfo/media-types">the
  46 media-types mailing list</a>.  If you are interested in discussion
  47 which MIME type to use as the official for patch files, or involved in
  48 making software using a MIME type for patches, perhaps you would like
  49 to join the discussion?</p>
  50
  51 <p>As usual, if you use Bitcoin and want to show your support of my
  52 activities, please send Bitcoin donations to my address
  53 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  54 </div>
  55       <div class="tags">
  56
  57
  58         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>.
  59
  60
  61       </div>
  62     </div>
  63     <div class="padding"></div>
  64
  65     <div class="entry">
  66       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html">Measuring the speaker frequency response using the AUDMES free software GUI - nice free software</a></div>
  67       <div class="date">22nd October 2018</div>
  68       <div class="body"><p><img src="http://people.skolelinux.org/pere/blog/images/2018-10-22-audmes-measure-speakers.png" align="right" width="40%"/></p>
  69
  70 <p>My current home stereo is a patchwork of various pieces I got on
  71 flee markeds over the years.  It is amazing what kind of equipment
  72 show up there.  I've been wondering for a while if it was possible to
  73 measure how well this equipment is working together, and decided to
  74 see how far I could get using free software.  After trawling the web I
  75 came across an article from DIY Audio and Video on
  76 <a href="https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/">Speaker
  77 Testing and Analysis</a> describing how to test speakers, and it listing
  78 several software options, among them
  79 <a href="https://sourceforge.net/projects/audmes/">AUDio MEasurement
  80 System (AUDMES)</a>.  It is the only free software system I could find
  81 focusing on measuring speakers and audio frequency response.  In the
  82 process I also found an interesting article from NOVO on
  83 <a href="http://novo.press/understanding-speaker-specifications-and-frequency-response/">Understanding
  84 Speaker Specifications and Frequency Response</a> and an article from
  85 ecoustics on
  86 <a href="https://www.ecoustics.com/articles/understanding-speaker-frequency-response/">Understanding
  87 Speaker Frequency Response</a>, with a lot of information on what to
  88 look for and how to interpret the graphs.  Armed with this knowledge,
  89 I set out to measure the state of my speakers.</p>
  90
  91 <p>The first hurdle was that AUDMES hadn't seen a commit for 10 years
  92 and did not build with current compilers and libraries.  I got in
  93 touch with its author, who no longer was spending time on the program
  94 but gave me write access to the subversion repository on Sourceforge.
  95 The end result is that now the code build on Linux and is capable of
  96 saving and loading the collected frequency response data in CSV
  97 format.  The application is quite nice and flexible, and I was able to
  98 select the input and output audio interfaces independently.  This made
  99 it possible to use a USB mixer as the input source, while sending
 100 output via my laptop headphone connection.  I lacked the hardware and
 101 cabling to figure out a different way to get independent cabling to
 102 speakers and microphone.</p>
 103
 104 <p>Using this setup I could see how a large range of high frequencies
 105 apparently were not making it out of my speakers.  The picture show
 106 the frequency response measurement of one of the speakers.  Note the
 107 frequency lines seem to be slightly misaligned, compared to the CSV
 108 output from the program.  I can not hear several of these are high
 109 frequencies, according to measurement from
 110 <a href="http://freehearingtestsoftware.com">Free Hearing Test
 111 Software</a>, an freeware system to measure your hearing (still
 112 looking for a free software alternative), so I do not know if they are
 113 coming out out the speakers.  I thus do not quite know how to figure
 114 out if the missing frequencies is a problem with the microphone, the
 115 amplifier or the speakers, but I managed to rule out the audio card in my
 116 PC by measuring my Bose noise canceling headset using its own
 117 microphone.  This setup was able to see the high frequency tones, so
 118 the problem with my stereo had to be in the amplifier or speakers.</p>
 119
 120 <p>Anyway, to try to role out one factor I ended up picking up a new
 121 set of speakers at a flee marked, and these work a lot better than the
 122 old speakers, so I guess the microphone and amplifier is OK.  If you
 123 need to measure your own speakers, check out AUDMES.  If more people
 124 get involved, perhaps the project could become good enough to
 125 <a href="https://bugs.debian.org/910876">include in Debian</a>?  And if
 126 you know of some other free software to measure speakers and amplifier
 127 performance, please let me know.  I am aware of the freeware option
 128 <a href="https://www.roomeqwizard.com/">REW</a>, but I want something
 129 that can be developed also when the vendor looses interest.</p>
 130
 131 <p>As usual, if you use Bitcoin and want to show your support of my
 132 activities, please send Bitcoin donations to my address
 133 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 134 </div>
 135       <div class="tags">
 136
 137
 138         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software</a>.
