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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/Metadata_proposal_for_movies_on_the_Internet_Archive.html">Metadata proposal for movies on the Internet Archive</a></div>
  24       <div class="date">28th November 2017</div>
  25       <div class="body"><p>It would be easier to locate the movie you want to watch in
  26 <a href="https://www.archive.org/">the Internet Archive</a>, if the
  27 metadata about each movie was more complete and accurate.  In the
  28 archiving community, a well known saying state that good metadata is a
  29 love letter to the future.  The metadata in the Internet Archive could
  30 use a face lift for the future to love us back.  Here is a proposal
  31 for a small improvement that would make the metadata more useful
  32 today.  I've been unable to find any document describing the various
  33 standard fields available when uploading videos to the archive, so
  34 this proposal is based on my best quess and searching through several
  35 of the existing movies.</p>
  36
  37 <p>I have a few use cases in mind.  First of all, I would like to be
  38 able to count the number of distinct movies in the Internet Archive,
  39 without duplicates.  I would further like to identify the IMDB title
  40 ID of the movies in the Internet Archive, to be able to look up a IMDB
  41 title ID and know if I can fetch the video from there and share it
  42 with my friends.</p>
  43
  44 <p>Second, I would like the Butter data provider for The Internet
  45 archive
  46 (<a href="https://github.com/butterproviders/butter-provider-archive">available
  47 from github</a>), to list as many of the good movies as possible.  The
  48 plugin currently do a search in the archive with the following
  49 parameters:</p>
  50
  51 <p><pre>
  52 collection:moviesandfilms
  53 AND NOT collection:movie_trailers
  54 AND -mediatype:collection
  55 AND format:"Archive BitTorrent"
  56 AND year
  57 </pre></p>
  58
  59 <p>Most of the cool movies that fail to show up in Butter do so
  60 because the 'year' field is missing.  The 'year' field is populated by
  61 the year part from the 'date' field, and should be when the movie was
  62 released (date or year).  Two such examples are
  63 <a href="https://archive.org/details/SidneyOlcottsBen-hur1905">Ben Hur
  64 from 1905</a> and
  65 <a href="https://archive.org/details/Caminandes2GranDillama">Caminandes
  66 2: Gran Dillama from 2013</a>, where the year metadata field is
  67 missing.</p>
  68
  69 So, my proposal is simply, for every movie in The Internet Archive
  70 where an IMDB title ID exist, please fill in these metadata fields
  71 (note, they can be updated also long after the video was uploaded, but
  72 as far as I can tell, only by the uploader):
  73
  74 <dl>
  75
  76 <dt>mediatype</dt>
  77 <dd>Should be 'movie' for movies.</dd>
  78
  79 <dt>collection</dt>
  80 <dd>Should contain 'moviesandfilms'.</dd>
  81
  82 <dt>title</dt>
  83 <dd>The title of the movie, without the publication year.</dd>
  84
  85 <dt>date</dt>
  86 <dd>The data or year the movie was released.  This make the movie show
  87 up in Butter, as well as make it possible to know the age of the
  88 movie and is useful to figure out copyright status.</dd>
  89
  90 <dt>director</dt>
  91 <dd>The director of the movie.  This make it easier to know if the
  92 correct movie is found in movie databases.</dd>
  93
  94 <dt>publisher</dt>
  95 <dd>The production company making the movie.  Also useful for
  96 identifying the correct movie.</dd>
  97
  98 <dt>links</dt>
  99
 100 <dd>Add a link to the IMDB title page, for example like this: &lt;a
 101 href="http://www.imdb.com/title/tt0028496/"&gt;Movie in
 102 IMDB&lt;/a&gt;.  This make it easier to find duplicates and allow for
 103 counting of number of unique movies in the Archive.  Other external
 104 references, like to TMDB, could be added like this too.</dd>
 105
 106 </dl>
 107
 108 <p>I did consider proposing a Custom field for the IMDB title ID (for
 109 example 'imdb_title_url', 'imdb_code' or simply 'imdb', but suspect it
 110 will be easier to simply place it in the links free text field.</p>
 111
 112 <p>I created
 113 <a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
 114 list of IMDB title IDs for several thousand movies in the Internet
 115 Archive</a>, but I also got a list of several thousand movies without
 116 such IMDB title ID (and quite a few duplicates).  It would be great if
 117 this data set could be integrated into the Internet Archive metadata
