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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/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html">Retten til kontant betaling er en rettighet som må brukes for å beholdes</a></div>
  24       <div class="date">11th December 2018</div>
  25       <div class="body"><p><a href="https://www.fn.no/Om-FN/Avtaler/Menneskerettigheter/FNs-verdenserklaering-om-menneskerettigheter">FNs
  26 menneskerettighetserklæring</a> artikkel 13 første punkt lyder som
  27 følger:</p>
  28
  29 <p><blockquote>
  30 Enhver har rett til å bevege seg fritt og til fritt å velge
  31 oppholdssted innenfor en stats grenser.
  32 </blockquote></p>
  33
  34 <p>Det er altså en menneskerett å kunne bevege seg fritt i landet.
  35 For å bevege seg fritt i landet, så må en kunne bevege seg uten å bli
  36 sporet.  Det vil i dagens samfunn innebære å bevege seg uten å legge
  37 igjen digitale spor og uten å være radiomerket.  Hvis en vet at ens
  38 bevegelser, hvor en befinner seg når, og hvem som befinner seg i
  39 nærheten, blir samlet inn og gjort tilgjengelig for fremmede, det være
  40 seg myndighetene eller private organisasjoner, så kan en ikke lenger
  41 bevege seg fritt.  Dette gjør at det er en forutsetning for å ha glede
  42 av retten til å bevege seg fritt i landet at en motstår fristelsen til
  43 å legge igjen digitale spor når en betaler for seg.  Rettigheter som
  44 ikke blir brukt, blit fjernet.  Den eneste måten i dag å unngå å legge
  45 igjen digitale spor når en betaler for seg, er å betale med kontanter,
  46 samt takke nei til å legge igjen navn og adresse (slik f.eks. Elkjøp
  47 ber om &mdash; jeg sier de kan legge inn 'anonym anonym' når
  48 datasystemet deres trenger et navn).  Personlig bruker jeg derfor
  49 konsekvent kontant betaling når jeg beveger meg rundt, for å bidra med
  50 mitt for å forsvare menneskerettighetene i Norge.  Kanskje noe også
  51 for deg?  Merk at det ikke er tilstrekkelig for å unngå sporing å
  52 betale med kontanter, men det er et lite steg i riktig retning.</p>
  53
  54 <p>Det er flere andre argumenter i tillegg til
  55 menneskerettighetsargumentet for å bruke kontanter.  I går hadde
  56 Dagbladet en utmerket kommentar av sin journalist John Olav Egeland om
  57 hvilket
  58 <a href="https://www.dagbladet.no/kultur/kontantlost-diktatur/70543434">kontantløst
  59 diktatur</a> som venter oss hvis mange nok slutter å insistere på å
  60 betale med kontanter.  Jeg anbefaler deg å lese den.</p>
  61
  62 <p>Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til
  63 det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner
  64 til min adresse
  65 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.
  66 Merk, betaling med bitcoin er ikke anonymt. :)</p>
  67 </div>
  68       <div class="tags">
  69
  70
  71         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>.
  72
  73
  74       </div>
  75     </div>
  76     <div class="padding"></div>
  77
  78     <div class="entry">
  79       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html">Why is your site not using Content Security Policy / CSP?</a></div>
  80       <div class="date"> 9th December 2018</div>
  81       <div class="body"><p>Yesterday, I had the pleasure of watching on Frikanalen the OWASP
  82 talk by Scott Helme titled
  83 "<a href="https://frikanalen.no/video/626080/">What We’ve Learned From
  84 Billions of Security Reports</a>".  I had not heard of the
  85 <a href="https://en.wikipedia.org/wiki/Content_Security_Policy">Content
  86 Security Policy standard</a> nor its ability to "call home" when a
  87 browser detect a policy breach (I do not follow web page design
  88 development much these days), and found the talk very illuminating.</p>
  89
  90 <p>The mechanism allow a web site owner to use HTTP headers to tell
  91 visitors web browser which sources (internal and external) are allowed to
  92 be used on the web site.  Thus it become possible to enforce a "only
  93 local content" policy despite web designers urge to fetch programs
  94 from random sites on the Internet, like the one
  95 <a href="https://securityaffairs.co/wordpress/68966/hacking/browsealoud-plugin-hack.html">enabling
  96 the attack</a> reported by Scott Helme earlier this year.</p>
  97
  98 <p>Using CSP seem like an obvious thing for a site admin to implement
  99 to take some control over the information leak that occur when
 100 external sources are used to render web pages, it is a mystery more
 101 sites are not using CSP?  It is being
 102 <a href="https://www.w3.org/TR/CSP/">standardized under W3C</a> these
 103 days, and is supposed by most web browsers</p>
 104
 105 <p>I managed to find <a href="https://github.com/mozilla/django-csp">a
 106 Django middleware for implementing CSP</a> and was happy to discover
 107 it was already in Debian.  I plan to use it to add CSP support to the
 108 Frikanalen web site soon.</p>
 109
 110 <p>As usual, if you use Bitcoin and want to show your support of my
 111 activities, please send Bitcoin donations to my address
 112 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 113 </div>
 114       <div class="tags">
 115
 116
 117         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>, <a href="http://people.skolelinux.org/pere/blog/tags/web">web</a>.