 139
 140
 141       </div>
 142     </div>
 143     <div class="padding"></div>
 144
 145     <div class="entry">
 146       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html">Web browser integration of VLC with Bittorrent support</a></div>
 147       <div class="date">21st October 2018</div>
 148       <div class="body"><p>Bittorrent is as far as I know, currently the most efficient way to
 149 distribute content on the Internet.  It is used all by all sorts of
 150 content providers, from national TV stations like
 151 <a href="https://www.nrk.no/">NRK</a>, Linux distributors like
 152 <a href="https://www.debian.org/">Debian</a> and
 153 <a href="https://www.ubuntu.com/">Ubuntu</a>, and of course the
 154 <a href="https://archive.org/">Internet archive</A>.
 155
 156 <p>Almost a month ago
 157 <a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">a new
 158 package adding Bittorrent support to VLC</a> became available in
 159 Debian testing and unstable.  To test it, simply install it like
 160 this:</p>
 161
 162 <p><pre>
 163 apt install vlc-plugin-bittorrent
 164 </pre></p>
 165
 166 <p>Since the plugin was made available for the first time in Debian,
 167 several improvements have been made to it.  In version 2.2-4, now
 168 available in both testing and unstable, a desktop file is provided to
 169 teach browsers to start VLC when the user click on torrent files or
 170 magnet links.  The last part is thanks to me finally understanding
 171 what the strange x-scheme-handler style MIME types in desktop files
 172 are used for.  By adding x-scheme-handler/magnet to the MimeType entry
 173 in the desktop file, at least the browsers Firefox and Chromium will
 174 suggest to start VLC when selecting a magnet URI on a web page.  The
 175 end result is that now, with the plugin installed in Buster and Sid,
 176 one can visit any
 177 <a href="https://archive.org/details/CopyingIsNotTheft1080p">Internet
 178 Archive page with movies</a> using a web browser and click on the
 179 torrent link to start streaming the movie.</p>
 180
 181 <p>Note, there is still some misfeatures in the plugin.  One is the
 182 fact that it will hang and
 183 <a href="https://github.com/johang/vlc-bittorrent/issues/13">block VLC
 184 from exiting until the torrent streaming starts</a>.  Another is the
 185 fact that it
 186 <a href="https://github.com/johang/vlc-bittorrent/issues/9">will pick
 187 and play a random file in a multi file torrent</a>.  This is not
 188 always the video file you want.  Combined with the first it can be a
 189 bit hard to get the video streaming going.  But when it work, it seem
 190 to do a good job.</p>
 191
 192 <p>For the Debian packaging, I would love to find a good way to test
 193 if the plugin work with VLC using autopkgtest.  I tried, but do not
 194 know enough of the inner workings of VLC to get it working.  For now
 195 the autopkgtest script is only checking if the .so file was
 196 successfully loaded by VLC.  If you have any suggestions, please
 197 submit a patch to the Debian bug tracking system.</p>
 198
 199 <p>As usual, if you use Bitcoin and want to show your support of my
 200 activities, please send Bitcoin donations to my address
 201 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 202 </div>
 203       <div class="tags">
 204
 205
 206         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 207
 208
 209       </div>
 210     </div>
 211     <div class="padding"></div>
 212
 213     <div class="entry">
 214       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html">Release 0.2 of free software archive system Nikita announced</a></div>
 215       <div class="date">18th October 2018</div>
 216       <div class="body"><p>This morning, the new release of the
 217 <a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core/">Nikita
 218 Noark 5 core project</a> was
 219 <a href="https://lists.nuug.no/pipermail/nikita-noark/2018-October/000406.html">announced
 220 on the project mailing list</a>.  The free software solution is an
 221 implementation of the Norwegian archive standard Noark 5 used by
 222 government offices in Norway.  These were the changes in version 0.2
 223 since version 0.1.1 (from NEWS.md):
 224
 225 <ul>
 226   <li>Fix typos in REL names</li>
 227   <li>Tidy up error message reporting</li>