 118 to be available for everyone in the future, but with the current
 119 policy of leaving metadata editing to the uploaders, it will take a
 120 while before this happen.  If you have uploaded movies into the
 121 Internet Archive, you can help.  Please consider following my proposal
 122 above for your movies, to ensure that movie is properly
 123 counted. :)</p>
 124
 125 <p>The list is mostly generated using wikidata, which based on
 126 Wikipedia articles make it possible to link between IMDB and movies in
 127 the Internet Archive.  But there are lots of movies without a
 128 Wikipedia article, and some movies where only a collection page exist
 129 (like for <a href="https://en.wikipedia.org/wiki/Caminandes">the
 130 Caminandes example above</a>, where there are three movies but only
 131 one Wikidata entry).</p>
 132
 133 <p>As usual, if you use Bitcoin and want to show your support of my
 134 activities, please send Bitcoin donations to my address
 135 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 136 </div>
 137       <div class="tags">
 138
 139
 140         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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
 141
 142
 143       </div>
 144     </div>
 145     <div class="padding"></div>
 146
 147     <div class="entry">
 148       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Legal_to_share_more_than_3000_movies_listed_on_IMDB_.html">Legal to share more than 3000 movies listed on IMDB?</a></div>
 149       <div class="date">18th November 2017</div>
 150       <div class="body"><p>A month ago, I blogged about my work to
 151 <a href="http://people.skolelinux.org/pere/blog/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">automatically
 152 check the copyright status of IMDB entries</a>, and try to count the
 153 number of movies listed in IMDB that is legal to distribute on the
 154 Internet.  I have continued to look for good data sources, and
 155 identified a few more.  The code used to extract information from
 156 various data sources is available in
 157 <a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
 158 git repository</a>, currently available from github.</p>
 159
 160 <p>So far I have identified 3186 unique IMDB title IDs.  To gain
 161 better understanding of the structure of the data set, I created a
 162 histogram of the year associated with each movie (typically release
 163 year).  It is interesting to notice where the peaks and dips in the
 164 graph are located.  I wonder why they are placed there.  I suspect
 165 World War II caused the dip around 1940, but what caused the peak
 166 around 2010?</p>
 167
 168 <p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2017-11-18-verk-i-det-fri-filmer.png" /></p>
 169
 170 <p>I've so far identified ten sources for IMDB title IDs for movies in
 171 the public domain or with a free license.  This is the statistics
 172 reported when running 'make stats' in the git repository:</p>
 173
 174 <pre>
 175   249 entries (    6 unique) with and   288 without IMDB title ID in free-movies-archive-org-butter.json
 176  2301 entries (  540 unique) with and     0 without IMDB title ID in free-movies-archive-org-wikidata.json
 177   830 entries (   29 unique) with and     0 without IMDB title ID in free-movies-icheckmovies-archive-mochard.json
 178  2109 entries (  377 unique) with and     0 without IMDB title ID in free-movies-imdb-pd.json
 179   291 entries (  122 unique) with and     0 without IMDB title ID in free-movies-letterboxd-pd.json
 180   144 entries (  135 unique) with and     0 without IMDB title ID in free-movies-manual.json
 181   350 entries (    1 unique) with and   801 without IMDB title ID in free-movies-publicdomainmovies.json
 182     4 entries (    0 unique) with and   124 without IMDB title ID in free-movies-publicdomainreview.json
 183   698 entries (  119 unique) with and   118 without IMDB title ID in free-movies-publicdomaintorrents.json
 184     8 entries (    8 unique) with and   196 without IMDB title ID in free-movies-vodo.json
 185  3186 unique IMDB title IDs in total
 186 </pre>
 187
 188 <p>The entries without IMDB title ID are candidates to increase the
 189 data set, but might equally well be duplicates of entries already
 190 listed with IMDB title ID in one of the other sources, or represent
 191 movies that lack a IMDB title ID.  I've seen examples of all these
 192 situations when peeking at the entries without IMDB title ID.  Based
 193 on these data sources, the lower bound for movies listed in IMDB that
 194 are legal to distribute on the Internet is between 3186 and 4713.