 118
 119
 120       </div>
 121     </div>
 122     <div class="padding"></div>
 123
 124     <div class="entry">
 125       <div class="title"><a href="http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html">New and improved Frikanalen Kodi addon version 0.0.3</a></div>
 126       <div class="date"> 8th November 2018</div>
 127       <div class="body"><p>If you read my blog regularly, you probably know I am involved in
 128 running and developing the <a href="https://frikanalen.no/">Norwegian
 129 TV channel Frikanalen</a>.  It is an open channel, allowing everyone
 130 in Norway to publish videos on a TV channel with national coverage.
 131 You can think of it as Youtube for national television.
 132 In addition to distribution on RiksTV and Uninett, Frikanalen is also
 133 available as a Kodi addon.  The last few days I have updated the code
 134 to add more features.  A
 135 <a href="https://kodi.tv/addon/plugins-video-add-ons/frikanalen-nett-tv">new
 136 and improved version 0.0.3 Frikanalen addon</a> was just made
 137 available via the Kodi repositories.  This new version include a
 138 option to browse videos by category, as well as free text search
 139 in the video archive.  It will now also show the video duration in the
 140 video lists, which were missing earlier.  A new and experimental
 141 link to the HD video stream currently being worked on is provided, for
 142 those that want to see what the <a href="https://casparcg.com/">CasparCG</a>
 143 output look like.  The alternative is the SD video stream, generated
 144 using MLT.  CasparCG is controlled by our
 145 <a href="https://github.com/Frikanalen/mltplayout/">mltplayout
 146 server</a> which instead of talking to mlt is giving PLAY instructions
 147 to the CasparCG server when it is time to start a new program.</p>
 148
 149 <p>By now, you are probably wondering what kind of content is being
 150 played on the channel.  These days, it is filled with technical
 151 presentations like those from <a href="https://www.nuug.no/">NUUG</a>,
 152 <a href="https://www.debconf.org/">Debconf</a>, Makercon, and TED,
 153 but there are also some periods with
 154 <a href="https://www.empo.no/">EMPT TV</a> and
 155 <a href="https://www.p7.no/">P7</a>.
 156
 157 <p>As usual, if you use Bitcoin and want to show your support of my
 158 activities, please send Bitcoin donations to my address
 159 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 160 </div>
 161       <div class="tags">
 162
 163
 164         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen</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>.
 165
 166
 167       </div>
 168     </div>
 169     <div class="padding"></div>
 170
 171     <div class="entry">
 172       <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>
 173       <div class="date"> 1st November 2018</div>
 174       <div class="body"><p>As part of my involvement in
 175 <a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core">the Nikita
 176 archive API project</a>, I've been importing a fairly large lump of
 177 emails into a test instance of the archive to see how well this would
 178 go.  I picked a subset of <a href="https://notmuchmail.org/">my
 179 notmuch email database</a>, all public emails sent to me via
 180 @lists.debian.org, giving me a set of around 216 000 emails to import.
 181 In the process, I had a look at the various attachments included in
 182 these emails, to figure out what to do with attachments, and noticed
 183 that one of the most common attachment formats do not have
 184 <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">an
 185 official MIME type</a> registered with IANA/IETF.  The output from
 186 diff, ie the input for patch, is on the top 10 list of formats
 187 included in these emails.  At the moment people seem to use either
 188 text/x-patch or text/x-diff, but neither is officially registered.  It
 189 would be better if one official MIME type were registered and used
 190 everywhere.</p>
 191
 192 <p>To try to get one official MIME type for these files, I've brought
 193 up the topic on
 194 <a href="https://www.ietf.org/mailman/listinfo/media-types">the
 195 media-types mailing list</a>.  If you are interested in discussion
 196 which MIME type to use as the official for patch files, or involved in
 197 making software using a MIME type for patches, perhaps you would like
 198 to join the discussion?</p>
 199
 200 <p>As usual, if you use Bitcoin and want to show your support of my
 201 activities, please send Bitcoin donations to my address
 202 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 203 </div>
 204       <div class="tags">
 205
 206
 207         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>.