 228   <li>Fix issue where we used Integer.valueOf(), not Integer.getInteger()</li>
 229   <li>Change some String handling to StringBuffer</li>
 230   <li>Fix error reporting</li>
 231   <li>Code tidy-up</li>
 232   <li>Fix issue using static non-synchronized SimpleDateFormat to avoid
 233       race conditions</li>
 234   <li>Fix problem where deserialisers were treating integers as strings</li>
 235   <li>Update methods to make them null-safe</li>
 236   <li>Fix many issues reported by coverity</li>
 237   <li>Improve equals(), compareTo() and hash() in domain model</li>
 238   <li>Improvements to the domain model for metadata classes</li>
 239   <li>Fix CORS issues when downloading document</li>
 240   <li>Implementation of case-handling with registryEntry and document upload</li>
 241   <li>Better support in Javascript for OPTIONS</li>
 242   <li>Adding concept description of mail integration</li>
 243   <li>Improve setting of default values for GET on ny-journalpost</li>
 244   <li>Better handling of required values during deserialisation </li>
 245   <li>Changed tilknyttetDato (M620) from date to dateTime</li>
 246   <li>Corrected some opprettetDato (M600) (de)serialisation errors.</li>
 247   <li>Improve parse error reporting.</li>
 248   <li>Started on OData search and filtering.</li>
 249   <li>Added Contributor Covenant Code of Conduct to project.</li>
 250   <li>Moved repository and project from Github to Gitlab.</li>
 251   <li>Restructured repository, moved code into src/ and web/.</li>
 252   <li>Updated code to use Spring Boot version 2.</li>
 253   <li>Added support for OAuth2 authentication.</li>
 254   <li>Fixed several bugs discovered by Coverity.</li>
 255   <li>Corrected handling of date/datetime fields.</li>
 256   <li>Improved error reporting when rejecting during deserializatoin.</li>
 257   <li>Adjusted default values provided for ny-arkivdel, ny-mappe,
 258    ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.</li>
 259   <li>Several fixes for korrespondansepart*.</li>
 260   <li>Updated web GUI:
 261      <ul>
 262        <li>Now handle both file upload and download.</li>
 263        <li>Uses new OAuth2 authentication for login.</li>
 264        <li>Forms now fetches default values from API using GET.</li>
 265        <li>Added RFC 822 (email), TIFF and JPEG to list of possible file formats.</li>
 266      </ul></li>
 267 </ul>
 268
 269 <p>The changes and improvements are extensive.  Running diffstat on
 270 the changes between git tab 0.1.1 and 0.2 show 1098 files changed,
 271 108666 insertions(+), 54066 deletions(-).</p>
 272
 273 <p>If free and open standardized archiving API sound interesting to
 274 you, please contact us on IRC
 275 (<a href="irc://irc.freenode.net/%23nikita">#nikita on
 276 irc.freenode.net</a>) or email
 277 (<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">nikita-noark
 278 mailing list</a>).</p>
 279
 280 <p>As usual, if you use Bitcoin and want to show your support of my
 281 activities, please send Bitcoin donations to my address
 282 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 283 </div>
 284       <div class="tags">
 285
 286
 287         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>, <a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>.
 288
 289
 290       </div>
 291     </div>
 292     <div class="padding"></div>
 293
 294     <div class="entry">
 295       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Fetching_trusted_timestamps_using_the_rfc3161ng_python_module.html">Fetching trusted timestamps using the rfc3161ng python module</a></div>
 296       <div class="date"> 8th October 2018</div>
 297       <div class="body"><p>I have  earlier covered the basics of trusted timestamping using the
 298 'openssl ts' client.  See blog post for
 299 <a href="http://people.skolelinux.org/pere/blog/Public_Trusted_Timestamping_services_for_everyone.html">2014</a>,
 300 <a href="http://people.skolelinux.org/pere/blog/syslog_trusted_timestamp___chain_of_trusted_timestamps_for_your_syslog.html">2016</a>
 301 and
 302 <a href="http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html">2017</a>
 303 for those stories.  But some times I want to integrate the timestamping
 304 in other code, and recently I needed to integrate it into Python.