 195
 196 <p>It would be great for improving the accuracy of this measurement,
 197 if the various sources added IMDB title ID to their metadata.  I have
 198 tried to reach the people behind the various sources to ask if they
 199 are interested in doing this, without any replies so far.  Perhaps you
 200 can help me get in touch with the people behind VODO, Public Domain
 201 Torrents, Public Domain Movies and Public Domain Review to try to
 202 convince them to add more metadata to their movie entries?</p>
 203
 204 <p>Another way you could help is by adding pages to Wikipedia about
 205 movies that are legal to distribute on the Internet.  If such page
 206 exist and include a link to both IMDB and The Internet Archive, the
 207 script used to generate free-movies-archive-org-wikidata.json should
 208 pick up the mapping as soon as wikidata is updates.</p>
 209
 210 <p>As usual, if you use Bitcoin and want to show your support of my
 211 activities, please send Bitcoin donations to my address
 212 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 213 </div>
 214       <div class="tags">
 215
 216
 217         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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
 218
 219
 220       </div>
 221     </div>
 222     <div class="padding"></div>
 223
 224     <div class="entry">
 225       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Some_notes_on_fault_tolerant_storage_systems.html">Some notes on fault tolerant storage systems</a></div>
 226       <div class="date"> 1st November 2017</div>
 227       <div class="body"><p>If you care about how fault tolerant your storage is, you might
 228 find these articles and papers interesting.  They have formed how I
 229 think of when designing a storage system.</p>
 230
 231 <ul>
 232
 233 <li>USENIX :login; <a
 234 href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
 235 Does Not Imply Fault Tolerance.  Analysis of Distributed Storage
 236 Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
 237 Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
 238 H. Arpaci-Dusseau</li>
 239
 240 <li>ZDNet
 241 <a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
 242 RAID 5 stops working in 2009</a> by Robin Harris</li>
 243
 244 <li>ZDNet
 245 <a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
 246 RAID 6 stops working in 2019</a> by Robin Harris</li>
 247
 248 <li>USENIX FAST'07
 249 <a href="http://research.google.com/archive/disk_failures.pdf">Failure
 250 Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
 251 Wolf-Dietrich Weber and Luiz André Barroso</li>
 252
 253 <li>USENIX ;login: <a
 254 href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
 255 Integrity.  Finding Truth in a World of Guesses and Lies</a> by Doug
 256 Hughes</li>
 257
 258 <li>USENIX FAST'08
 259 <a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
 260 Analysis of Data Corruption in the Storage Stack</a> by
 261 L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
 262 Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
 263
 264 <li>USENIX FAST'07 <a
 265 href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
 266 failures in the real world: what does an MTTF of 1,000,000 hours mean
 267 to you?</a> by B. Schroeder and G. A. Gibson.</li>
 268
 269 <li>USENIX ;login: <a
 270 href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
 271 Disks the Dominant Contributor for Storage Failures?  A Comprehensive
 272 Study of Storage Subsystem Failure Characteristics</a> by Weihang
 273 Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
 274
 275 <li>SIGMETRICS 2007
 276 <a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
 277 analysis of latent sector errors in disk drives</a> by
 278 L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
 279
 280 </ul>
 281
 282 <p>Several of these research papers are based on data collected from
 283 hundred thousands or millions of disk, and their findings are eye
 284 opening.  The short story is simply do not implicitly trust RAID or
 285 redundant storage systems.  Details matter.  And unfortunately there
 286 are few options on Linux addressing all the identified issues.  Both
 287 ZFS and Btrfs are doing a fairly good job, but have legal and
 288 practical issues on their own.  I wonder how cluster file systems like
 289 Ceph do in this regard.  After all, there is an old saying, you know
 290 you have a distributed system when the crash of a computer you have
 291 never heard of stops you from getting any work done.  The same holds
 292 true if fault tolerance do not work.</p>
 293
 294 <p>Just remember, in the end, it do not matter how redundant, or how
 295 fault tolerant your storage is, if you do not continuously monitor its
 296 status to detect and replace failed disks.</p>
 297
 298 <p>As usual, if you use Bitcoin and want to show your support of my
 299 activities, please send Bitcoin donations to my address
 300 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 301 </div>
 302       <div class="tags">
 303
 304
 305         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/raid">raid</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin</a>.