 208
 209
 210       </div>
 211     </div>
 212     <div class="padding"></div>
 213
 214     <div class="entry">
 215       <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>
 216       <div class="date">22nd October 2018</div>
 217       <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>
 218
 219 <p>My current home stereo is a patchwork of various pieces I got on
 220 flee markeds over the years.  It is amazing what kind of equipment
 221 show up there.  I've been wondering for a while if it was possible to
 222 measure how well this equipment is working together, and decided to
 223 see how far I could get using free software.  After trawling the web I
 224 came across an article from DIY Audio and Video on
 225 <a href="https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/">Speaker
 226 Testing and Analysis</a> describing how to test speakers, and it listing
 227 several software options, among them
 228 <a href="https://sourceforge.net/projects/audmes/">AUDio MEasurement
 229 System (AUDMES)</a>.  It is the only free software system I could find
 230 focusing on measuring speakers and audio frequency response.  In the
 231 process I also found an interesting article from NOVO on
 232 <a href="http://novo.press/understanding-speaker-specifications-and-frequency-response/">Understanding
 233 Speaker Specifications and Frequency Response</a> and an article from
 234 ecoustics on
 235 <a href="https://www.ecoustics.com/articles/understanding-speaker-frequency-response/">Understanding
 236 Speaker Frequency Response</a>, with a lot of information on what to
 237 look for and how to interpret the graphs.  Armed with this knowledge,
 238 I set out to measure the state of my speakers.</p>
 239
 240 <p>The first hurdle was that AUDMES hadn't seen a commit for 10 years
 241 and did not build with current compilers and libraries.  I got in
 242 touch with its author, who no longer was spending time on the program
 243 but gave me write access to the subversion repository on Sourceforge.
 244 The end result is that now the code build on Linux and is capable of
 245 saving and loading the collected frequency response data in CSV
 246 format.  The application is quite nice and flexible, and I was able to
 247 select the input and output audio interfaces independently.  This made
 248 it possible to use a USB mixer as the input source, while sending
 249 output via my laptop headphone connection.  I lacked the hardware and
 250 cabling to figure out a different way to get independent cabling to
 251 speakers and microphone.</p>
 252
 253 <p>Using this setup I could see how a large range of high frequencies
 254 apparently were not making it out of my speakers.  The picture show
 255 the frequency response measurement of one of the speakers.  Note the
 256 frequency lines seem to be slightly misaligned, compared to the CSV
 257 output from the program.  I can not hear several of these are high
 258 frequencies, according to measurement from
 259 <a href="http://freehearingtestsoftware.com">Free Hearing Test
 260 Software</a>, an freeware system to measure your hearing (still
 261 looking for a free software alternative), so I do not know if they are
 262 coming out out the speakers.  I thus do not quite know how to figure
 263 out if the missing frequencies is a problem with the microphone, the
 264 amplifier or the speakers, but I managed to rule out the audio card in my
 265 PC by measuring my Bose noise canceling headset using its own
 266 microphone.  This setup was able to see the high frequency tones, so
 267 the problem with my stereo had to be in the amplifier or speakers.</p>
 268
 269 <p>Anyway, to try to role out one factor I ended up picking up a new
 270 set of speakers at a flee marked, and these work a lot better than the
 271 old speakers, so I guess the microphone and amplifier is OK.  If you
 272 need to measure your own speakers, check out AUDMES.  If more people
 273 get involved, perhaps the project could become good enough to
 274 <a href="https://bugs.debian.org/910876">include in Debian</a>?  And if
 275 you know of some other free software to measure speakers and amplifier
 276 performance, please let me know.  I am aware of the freeware option
 277 <a href="https://www.roomeqwizard.com/">REW</a>, but I want something
 278 that can be developed also when the vendor looses interest.</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/nice free software">nice free software</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/Web_browser_integration_of_VLC_with_Bittorrent_support.html">Web browser integration of VLC with Bittorrent support</a></div>
 296       <div class="date">21st October 2018</div>
 297       <div class="body"><p>Bittorrent is as far as I know, currently the most efficient way to
 298 distribute content on the Internet.  It is used all by all sorts of
 299 content providers, from national TV stations like
 300 <a href="https://www.nrk.no/">NRK</a>, Linux distributors like
 301 <a href="https://www.debian.org/">Debian</a> and
 302 <a href="https://www.ubuntu.com/">Ubuntu</a>, and of course the
 303 <a href="https://archive.org/">Internet archive</A>.