 305 After searching a bit, I found
 306 <a href="https://dev.entrouvert.org/projects/python-rfc3161">the
 307 rfc3161 library</a> which seemed like a good fit, but I soon
 308 discovered it only worked for python version 2, and I needed something
 309 that work with python version 3.  Luckily I next came across
 310 <a href="https://github.com/trbs/rfc3161ng/">the rfc3161ng library</a>,
 311 a fork of the original rfc3161 library.  Not only is it working with
 312 python 3, it have fixed a few of the bugs in the original library, and
 313 it has an active maintainer.  I decided to wrap it up and make it
 314 <a href="https://tracker.debian.org/pkg/python-rfc3161ng">available in
 315 Debian</a>, and a few days ago it entered Debian unstable and testing.</p>
 316
 317 <p>Using the library is fairly straight forward.  The only slightly
 318 problematic step is to fetch the required certificates to verify the
 319 timestamp.  For some services it is straight forward, while for others
 320 I have not yet figured out how to do it.  Here is a small standalone
 321 code example based on of the integration tests in the library code:</p>
 322
 323 <pre>
 324 #!/usr/bin/python3
 325
 326 """
 327
 328 Python 3 script demonstrating how to use the rfc3161ng module to
 329 get trusted timestamps.
 330
 331 The license of this code is the same as the license of the rfc3161ng
 332 library, ie MIT/BSD.
 333
 334 """
 335
 336 import os
 337 import pyasn1.codec.der
 338 import rfc3161ng
 339 import subprocess
 340 import tempfile
 341 import urllib.request
 342
 343 def store(f, data):
 344     f.write(data)
 345     f.flush()
 346     f.seek(0)
 347
 348 def fetch(url, f=None):
 349     response = urllib.request.urlopen(url)
 350     data = response.read()
 351     if f:
 352         store(f, data)
 353     return data
 354
 355 def main():
 356     with tempfile.NamedTemporaryFile() as cert_f,\
 357          tempfile.NamedTemporaryFile() as ca_f,\
 358          tempfile.NamedTemporaryFile() as msg_f,\
 359          tempfile.NamedTemporaryFile() as tsr_f:
 360
 361         # First fetch certificates used by service
 362         certificate_data = fetch('https://freetsa.org/files/tsa.crt', cert_f)
 363         ca_data_data = fetch('https://freetsa.org/files/cacert.pem', ca_f)
 364
 365         # Then timestamp the message
 366         timestamper = \
 367             rfc3161ng.RemoteTimestamper('http://freetsa.org/tsr',
 368                                         certificate=certificate_data)
 369         data = b"Python forever!\n"
 370         tsr = timestamper(data=data, return_tsr=True)
 371
 372         # Finally, convert message and response to something 'openssl ts' can verify
 373         store(msg_f, data)
 374         store(tsr_f, pyasn1.codec.der.encoder.encode(tsr))
 375         args = ["openssl", "ts", "-verify",
 376                 "-data", msg_f.name,
 377                 "-in", tsr_f.name,
 378                 "-CAfile", ca_f.name,
 379                 "-untrusted", cert_f.name]
 380         subprocess.check_call(args)
 381
 382 if '__main__' == __name__:
 383    main()
 384 </pre>
 385
 386 <p>The code fetches the required certificates, store them as temporary
 387 files, timestamp a simple message, store the message and timestamp to
 388 disk and ask 'openssl ts' to verify the timestamp.  A timestamp is
 389 around 1.5 kiB in size, and should be fairly easy to store for future
 390 use.</p>
 391
 392 <p>As usual, if you use Bitcoin and want to show your support of my
 393 activities, please send Bitcoin donations to my address
 394 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 395 </div>
 396       <div class="tags">
 397
 398
 399         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet</a>.
 400
 401
 402       </div>
 403     </div>
 404     <div class="padding"></div>
 405
 406     <div class="entry">
 407       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Automatic_Google_Drive_sync_using_grive_in_Debian.html">Automatic Google Drive sync using grive in Debian</a></div>
 408       <div class="date"> 4th October 2018</div>
 409       <div class="body"><p>A few days, I rescued a Windows victim over to Debian.  To try to
 410 rescue the remains, I helped set up automatic sync with Google Drive.
 411 I did not find any sensible Debian package handling this
 412 automatically, so I rebuild the grive2 source from
 413 <a href="http://www.webupd8.org/">the Ubuntu UPD8 PPA</a> to do the
 414 task and added a autostart desktop entry and a small shell script to
 415 run in the background while the user is logged in to do the sync.