 306
 307
 308       </div>
 309     </div>
 310     <div class="padding"></div>
 311
 312     <div class="entry">
 313       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Web_services_for_writing_academic_LaTeX_papers_as_a_team.html">Web services for writing academic LaTeX papers as a team</a></div>
 314       <div class="date">31st October 2017</div>
 315       <div class="body"><p>I was surprised today to learn that a friend in academia did not
 316 know there are easily available web services available for writing
 317 LaTeX documents as a team.  I thought it was common knowledge, but to
 318 make sure at least my readers are aware of it, I would like to mention
 319 these useful services for writing LaTeX documents.  Some of them even
 320 provide a WYSIWYG editor to ease writing even further.</p>
 321
 322 <p>There are two commercial services available,
 323 <a href="https://sharelatex.com">ShareLaTeX</a> and
 324 <a href="https://overleaf.com">Overleaf</a>.  They are very easy to
 325 use.  Just start a new document, select which publisher to write for
 326 (ie which LaTeX style to use), and start writing.  Note, these two
 327 have announced their intention to join forces, so soon it will only be
 328 one joint service.  I've used both for different documents, and they
 329 work just fine.  While
 330 <a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
 331 software</a>, while the latter is not.  According to <a
 332 href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
 333 announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
 334 base maintained as free software.</p>
 335
 336 But these two are not the only alternatives.
 337 <a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
 338 software solution with <a href="https://github.com/fiduswriter">the
 339 source available on github</a>.  I have not used it myself.  Several
 340 others can be found on the nice
 341 <a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
 342 web service</a>.
 343
 344 <p>If you like Google Docs or Etherpad, but would like to write
 345 documents in LaTeX, you should check out these services.  You can even
 346 host your own, if you want to. :)</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>.
 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/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">Locating IMDB IDs of movies in the Internet Archive using Wikidata</a></div>
 364       <div class="date">25th October 2017</div>
 365       <div class="body"><p>Recently, I needed to automatically check the copyright status of a
 366 set of <a href="http://www.imdb.com/">The Internet Movie database
 367 (IMDB)</a> entries, to figure out which one of the movies they refer
 368 to can be freely distributed on the Internet.  This proved to be
 369 harder than it sounds.  IMDB for sure list movies without any
 370 copyright protection, where the copyright protection has expired or
 371 where the movie is lisenced using a permissive license like one from
 372 Creative Commons.  These are mixed with copyright protected movies,
 373 and there seem to be no way to separate these classes of movies using
 374 the information in IMDB.</p>
 375
 376 <p>First I tried to look up entries manually in IMDB,
 377 <a href="https://www.wikipedia.org/">Wikipedia</a> and
 378 <a href="https://www.archive.org/">The Internet Archive</a>, to get a
 379 feel how to do this.  It is hard to know for sure using these sources,
 380 but it should be possible to be reasonable confident a movie is "out
 381 of copyright" with a few hours work per movie.  As I needed to check
 382 almost 20,000 entries, this approach was not sustainable.  I simply
 383 can not work around the clock for about 6 years to check this data
 384 set.</p>
 385
 386 <p>I asked the people behind The Internet Archive if they could
 387 introduce a new metadata field in their metadata XML for IMDB ID, but
 388 was told that they leave it completely to the uploaders to update the
 389 metadata.  Some of the metadata entries had IMDB links in the
 390 description, but I found no way to download all metadata files in bulk
 391 to locate those ones and put that approach aside.</p>
 392
 393 <p>In the process I noticed several Wikipedia articles about movies
 394 had links to both IMDB and The Internet Archive, and it occured to me
 395 that I could use the Wikipedia RDF data set to locate entries with
 396 both, to at least get a lower bound on the number of movies on The
 397 Internet Archive with a IMDB ID.  This is useful based on the
 398 assumption that movies distributed by The Internet Archive can be
 399 legally distributed on the Internet.  With some help from the RDF
 400 community (thank you DanC), I was able to come up with this query to
 401 pass to <a href="https://query.wikidata.org/">the SPARQL interface on
 402 Wikidata</a>:
 403
 404 <p><pre>
 405 SELECT ?work ?imdb ?ia ?when ?label
 406 WHERE
 407 {
 408   ?work wdt:P31/wdt:P279* wd:Q11424.