 304
 305 <p>Almost a month ago
 306 <a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">a new
 307 package adding Bittorrent support to VLC</a> became available in
 308 Debian testing and unstable.  To test it, simply install it like
 309 this:</p>
 310
 311 <p><pre>
 312 apt install vlc-plugin-bittorrent
 313 </pre></p>
 314
 315 <p>Since the plugin was made available for the first time in Debian,
 316 several improvements have been made to it.  In version 2.2-4, now
 317 available in both testing and unstable, a desktop file is provided to
 318 teach browsers to start VLC when the user click on torrent files or
 319 magnet links.  The last part is thanks to me finally understanding
 320 what the strange x-scheme-handler style MIME types in desktop files
 321 are used for.  By adding x-scheme-handler/magnet to the MimeType entry
 322 in the desktop file, at least the browsers Firefox and Chromium will
 323 suggest to start VLC when selecting a magnet URI on a web page.  The
 324 end result is that now, with the plugin installed in Buster and Sid,
 325 one can visit any
 326 <a href="https://archive.org/details/CopyingIsNotTheft1080p">Internet
 327 Archive page with movies</a> using a web browser and click on the
 328 torrent link to start streaming the movie.</p>
 329
 330 <p>Note, there is still some misfeatures in the plugin.  One is the
 331 fact that it will hang and
 332 <a href="https://github.com/johang/vlc-bittorrent/issues/13">block VLC
 333 from exiting until the torrent streaming starts</a>.  Another is the
 334 fact that it
 335 <a href="https://github.com/johang/vlc-bittorrent/issues/9">will pick
 336 and play a random file in a multi file torrent</a>.  This is not
 337 always the video file you want.  Combined with the first it can be a
 338 bit hard to get the video streaming going.  But when it work, it seem
 339 to do a good job.</p>
 340
 341 <p>For the Debian packaging, I would love to find a good way to test
 342 if the plugin work with VLC using autopkgtest.  I tried, but do not
 343 know enough of the inner workings of VLC to get it working.  For now
 344 the autopkgtest script is only checking if the .so file was
 345 successfully loaded by VLC.  If you have any suggestions, please
 346 submit a patch to the Debian bug tracking system.</p>
 347
 348 <p>As usual, if you use Bitcoin and want to show your support of my
 349 activities, please send Bitcoin donations to my address
 350 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 351 </div>
 352       <div class="tags">
 353
 354
 355         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>.
 356
 357
 358       </div>
 359     </div>
 360     <div class="padding"></div>
 361
 362     <div class="entry">
 363       <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>
 364       <div class="date">18th October 2018</div>
 365       <div class="body"><p>This morning, the new release of the
 366 <a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core/">Nikita
 367 Noark 5 core project</a> was
 368 <a href="https://lists.nuug.no/pipermail/nikita-noark/2018-October/000406.html">announced
 369 on the project mailing list</a>.  The free software solution is an
 370 implementation of the Norwegian archive standard Noark 5 used by
 371 government offices in Norway.  These were the changes in version 0.2
 372 since version 0.1.1 (from NEWS.md):
 373
 374 <ul>
 375   <li>Fix typos in REL names</li>
 376   <li>Tidy up error message reporting</li>
 377   <li>Fix issue where we used Integer.valueOf(), not Integer.getInteger()</li>
 378   <li>Change some String handling to StringBuffer</li>
 379   <li>Fix error reporting</li>
 380   <li>Code tidy-up</li>
 381   <li>Fix issue using static non-synchronized SimpleDateFormat to avoid
 382       race conditions</li>
 383   <li>Fix problem where deserialisers were treating integers as strings</li>
 384   <li>Update methods to make them null-safe</li>
 385   <li>Fix many issues reported by coverity</li>
 386   <li>Improve equals(), compareTo() and hash() in domain model</li>
 387   <li>Improvements to the domain model for metadata classes</li>
 388   <li>Fix CORS issues when downloading document</li>
 389   <li>Implementation of case-handling with registryEntry and document upload</li>
 390   <li>Better support in Javascript for OPTIONS</li>
 391   <li>Adding concept description of mail integration</li>
 392   <li>Improve setting of default values for GET on ny-journalpost</li>
 393   <li>Better handling of required values during deserialisation </li>
 394   <li>Changed tilknyttetDato (M620) from date to dateTime</li>
 395   <li>Corrected some opprettetDato (M600) (de)serialisation errors.</li>
 396   <li>Improve parse error reporting.</li>
 397   <li>Started on OData search and filtering.</li>
 398   <li>Added Contributor Covenant Code of Conduct to project.</li>
 399   <li>Moved repository and project from Github to Gitlab.</li>
 400   <li>Restructured repository, moved code into src/ and web/.</li>
 401   <li>Updated code to use Spring Boot version 2.</li>
 402   <li>Added support for OAuth2 authentication.</li>
 403   <li>Fixed several bugs discovered by Coverity.</li>
 404   <li>Corrected handling of date/datetime fields.</li>
 405   <li>Improved error reporting when rejecting during deserializatoin.</li>
 406   <li>Adjusted default values provided for ny-arkivdel, ny-mappe,
 407    ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.</li>
 408   <li>Several fixes for korrespondansepart*.</li>
 409   <li>Updated web GUI:
 410      <ul>
 411        <li>Now handle both file upload and download.</li>
 412        <li>Uses new OAuth2 authentication for login.</li>
 413        <li>Forms now fetches default values from API using GET.</li>
 414        <li>Added RFC 822 (email), TIFF and JPEG to list of possible file formats.</li>
 415      </ul></li>
 416 </ul>
 417
 418 <p>The changes and improvements are extensive.  Running diffstat on
 419 the changes between git tab 0.1.1 and 0.2 show 1098 files changed,
 420 108666 insertions(+), 54066 deletions(-).</p>
 421
 422 <p>If free and open standardized archiving API sound interesting to
 423 you, please contact us on IRC
 424 (<a href="irc://irc.freenode.net/%23nikita">#nikita on
 425 irc.freenode.net</a>) or email
 426 (<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">nikita-noark
 427 mailing list</a>).</p>
 428
 429 <p>As usual, if you use Bitcoin and want to show your support of my
 430 activities, please send Bitcoin donations to my address
 431 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 432 </div>
 433       <div class="tags">
 434
 435
 436         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>.