 416 Here is a sketch of the setup for future reference.</p>
 417
 418 <p>I first created <tt>~/googledrive</tt>, entered the directory and
 419 ran '<tt>grive -a</tt>' to authenticate the machine/user.  Next, I
 420 created a autostart hook in <tt>~/.config/autostart/grive.desktop</tt>
 421 to start the sync when the user log in:</p>
 422
 423 <p><blockquote><pre>
 424 [Desktop Entry]
 425 Name=Google drive autosync
 426 Type=Application
 427 Exec=/home/user/bin/grive-sync
 428 </pre></blockquote></p>
 429
 430 <p>Finally, I wrote the <tt>~/bin/grive-sync</tt> script to sync
 431 ~/googledrive/ with the files in Google Drive.</p>
 432
 433 <p><blockquote><pre>
 434 #!/bin/sh
 435 set -e
 436 cd ~/
 437 cleanup() {
 438     if [ "$syncpid" ] ; then
 439         kill $syncpid
 440     fi
 441 }
 442 trap cleanup EXIT INT QUIT
 443 /usr/lib/grive/grive-sync.sh listen googledrive 2>&1 | sed "s%^%$0:%" &
 444 syncpdi=$!
 445 while true; do
 446     if ! xhost >/dev/null 2>&1 ; then
 447         echo "no DISPLAY, exiting as the user probably logged out"
 448         exit 1
 449     fi
 450     if [ ! -e /run/user/1000/grive-sync.sh_googledrive ] ; then
 451         /usr/lib/grive/grive-sync.sh sync googledrive
 452     fi
 453     sleep 300
 454 done 2>&1 | sed "s%^%$0:%"
 455 </pre></blockquote></p>
 456
 457 <p>Feel free to use the setup if you want.  It can be assumed to be
 458 GNU GPL v2 licensed (or any later version, at your leisure), but I
 459 doubt this code is possible to claim copyright on.</p>
 460
 461 <p>As usual, if you use Bitcoin and want to show your support of my
 462 activities, please send Bitcoin donations to my address
 463 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 464 </div>
 465       <div class="tags">
 466
 467
 468         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 469
 470
 471       </div>
 472     </div>
 473     <div class="padding"></div>
 474
 475     <div class="entry">
 476       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html">Valutakrambod - A python and bitcoin love story</a></div>
 477       <div class="date">29th September 2018</div>
 478       <div class="body"><p>It would come as no surprise to anyone that I am interested in
 479 bitcoins and virtual currencies.  I've been keeping an eye on virtual
 480 currencies for many years, and it is part of the reason a few months
 481 ago, I started writing a python library for collecting currency
 482 exchange rates and trade on virtual currency exchanges.  I decided to
 483 name the end result valutakrambod, which perhaps can be translated to
 484 small currency shop.</p>
 485
 486 <p>The library uses the tornado python library to handle HTTP and
 487 websocket connections, and provide a asynchronous system for
 488 connecting to and tracking several services.  The code is available
 489 from
 490 <a href="http://github.com/petterreinholdtsen/valutakrambod">github</a>.</p>
 491
 492 </p>There are two example clients of the library.  One is very simple and
 493 list every updated buy/sell price received from the various services.
 494 This code is started by running bin/btc-rates and call the client code
 495 in valutakrambod/client.py.  The simple client look like this:</p>
 496
 497 <p><blockquote><pre>
 498 import functools
 499 import tornado.ioloop
 500 import valutakrambod
 501 class SimpleClient(object):
 502     def __init__(self):
 503         self.services = []
 504         self.streams = []
 505         pass
 506     def newdata(self, service, pair, changed):
 507         print("%-15s %s-%s: %8.3f %8.3f" % (
 508             service.servicename(),
 509             pair[0],
 510             pair[1],
 511             service.rates[pair]['ask'],
 512             service.rates[pair]['bid'])
 513         )
 514     async def refresh(self, service):
 515         await service.fetchRates(service.wantedpairs)
 516     def run(self):
 517         self.ioloop = tornado.ioloop.IOLoop.current()
 518         self.services = valutakrambod.service.knownServices()
 519         for e in self.services:
 520             service = e()
 521             service.subscribe(self.newdata)
 522             stream = service.websocket()
 523             if stream:
 524                 self.streams.append(stream)
 525             else:
 526                 # Fetch information from non-streaming services immediately
 527                 self.ioloop.call_later(len(self.services),
 528                                        functools.partial(self.refresh, service))
 529                 # as well as regularly
 530                 service.periodicUpdate(60)
 531         for stream in self.streams:
 532             stream.connect()
 533         try:
 534             self.ioloop.start()
 535         except KeyboardInterrupt:
 536             print("Interrupted by keyboard, closing all connections.")