 409   ?work wdt:P345 ?imdb.
 410   ?work wdt:P724 ?ia.
 411   OPTIONAL {
 412         ?work wdt:P577 ?when.
 413         ?work rdfs:label ?label.
 414         FILTER(LANG(?label) = "en").
 415   }
 416 }
 417 </pre></p>
 418
 419 <p>If I understand the query right, for every film entry anywhere in
 420 Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
 421 when the movie was released and its English title, if either or both
 422 of the latter two are available.  At the moment the result set contain
 423 2338 entries.  Of course, it depend on volunteers including both
 424 correct IMDB and The Internet Archive IDs in the wikipedia articles
 425 for the movie.  It should be noted that the result will include
 426 duplicates if the movie have entries in several languages.  There are
 427 some bogus entries, either because The Internet Archive ID contain a
 428 typo or because the movie is not available from The Internet Archive.
 429 I did not verify the IMDB IDs, as I am unsure how to do that
 430 automatically.</p>
 431
 432 <p>I wrote a small python script to extract the data set from Wikidata
 433 and check if the XML metadata for the movie is available from The
 434 Internet Archive, and after around 1.5 hour it produced a list of 2097
 435 free movies and their IMDB ID.  In total, 171 entries in Wikidata lack
 436 the refered Internet Archive entry.  I assume the 70 "disappearing"
 437 entries (ie 2338-2097-171) are duplicate entries.</p>
 438
 439 <p>This is not too bad, given that The Internet Archive report to
 440 contain <a href="https://archive.org/details/feature_films">5331
 441 feature films</a> at the moment, but it also mean more than 3000
 442 movies are missing on Wikipedia or are missing the pair of references
 443 on Wikipedia.</p>
 444
 445 <p>I was curious about the distribution by release year, and made a
 446 little graph to show how the amount of free movies is spread over the
 447 years:<p>
 448
 449 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
 450
 451 <p>I expect the relative distribution of the remaining 3000 movies to
 452 be similar.</p>
 453
 454 <p>If you want to help, and want to ensure Wikipedia can be used to
 455 cross reference The Internet Archive and The Internet Movie Database,
 456 please make sure entries like this are listed under the "External
 457 links" heading on the Wikipedia article for the movie:</p>
 458
 459 <p><pre>
 460 * {{Internet Archive film|id=FightingLady}}
 461 * {{IMDb title|id=0036823|title=The Fighting Lady}}
 462 </pre></p>
 463
 464 <p>Please verify the links on the final page, to make sure you did not
 465 introduce a typo.</p>
 466
 467 <p>Here is the complete list, if you want to correct the 171
 468 identified Wikipedia entries with broken links to The Internet
 469 Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
 470 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 471 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 472 <a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
 473 <a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
 474 <a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
 475 <a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
 476 <a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
 477 <a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
 478 <a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
 479 <a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
 480 <a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
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 640
 641 <p>As usual, if you use Bitcoin and want to show your support of my
 642 activities, please send Bitcoin donations to my address
 643 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 644 </div>
 645       <div class="tags">
 646
 647
 648         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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
 649
 650
 651       </div>
 652     </div>
 653     <div class="padding"></div>
 654
 655     <div class="entry">
 656       <div class="title"><a href="http://people.skolelinux.org/pere/blog/A_one_way_wall_on_the_border_.html">A one-way wall on the border?</a></div>
 657       <div class="date">14th October 2017</div>
 658       <div class="body"><p>I find it fascinating how many of the people being locked inside
 659 the proposed border wall between USA and Mexico support the idea.  The
 660 proposal to keep Mexicans out reminds me of