 437
 438
 439       </div>
 440     </div>
 441     <div class="padding"></div>
 442
 443     <div class="entry">
 444       <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>
 445       <div class="date"> 8th October 2018</div>
 446       <div class="body"><p>I have  earlier covered the basics of trusted timestamping using the
 447 'openssl ts' client.  See blog post for
 448 <a href="http://people.skolelinux.org/pere/blog/Public_Trusted_Timestamping_services_for_everyone.html">2014</a>,
 449 <a href="http://people.skolelinux.org/pere/blog/syslog_trusted_timestamp___chain_of_trusted_timestamps_for_your_syslog.html">2016</a>
 450 and
 451 <a href="http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html">2017</a>
 452 for those stories.  But some times I want to integrate the timestamping
 453 in other code, and recently I needed to integrate it into Python.
 454 After searching a bit, I found
 455 <a href="https://dev.entrouvert.org/projects/python-rfc3161">the
 456 rfc3161 library</a> which seemed like a good fit, but I soon
 457 discovered it only worked for python version 2, and I needed something
 458 that work with python version 3.  Luckily I next came across
 459 <a href="https://github.com/trbs/rfc3161ng/">the rfc3161ng library</a>,
 460 a fork of the original rfc3161 library.  Not only is it working with
 461 python 3, it have fixed a few of the bugs in the original library, and
 462 it has an active maintainer.  I decided to wrap it up and make it
 463 <a href="https://tracker.debian.org/pkg/python-rfc3161ng">available in
 464 Debian</a>, and a few days ago it entered Debian unstable and testing.</p>
 465
 466 <p>Using the library is fairly straight forward.  The only slightly
 467 problematic step is to fetch the required certificates to verify the
 468 timestamp.  For some services it is straight forward, while for others
 469 I have not yet figured out how to do it.  Here is a small standalone
 470 code example based on of the integration tests in the library code:</p>
 471
 472 <pre>
 473 #!/usr/bin/python3
 474
 475 """
 476
 477 Python 3 script demonstrating how to use the rfc3161ng module to
 478 get trusted timestamps.
 479
 480 The license of this code is the same as the license of the rfc3161ng
 481 library, ie MIT/BSD.
 482
 483 """
 484
 485 import os
 486 import pyasn1.codec.der
 487 import rfc3161ng
 488 import subprocess
 489 import tempfile
 490 import urllib.request
 491
 492 def store(f, data):
 493     f.write(data)
 494     f.flush()
 495     f.seek(0)
 496
 497 def fetch(url, f=None):
 498     response = urllib.request.urlopen(url)
 499     data = response.read()
 500     if f:
 501         store(f, data)
 502     return data
 503
 504 def main():
 505     with tempfile.NamedTemporaryFile() as cert_f,\
 506          tempfile.NamedTemporaryFile() as ca_f,\
 507          tempfile.NamedTemporaryFile() as msg_f,\
 508          tempfile.NamedTemporaryFile() as tsr_f:
 509
 510         # First fetch certificates used by service
 511         certificate_data = fetch('https://freetsa.org/files/tsa.crt', cert_f)
 512         ca_data_data = fetch('https://freetsa.org/files/cacert.pem', ca_f)
 513
 514         # Then timestamp the message
 515         timestamper = \
 516             rfc3161ng.RemoteTimestamper('http://freetsa.org/tsr',
 517                                         certificate=certificate_data)
 518         data = b"Python forever!\n"
 519         tsr = timestamper(data=data, return_tsr=True)
 520
 521         # Finally, convert message and response to something 'openssl ts' can verify
 522         store(msg_f, data)
 523         store(tsr_f, pyasn1.codec.der.encoder.encode(tsr))
 524         args = ["openssl", "ts", "-verify",
 525                 "-data", msg_f.name,
 526                 "-in", tsr_f.name,
 527                 "-CAfile", ca_f.name,
 528                 "-untrusted", cert_f.name]
 529         subprocess.check_call(args)
 530
 531 if '__main__' == __name__:
 532    main()
 533 </pre>
 534
 535 <p>The code fetches the required certificates, store them as temporary
 536 files, timestamp a simple message, store the message and timestamp to
 537 disk and ask 'openssl ts' to verify the timestamp.  A timestamp is
 538 around 1.5 kiB in size, and should be fairly easy to store for future
 539 use.</p>
 540
 541 <p>As usual, if you use Bitcoin and want to show your support of my
 542 activities, please send Bitcoin donations to my address
 543 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 544 </div>
 545       <div class="tags">
 546
 547
 548         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>.