 537             pass
 538         for stream in self.streams:
 539             stream.close()
 540 </pre></blockquote></p>
 541
 542 <p>The library client loops over all known "public" services,
 543 initialises it, subscribes to any updates from the service, checks and
 544 activates websocket streaming if the service provide it, and if no
 545 streaming is supported, fetches information from the service and sets
 546 up a periodic update every 60 seconds.  The output from this client
 547 can look like this:</p>
 548
 549 <p><blockquote><pre>
 550 Bl3p            BTC-EUR: 5687.110 5653.690
 551 Bl3p            BTC-EUR: 5687.110 5653.690
 552 Bl3p            BTC-EUR: 5687.110 5653.690
 553 Hitbtc          BTC-USD: 6594.560 6593.690
 554 Hitbtc          BTC-USD: 6594.560 6593.690
 555 Bl3p            BTC-EUR: 5687.110 5653.690
 556 Hitbtc          BTC-USD: 6594.570 6593.690
 557 Bitstamp        EUR-USD:    1.159    1.154
 558 Hitbtc          BTC-USD: 6594.570 6593.690
 559 Hitbtc          BTC-USD: 6594.580 6593.690
 560 Hitbtc          BTC-USD: 6594.580 6593.690
 561 Hitbtc          BTC-USD: 6594.580 6593.690
 562 Bl3p            BTC-EUR: 5687.110 5653.690
 563 Paymium         BTC-EUR: 5680.000 5620.240
 564 </pre></blockquote></p>
 565
 566 <p>The exchange order book is tracked in addition to the best buy/sell
 567 price, for those that need to know the details.</p>
 568
 569 <p>The other example client is focusing on providing a curses view
 570 with updated buy/sell prices as soon as they are received from the
 571 services.  This code is located in bin/btc-rates-curses and activated
 572 by using the '-c' argument.  Without the argument the "curses" output
 573 is printed without using curses, which is useful for debugging.  The
 574 curses view look like this:</p>
 575
 576 <p><blockquote><pre>
 577            Name Pair   Bid         Ask         Spr    Ftcd    Age
 578  BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
 579        Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
 580         Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
 581          Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
 582        Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
 583            Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
 584        Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
 585          Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
 586         Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
 587  BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
 588         Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
 589          Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
 590        Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
 591         MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
 592  BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
 593        Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
 594          Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
 595        Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
 596        Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
 597          Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
 598          Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
 599          Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
 600   Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 601      Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 602        Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
 603   Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
 604  BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
 605  BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
 606  BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
 607      Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
 608 </pre></blockquote></p>
 609
 610 <p>The code for this client is too complex for a simple blog post, so
 611 you will have to check out the git repository to figure out how it
 612 work.  What I can tell is how the three last numbers on each line
 613 should be interpreted.  The first is how many seconds ago information
 614 was received from the service.  The second is how long ago, according
 615 to the service, the provided information was updated.  The last is an
 616 estimate on how often the buy/sell values change.</p>
 617
 618 <p>If you find this library useful, or would like to improve it, I
 619 would love to hear from you.  Note that for some of the services I've
 620 implemented a trading API.  It might be the topic of a future blog
 621 post.</p>
 622
 623 <p>As usual, if you use Bitcoin and want to show your support of my
 624 activities, please send Bitcoin donations to my address
 625 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 626 </div>
 627       <div class="tags">
 628
 629
 630         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 631
 632
 633       </div>
 634     </div>