 661 <a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
 662 propaganda twist from the East Germany government</a> calling the wall
 663 the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
 664 that the wall was erected to keep enemies from creeping into East
 665 Germany, while it was obvious to the people locked inside it that it
 666 was erected to keep the people from escaping.</p>
 667
 668 <p>Do the people in USA supporting this wall really believe it is a
 669 one way wall, only keeping people on the outside from getting in,
 670 while not keeping people in the inside from getting out?</p>
 671
 672 <p>As usual, if you use Bitcoin and want to show your support of my
 673 activities, please send Bitcoin donations to my address
 674 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 675 </div>
 676       <div class="tags">
 677
 678
 679         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 680
 681
 682       </div>
 683     </div>
 684     <div class="padding"></div>
 685
 686     <div class="entry">
 687       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Generating_3D_prints_in_Debian_using_Cura_and_Slic3r__prusa_.html">Generating 3D prints in Debian using Cura and Slic3r(-prusa)</a></div>
 688       <div class="date"> 9th October 2017</div>
 689       <div class="body"><p>At my nearby maker space,
 690 <a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
 691 was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
 692 on Windows and MacOS X than Linux, because the software involved had
 693 to be manually compiled and set up on Linux while premade packages
 694 worked out of the box on Windows and MacOS X.  I found this annoying,
 695 as the software involved,
 696 <a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
 697 and should be trivial to get up and running on Linux if someone took
 698 the time to package it for the relevant distributions.  I even found
 699 <a href="https://bugs.debian.org/706656">a request for adding into
 700 Debian</a> from 2013, which had seem some activity over the years but
 701 never resulted in the software showing up in Debian.  So a few days
 702 ago I offered my help to try to improve the situation.</p>
 703
 704 <p>Now I am very happy to see that all the packages required by a
 705 working Cura in Debian are uploaded into Debian and waiting in the NEW
 706 queue for the ftpmasters to have a look.  You can track the progress
 707 on
 708 <a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
 709 status page for the 3D printer team</a>.</p>
 710
 711 <p>The uploaded packages are a bit behind upstream, and was uploaded
 712 now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
 713 queue</a> while we work up updating the packages to the latest
 714 upstream version.</p>
 715
 716 <p>On a related note, two competitors for Cura, which I found harder
 717 to use and was unable to configure correctly for Ultimaker 2+ in the
 718 short time I spent on it, are already in Debian.  If you are looking
 719 for 3D printer "slicers" and want something already available in
 720 Debian, check out
 721 <a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
 722 <a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
 723 The latter is a fork of the former.</p>
 724
 725 <p>As usual, if you use Bitcoin and want to show your support of my
 726 activities, please send Bitcoin donations to my address
 727 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 728 </div>
 729       <div class="tags">
 730
 731
 732         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 733
 734
 735       </div>
 736     </div>
 737     <div class="padding"></div>
 738
 739     <div class="entry">
 740       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Mangler_du_en_skrue__eller_har_du_en_skrue_l_s_.html">Mangler du en skrue, eller har du en skrue løs?</a></div>
 741       <div class="date"> 4th October 2017</div>
 742       <div class="body">Når jeg holder på med ulike prosjekter, så trenger jeg stadig ulike
 743 skruer.  Det siste prosjektet jeg holder på med er å lage
 744 <a href="https://www.thingiverse.com/thing:676916">en boks til en
 745 HDMI-touch-skjerm</a> som skal brukes med Raspberry Pi.  Boksen settes
 746 sammen med skruer og bolter, og jeg har vært i tvil om hvor jeg kan
 747 få tak i de riktige skruene.  Clas Ohlson og Jernia i nærheten har
 748 sjelden hatt det jeg trenger.  Men her om dagen fikk jeg et fantastisk
 749 tips for oss som bor i Oslo.