 549
 550
 551       </div>
 552     </div>
 553     <div class="padding"></div>
 554
 555     <div class="entry">
 556       <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>
 557       <div class="date"> 4th October 2018</div>
 558       <div class="body"><p>A few days, I rescued a Windows victim over to Debian.  To try to
 559 rescue the remains, I helped set up automatic sync with Google Drive.
 560 I did not find any sensible Debian package handling this
 561 automatically, so I rebuild the grive2 source from
 562 <a href="http://www.webupd8.org/">the Ubuntu UPD8 PPA</a> to do the
 563 task and added a autostart desktop entry and a small shell script to
 564 run in the background while the user is logged in to do the sync.
 565 Here is a sketch of the setup for future reference.</p>
 566
 567 <p>I first created <tt>~/googledrive</tt>, entered the directory and
 568 ran '<tt>grive -a</tt>' to authenticate the machine/user.  Next, I
 569 created a autostart hook in <tt>~/.config/autostart/grive.desktop</tt>
 570 to start the sync when the user log in:</p>
 571
 572 <p><blockquote><pre>
 573 [Desktop Entry]
 574 Name=Google drive autosync
 575 Type=Application
 576 Exec=/home/user/bin/grive-sync
 577 </pre></blockquote></p>
 578
 579 <p>Finally, I wrote the <tt>~/bin/grive-sync</tt> script to sync
 580 ~/googledrive/ with the files in Google Drive.</p>
 581
 582 <p><blockquote><pre>
 583 #!/bin/sh
 584 set -e
 585 cd ~/
 586 cleanup() {
 587     if [ "$syncpid" ] ; then
 588         kill $syncpid
 589     fi
 590 }
 591 trap cleanup EXIT INT QUIT
 592 /usr/lib/grive/grive-sync.sh listen googledrive 2>&1 | sed "s%^%$0:%" &
 593 syncpdi=$!
 594 while true; do
 595     if ! xhost >/dev/null 2>&1 ; then
 596         echo "no DISPLAY, exiting as the user probably logged out"
 597         exit 1
 598     fi
 599     if [ ! -e /run/user/1000/grive-sync.sh_googledrive ] ; then
 600         /usr/lib/grive/grive-sync.sh sync googledrive
 601     fi
 602     sleep 300
 603 done 2>&1 | sed "s%^%$0:%"
 604 </pre></blockquote></p>
 605
 606 <p>Feel free to use the setup if you want.  It can be assumed to be
 607 GNU GPL v2 licensed (or any later version, at your leisure), but I
 608 doubt this code is possible to claim copyright on.</p>
 609
 610 <p>As usual, if you use Bitcoin and want to show your support of my
 611 activities, please send Bitcoin donations to my address
 612 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 613 </div>
 614       <div class="tags">
 615
 616
 617         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>.
 618
 619
 620       </div>
 621     </div>
 622     <div class="padding"></div>
 623
 624     <div class="entry">
 625       <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>
 626       <div class="date">29th September 2018</div>
 627       <div class="body"><p>It would come as no surprise to anyone that I am interested in
 628 bitcoins and virtual currencies.  I've been keeping an eye on virtual
 629 currencies for many years, and it is part of the reason a few months
 630 ago, I started writing a python library for collecting currency
 631 exchange rates and trade on virtual currency exchanges.  I decided to
 632 name the end result valutakrambod, which perhaps can be translated to
 633 small currency shop.</p>
 634
 635 <p>The library uses the tornado python library to handle HTTP and
 636 websocket connections, and provide a asynchronous system for
 637 connecting to and tracking several services.  The code is available
 638 from
 639 <a href="http://github.com/petterreinholdtsen/valutakrambod">github</a>.</p>
 640
 641 </p>There are two example clients of the library.  One is very simple and
 642 list every updated buy/sell price received from the various services.