 635     <div class="padding"></div>
 636
 637     <div class="entry">
 638       <div class="title"><a href="http://people.skolelinux.org/pere/blog/VLC_in_Debian_now_can_do_bittorrent_streaming.html">VLC in Debian now can do bittorrent streaming</a></div>
 639       <div class="date">24th September 2018</div>
 640       <div class="body"><p>Back in February, I got curious to see
 641 <a href="http://people.skolelinux.org/pere/blog/Using_VLC_to_stream_bittorrent_sources.html">if
 642 VLC now supported Bittorrent streaming</a>.  It did not, despite the
 643 fact that the idea and code to handle such streaming had been floating
 644 around for years.  I did however find
 645 <a href="https://github.com/johang/vlc-bittorrent">a standalone plugin
 646 for VLC</a> to do it, and half a year later I decided to wrap up the
 647 plugin and get it into Debian.  I uploaded it to NEW a few days ago,
 648 and am very happy to report that it
 649 <a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">entered
 650 Debian</a> a few hours ago, and should be available in Debian/Unstable
 651 tomorrow, and Debian/Testing in a few days.</p>
 652
 653 <p>With the vlc-plugin-bittorrent package installed you should be able
 654 to stream videos using a simple call to</p>
 655
 656 <p><blockquote><pre>
 657 vlc https://archive.org/download/TheGoat/TheGoat_archive.torrent
 658 </pre></blockquote></p>
 659
 660 </p>It can handle magnet links too.  Now if only native vlc had
 661 bittorrent support.  Then a lot more would be helping each other to
 662 share public domain and creative commons movies.  The plugin need some
 663 stability work with seeking and picking the right file in a torrent
 664 with many files, but is already usable.  Please note that the plugin
 665 is not removing downloaded files when vlc is stopped, so it can fill
 666 up your disk if you are not careful.  Have fun. :)</p>
 667
 668 <p>I would love to get help maintaining this package.  Get in touch if
 669 you are interested.</p>
 670
 671 <p>As usual, if you use Bitcoin and want to show your support of my
 672 activities, please send Bitcoin donations to my address
 673 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 674 </div>
 675       <div class="tags">
 676
 677
 678         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 679
 680
 681       </div>
 682     </div>
 683     <div class="padding"></div>
 684
 685     <div class="entry">
 686       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Using_the_Kodi_API_to_play_Youtube_videos.html">Using the Kodi API to play Youtube videos</a></div>
 687       <div class="date"> 2nd September 2018</div>
 688       <div class="body"><p>I continue to explore my Kodi installation, and today I wanted to
 689 tell it to play a youtube URL I received in a chat, without having to
 690 insert search terms using the on-screen keyboard.  After searching the
 691 web for API access to the Youtube plugin and testing a bit, I managed
 692 to find a recipe that worked.  If you got a kodi instance with its API
 693 available from http://kodihost/jsonrpc, you can try the following to
 694 have check out a nice cover band.</p>
 695
 696 <p><blockquote><pre>curl --silent --header 'Content-Type: application/json' \
 697   --data-binary '{ "id": 1, "jsonrpc": "2.0", "method": "Player.Open",
 698   "params": {"item": { "file":
 699   "plugin://plugin.video.youtube/play/?video_id=LuRGVM9O0qg" } } }' \
 700   http://projector.local/jsonrpc</pre></blockquote></p>
 701
 702 <p>I've extended kodi-stream program to take a video source as its
 703 first argument.  It can now handle direct video links, youtube links
 704 and 'desktop' to stream my desktop to Kodi.  It is almost like a
 705 Chromecast. :)</p>
 706
 707 <p>As usual, if you use Bitcoin and want to show your support of my
 708 activities, please send Bitcoin donations to my address
 709 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 710 </div>
 711       <div class="tags">
 712
 713
 714         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 715
 716
 717       </div>
 718     </div>
 719     <div class="padding"></div>
 720
 721     <div class="entry">
 722       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Software_created_using_taxpayers__money_should_be_Free_Software.html">Software created using taxpayers’ money should be Free Software</a></div>
 723       <div class="date">30th August 2018</div>
 724       <div class="body"><p>It might seem obvious that software created using tax money should
 725 be available for everyone to use and improve.  Free Software
 726 Foundation Europe recentlystarted a campaign to help get more people
 727 to understand this, and I just signed the petition on
 728 <a href="https://publiccode.eu/">Public Money, Public Code</a> to help
 729 them. I hope you too will do the same.</p>
 730 </div>
 731       <div class="tags">
 732
 733
 734         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</a>.