 750 <a href="http://www.zachskruer.no/">Zachariassen Jernvare AS</a> i
 751 <a href="http://www.openstreetmap.org/?mlat=59.93421&mlon=10.76795#map=19/59.93421/10.76795">Hegermannsgate
 752 23A på Torshov</a> har et fantastisk utvalg, og åpent mellom 09:00 og
 753 17:00.  De selger skruer, muttere, bolter, skiver etc i løs vekt, og
 754 så langt har jeg fått alt jeg har lett etter.  De har i tillegg det
 755 meste av annen jernvare, som verktøy, lamper, ledninger, etc.  Jeg
 756 håper de har nok kunder til å holde det gående lenge, da dette er en
 757 butikk jeg kommer til å besøke ofte.  Butikken er et funn å ha i
 758 nabolaget for oss som liker å bygge litt selv. :)</p>
 759
 760 <p>Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til
 761 det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner
 762 til min adresse
 763 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 764 </div>
 765       <div class="tags">
 766
 767
 768         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 769
 770
 771       </div>
 772     </div>
 773     <div class="padding"></div>
 774
 775     <div class="entry">
 776       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Visualizing_GSM_radio_chatter_using_gr_gsm_and_Hopglass.html">Visualizing GSM radio chatter using gr-gsm and Hopglass</a></div>
 777       <div class="date">29th September 2017</div>
 778       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
 779 mobile cell towers.  And this radio chatter is available for anyone
 780 with a radio receiver capable of receiving them.  Details about the
 781 mobile phones with very good accuracy is of course collected by the
 782 phone companies, but this is not the topic of this blog post.  The
 783 mobile phone radio chatter make it possible to figure out when a cell
 784 phone is nearby, as it include the SIM card ID (IMSI).  By paying
 785 attention over time, one can see when a phone arrive and when it leave
 786 an area.  I believe it would be nice to make this information more
 787 available to the general public, to make more people aware of how
 788 their phones are announcing their whereabouts to anyone that care to
 789 listen.</p>
 790
 791 <p>I am very happy to report that we managed to get something
 792 visualizing this information up and running for
 793 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
 794 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
 795 library.  The solution is based on the
 796 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
 797 recipe for listening to GSM chatter</a> I posted a few days ago, and
 798 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
 799 Sone from the Computer Science department of the University of
 800 Oslo</a>.  The presentation will show the nearby mobile phones (aka
 801 IMSIs) as dots in a web browser graph, with lines to the dot
 802 representing mobile base station it is talking to. It was working in
 803 the lab yesterday, and was moved into place this morning.</p>
 804
 805 <p>We set up a fairly powerful desktop machine using Debian
 806 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
 807 connected and visualize the visible cell phone towers using an
 808 <a href="https://github.com/marlow925/hopglass">English version of
 809 Hopglass</a>.  A fairly powerfull machine is needed as the
 810 grgsm_livemon_headless processes from
 811 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
 812 the radio signal to data packages is quite CPU intensive.</p>
 813
 814 <p>The frequencies to listen to, are identified using a slightly
 815 patched scan-and-livemon (to set the --args values for each receiver),
 816 and the Hopglass data is generated using the
 817 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
 818 in my meshviewer-output branch</a>.  For some reason we could not get
 819 more than four SDRs working.  There is also a geographical map trying
 820 to show the location of the base stations, but I believe their
 821 coordinates are hardcoded to some random location in Germany, I
 822 believe.  The code should be replaced with code to look up location in
 823 a text file, a sqlite database or one of the online databases
 824 mentioned in
 825 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
 826 issue for the topic</a>.
 827
 828 <p>If this sound interesting, visit the stand at the festival!</p>
 829 </div>
 830       <div class="tags">
 831
 832
 833         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/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 834
 835
 836       </div>
 837     </div>
 838     <div class="padding"></div>
 839
 840     <div class="entry">
 841       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">Easier recipe to observe the cell phones around you</a></div>
 842       <div class="date">24th September 2017</div>
 843       <div class="body"><p>A little more than a month ago I wrote
 844 <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">how
 845 to observe the SIM card ID (aka IMSI number) of mobile phones talking
 846 to nearby mobile phone base stations using Debian GNU/Linux and a
 847 cheap USB software defined radio</a>, and thus being able to pinpoint
 848 the location of people and equipment (like cars and trains) with an
 849 accuracy of a few kilometer.  Since then we have worked to make the
 850 procedure even simpler, and it is now possible to do this without any
 851 manual frequency tuning and without building your own packages.</p>
 852
 853 <p>The <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a>
 854 package is now included in Debian testing and unstable, and the
 855 IMSI-catcher code no longer require root access to fetch and decode
 856 the GSM data collected using gr-gsm.</p>
 857
 858 <p>Here is an updated recipe, using packages built by Debian and a git
 859 clone of two python scripts:</p>
 860
 861 <ol>
 862
 863 <li>Start with a Debian machine running the Buster version (aka
 864   testing).</li>
 865
 866 <li>Run '<tt>apt install gr-gsm python-numpy python-scipy
 867   python-scapy</tt>' as root to install required packages.</li>
 868
 869 <li>Fetch the code decoding GSM packages using '<tt>git clone
 870   github.com/Oros42/IMSI-catcher.git</tt>'.</li>