 643 This code is started by running bin/btc-rates and call the client code
 644 in valutakrambod/client.py.  The simple client look like this:</p>
 645
 646 <p><blockquote><pre>
 647 import functools
 648 import tornado.ioloop
 649 import valutakrambod
 650 class SimpleClient(object):
 651     def __init__(self):
 652         self.services = []
 653         self.streams = []
 654         pass
 655     def newdata(self, service, pair, changed):
 656         print("%-15s %s-%s: %8.3f %8.3f" % (
 657             service.servicename(),
 658             pair[0],
 659             pair[1],
 660             service.rates[pair]['ask'],
 661             service.rates[pair]['bid'])
 662         )
 663     async def refresh(self, service):
 664         await service.fetchRates(service.wantedpairs)
 665     def run(self):
 666         self.ioloop = tornado.ioloop.IOLoop.current()
 667         self.services = valutakrambod.service.knownServices()
 668         for e in self.services:
 669             service = e()
 670             service.subscribe(self.newdata)
 671             stream = service.websocket()
 672             if stream:
 673                 self.streams.append(stream)
 674             else:
 675                 # Fetch information from non-streaming services immediately
 676                 self.ioloop.call_later(len(self.services),
 677                                        functools.partial(self.refresh, service))
 678                 # as well as regularly
 679                 service.periodicUpdate(60)
 680         for stream in self.streams:
 681             stream.connect()
 682         try:
 683             self.ioloop.start()
 684         except KeyboardInterrupt:
 685             print("Interrupted by keyboard, closing all connections.")
 686             pass
 687         for stream in self.streams:
 688             stream.close()
 689 </pre></blockquote></p>
 690
 691 <p>The library client loops over all known "public" services,
 692 initialises it, subscribes to any updates from the service, checks and
 693 activates websocket streaming if the service provide it, and if no
 694 streaming is supported, fetches information from the service and sets
 695 up a periodic update every 60 seconds.  The output from this client
 696 can look like this:</p>
 697
 698 <p><blockquote><pre>
 699 Bl3p            BTC-EUR: 5687.110 5653.690
 700 Bl3p            BTC-EUR: 5687.110 5653.690
 701 Bl3p            BTC-EUR: 5687.110 5653.690
 702 Hitbtc          BTC-USD: 6594.560 6593.690
 703 Hitbtc          BTC-USD: 6594.560 6593.690
 704 Bl3p            BTC-EUR: 5687.110 5653.690
 705 Hitbtc          BTC-USD: 6594.570 6593.690
 706 Bitstamp        EUR-USD:    1.159    1.154
 707 Hitbtc          BTC-USD: 6594.570 6593.690
 708 Hitbtc          BTC-USD: 6594.580 6593.690
 709 Hitbtc          BTC-USD: 6594.580 6593.690
 710 Hitbtc          BTC-USD: 6594.580 6593.690
 711 Bl3p            BTC-EUR: 5687.110 5653.690
 712 Paymium         BTC-EUR: 5680.000 5620.240
 713 </pre></blockquote></p>
 714
 715 <p>The exchange order book is tracked in addition to the best buy/sell
 716 price, for those that need to know the details.</p>
 717
 718 <p>The other example client is focusing on providing a curses view
 719 with updated buy/sell prices as soon as they are received from the
 720 services.  This code is located in bin/btc-rates-curses and activated
 721 by using the '-c' argument.  Without the argument the "curses" output
 722 is printed without using curses, which is useful for debugging.  The
 723 curses view look like this:</p>
 724
 725 <p><blockquote><pre>
 726            Name Pair   Bid         Ask         Spr    Ftcd    Age
 727  BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
 728        Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
 729         Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
 730          Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
 731        Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
 732            Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
 733        Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
 734          Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
 735         Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
 736  BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
 737         Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
 738          Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
 739        Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
 740         MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
 741  BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
 742        Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
 743          Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
 744        Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
 745        Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
 746          Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
 747          Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
 748          Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
 749   Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 750      Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 751        Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
 752   Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
 753  BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
 754  BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
 755  BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
 756      Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
 757 </pre></blockquote></p>
 758
 759 <p>The code for this client is too complex for a simple blog post, so
 760 you will have to check out the git repository to figure out how it
 761 work.  What I can tell is how the three last numbers on each line
 762 should be interpreted.  The first is how many seconds ago information
 763 was received from the service.  The second is how long ago, according
 764 to the service, the provided information was updated.  The last is an
 765 estimate on how often the buy/sell values change.</p>
 766
 767 <p>If you find this library useful, or would like to improve it, I
 768 would love to hear from you.  Note that for some of the services I've
 769 implemented a trading API.  It might be the topic of a future blog
 770 post.</p>
 771
 772 <p>As usual, if you use Bitcoin and want to show your support of my
 773 activities, please send Bitcoin donations to my address
 774 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 775 </div>
 776       <div class="tags">
 777
 778
 779         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>.