 735
 736
 737       </div>
 738     </div>
 739     <div class="padding"></div>
 740
 741     <p style="text-align: right;"><a href="index.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS feed" width="36" height="14" /></a></p>
 742     <div id="sidebar">
 743
 744
 745
 746 <h2>Archive</h2>
 747 <ul>
 748
 749 <li>2018
 750 <ul>
 751
 752 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 753
 754 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 755
 756 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 757
 758 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 759
 760 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 761
 762 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 763
 764 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 765
 766 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 767
 768 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 769
 770 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (1)</a></li>
 771
 772 </ul></li>
 773
 774 <li>2017
 775 <ul>
 776
 777 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 778
 779 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 780
 781 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 782
 783 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 784
 785 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 786
 787 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 788
 789 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 790
 791 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 792
 793 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 794
 795 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 796
 797 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 798
 799 </ul></li>
 800
 801 <li>2016
 802 <ul>
 803
 804 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 805
 806 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 807
 808 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 809
 810 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 811
 812 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 813
 814 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 815
 816 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 817
 818 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 819
 820 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 821
 822 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 823
 824 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 825
 826 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 827
 828 </ul></li>
 829
 830 <li>2015
 831 <ul>
 832
 833 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 834
 835 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 836
 837 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 838
 839 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 840
 841 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 842
 843 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 844
 845 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 846
 847 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 848
 849 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 850
 851 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 852
 853 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 854
 855 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 856
 857 </ul></li>
 858
 859 <li>2014
 860 <ul>
 861
 862 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 863
 864 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 865
 866 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 867
 868 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 869
 870 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 871
 872 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 873
 874 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 875
 876 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 877
 878 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 879
 880 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 881
 882 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 883
 884 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 885
 886 </ul></li>
 887
 888 <li>2013
 889 <ul>
 890
 891 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 892
 893 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 894
 895 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 896
 897 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 898
 899 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 900
 901 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 902
 903 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 904
 905 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 906
 907 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 908
 909 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 910
 911 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 912
 913 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 914
 915 </ul></li>
 916
 917 <li>2012
 918 <ul>
 919
 920 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 921
 922 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 923
 924 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 925
 926 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 927
 928 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 929
 930 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 931
 932 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 933
 934 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 935
 936 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 937
 938 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 939
 940 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 941
 942 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 943
 944 </ul></li>
 945
 946 <li>2011
 947 <ul>
 948
 949 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 950
 951 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 952
 953 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 954
 955 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 956
 957 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 958
 959 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 960
 961 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 962
 963 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 964
 965 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 966
 967 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 968
 969 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 970
 971 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 972
 973 </ul></li>
 974
 975 <li>2010
 976 <ul>
 977
 978 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 979
 980 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 981
 982 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 983
 984 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 985
 986 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 987
 988 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 989
 990 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 991
 992 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 993
 994 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 995
 996 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 997
 998 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 999
1000 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1001
1002 </ul></li>
1003
1004 <li>2009
1005 <ul>
1006
1007 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1008
1009 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1010
1011 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1012
1013 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1014
1015 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1016
1017 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1018
1019 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1020
1021 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1022
1023 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1024
1025 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1026
1027 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1028
1029 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1030
1031 </ul></li>
1032
1033 <li>2008
1034 <ul>
1035
1036 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1037
1038 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1039
1040 </ul></li>
1041
1042 </ul>
1043
1044
1045
1046 <h2>Tags</h2>
1047 <ul>
1048
1049  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
1050
1051  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1052
1053  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1054
1055  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1056
1057  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (10)</a></li>
1058
1059  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
1060
1061  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1062
1063  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1064
1065  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (164)</a></li>
1066
1067  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1068
1069  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1070
1071  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1072
1073  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1074
1075  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (25)</a></li>
1076
1077  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1078
1079  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (391)</a></li>
1080
1081  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1082
1083  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (13)</a></li>
1084
1085  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (32)</a></li>
1086
1087  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1088
1089  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1090
1091  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1092
1093  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1094
1095  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
1096
1097  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1098
1099  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (3)</a></li>
1100
1101  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1102
1103  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1104
1105  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1106
1107  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1108
1109  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1110
1111  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1112
1113  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (41)</a></li>
1114
1115  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (11)</a></li>
1116
1117  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (299)</a></li>
1118
1119  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (191)</a></li>
1120
1121  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (34)</a></li>
1122
1123  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1124
1125  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (72)</a></li>
1126
1127  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (107)</a></li>
1128
1129  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1130
1131  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1132
1133  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1134
1135  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1136
1137  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1138
1139  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1140
1141  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (6)</a></li>
1142
1143  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1144
1145  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (55)</a></li>
1146
1147  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1148
1149  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1150
1151  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (57)</a></li>
1152
1153  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1154
1155  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1156
1157  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (55)</a></li>
1158
1159  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1160
1161  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1162
1163  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1164
1165  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (13)</a></li>
1166
1167  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (69)</a></li>
1168
1169  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1170
1171  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (41)</a></li>
1172
1173 </ul>
1174
1175
1176     </div>
1177     <p style="text-align: right">
1178  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1179 </p>
1180
1181   </body>
1182 </html>