 780
 781
 782       </div>
 783     </div>
 784     <div class="padding"></div>
 785
 786     <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>
 787     <div id="sidebar">
 788
 789
 790
 791 <h2>Archive</h2>
 792 <ul>
 793
 794 <li>2018
 795 <ul>
 796
 797 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 798
 799 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 800
 801 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 802
 803 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 804
 805 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 806
 807 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 808
 809 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 810
 811 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 812
 813 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 814
 815 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 816
 817 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/12/">December (2)</a></li>
 818
 819 </ul></li>
 820
 821 <li>2017
 822 <ul>
 823
 824 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 825
 826 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 827
 828 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 829
 830 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 831
 832 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 833
 834 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 835
 836 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 837
 838 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 839
 840 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 841
 842 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 843
 844 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 845
 846 </ul></li>
 847
 848 <li>2016
 849 <ul>
 850
 851 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 852
 853 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 854
 855 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 856
 857 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 858
 859 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 860
 861 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 862
 863 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 864
 865 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 866
 867 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 868
 869 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 870
 871 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 872
 873 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 874
 875 </ul></li>
 876
 877 <li>2015
 878 <ul>
 879
 880 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 881
 882 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 883
 884 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 885
 886 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 887
 888 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 889
 890 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 891
 892 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 893
 894 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 895
 896 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 897
 898 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 899
 900 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 901
 902 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 903
 904 </ul></li>
 905
 906 <li>2014
 907 <ul>
 908
 909 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 910
 911 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 912
 913 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 914
 915 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 916
 917 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 918
 919 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 920
 921 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 922
 923 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 924
 925 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 926
 927 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 928
 929 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 930
 931 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 932
 933 </ul></li>
 934
 935 <li>2013
 936 <ul>
 937
 938 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 939
 940 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 941
 942 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 943
 944 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 945
 946 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 947
 948 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 949
 950 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 951
 952 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 953
 954 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 957
 958 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 961
 962 </ul></li>
 963
 964 <li>2012
 965 <ul>
 966
 967 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 968
 969 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 970
 971 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 972
 973 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 974
 975 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 976
 977 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 978
 979 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 980
 981 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 982
 983 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 984
 985 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 986
 987 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 990
 991 </ul></li>
 992
 993 <li>2011
 994 <ul>
 995
 996 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 997
 998 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 999
1000 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1001
1002 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1003
1004 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1005
1006 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1007
1008 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1009
1010 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1011
1012 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1019
1020 </ul></li>
1021
1022 <li>2010
1023 <ul>
1024
1025 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1026
1027 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1028
1029 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1030
1031 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1032
1033 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1034
1035 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1036
1037 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1038
1039 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1040
1041 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1048
1049 </ul></li>
1050
1051 <li>2009
1052 <ul>
1053
1054 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1055
1056 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1057
1058 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1059
1060 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1061
1062 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1063
1064 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1065
1066 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1067
1068 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1069
1070 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1077
1078 </ul></li>
1079
1080 <li>2008
1081 <ul>
1082
1083 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1084
1085 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1086
1087 </ul></li>
1088
1089 </ul>
1090
1091
1092
1093 <h2>Tags</h2>
1094 <ul>
1095
1096  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
1097
1098  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1099
1100  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1101
1102  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1103
1104  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (10)</a></li>
1105
1106  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
1107
1108  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1109
1110  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1111
1112  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (164)</a></li>
1113
1114  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1115
1116  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1117
1118  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1119
1120  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1121
1122  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (25)</a></li>
1123
1124  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1125
1126  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (393)</a></li>
1127
1128  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1129
1130  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (13)</a></li>
1131
1132  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (32)</a></li>
1133
1134  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1135
1136  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (19)</a></li>
1137
1138  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1139
1140  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1141
1142  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
1143
1144  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1145
1146  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
1147
1148  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1149
1150  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1151
1152  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1153
1154  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1155
1156  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1157
1158  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1159
1160  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (41)</a></li>
1161
1162  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (11)</a></li>
1163
1164  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (300)</a></li>
1165
1166  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (191)</a></li>
1167
1168  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (34)</a></li>
1169
1170  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1171
1172  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (72)</a></li>
1173
1174  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (108)</a></li>
1175
1176  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1177
1178  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1179
1180  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1181
1182  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1183
1184  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1185
1186  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1187
1188  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (6)</a></li>
1189
1190  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1191
1192  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (55)</a></li>
1193
1194  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1195
1196  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1197
1198  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (58)</a></li>
1199
1200  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1201
1202  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1203
1204  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (55)</a></li>
1205
1206  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1207
1208  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1209
1210  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1211
1212  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (13)</a></li>
1213
1214  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (70)</a></li>
1215
1216  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1217
1218  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
1219
1220 </ul>
1221
1222
1223     </div>
1224     <p style="text-align: right">
1225  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1226 </p>
1227
1228   </body>
1229 </html>