 871
 872 <li>Insert USB software defined radio supported by GNU Radio.</li>
 873
 874 <li>Enter the IMSI-catcher directory and run '<tt>python
 875   scan-and-livemon</tt>' to locate the frequency of nearby base
 876   stations and start listening for GSM packages on one of them.</li>
 877
 878 <li>Enter the IMSI-catcher directory and run '<tt>python
 879   simple_IMSI-catcher.py</tt>' to display the collected information.</li>
 880
 881 </ol>
 882
 883 <p>Note, due to a bug somewhere the scan-and-livemon program (actually
 884 <a href="https://github.com/ptrkrysik/gr-gsm/issues/336">its underlying
 885 program grgsm_scanner</a>) do not work with the HackRF radio.  It does
 886 work with RTL 8232 and other similar USB radio receivers you can get
 887 very cheaply
 888 (<a href="https://www.ebay.com/sch/items/?_nkw=rtl+2832">for example
 889 from ebay</a>), so for now the solution is to scan using the RTL radio
 890 and only use HackRF for fetching GSM data.</p>
 891
 892 <p>As far as I can tell, a cell phone only show up on one of the
 893 frequencies at the time, so if you are going to track and count every
 894 cell phone around you, you need to listen to all the frequencies used.
 895 To listen to several frequencies, use the --numrecv argument to
 896 scan-and-livemon to use several receivers.  Further, I am not sure if
 897 phones using 3G or 4G will show as talking GSM to base stations, so
 898 this approach might not see all phones around you.  I typically see
 899 0-400 IMSI numbers an hour when looking around where I live.</p>
 900
 901 <p>I've tried to run the scanner on a
 902 <a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi 2 and 3
 903 running Debian Buster</a>, but the grgsm_livemon_headless process seem
 904 to be too CPU intensive to keep up.  When GNU Radio print 'O' to
 905 stdout, I am told there it is caused by a buffer overflow between the
 906 radio and GNU Radio, caused by the program being unable to read the
 907 GSM data fast enough.  If you see a stream of 'O's from the terminal
 908 where you started scan-and-livemon, you need a give the process more
 909 CPU power.  Perhaps someone are able to optimize the code to a point
 910 where it become possible to set up RPi3 based GSM sniffers?  I tried
 911 using Raspbian instead of Debian, but there seem to be something wrong
 912 with GNU Radio on raspbian, causing glibc to abort().</p>
 913 </div>
 914       <div class="tags">
 915
 916
 917         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/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 918
 919
 920       </div>
 921     </div>
 922     <div class="padding"></div>
 923
 924     <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>
 925     <div id="sidebar">
 926
 927
 928
 929 <h2>Archive</h2>
 930 <ul>
 931
 932 <li>2017
 933 <ul>
 934
 935 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 936
 937 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 938
 939 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 940
 941 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 942
 943 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 944
 945 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 946
 947 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 948
 949 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 950
 951 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 952
 953 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 954
 955 </ul></li>
 956
 957 <li>2016
 958 <ul>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 961
 962 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 963
 964 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 965
 966 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 967
 968 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 969
 970 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 971
 972 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 973
 974 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 975
 976 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 977
 978 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 979
 980 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 981
 982 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 983
 984 </ul></li>
 985
 986 <li>2015
 987 <ul>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 990
 991 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 992
 993 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 994
 995 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 996
 997 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 998
 999 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
1000
1001 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
1002
1003 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
1004
1005 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
1006
1007 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
1008
1009 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
1010
1011 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
1012
1013 </ul></li>
1014
1015 <li>2014
1016 <ul>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
1023
1024 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
1025
1026 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
1027
1028 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
1029
1030 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
1031
1032 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
1033
1034 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
1035
1036 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
1037
1038 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
1039
1040 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
1041
1042 </ul></li>
1043
1044 <li>2013
1045 <ul>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
1052
1053 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
1054
1055 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
1056
1057 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
1058
1059 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
1060
1061 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
1062
1063 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
1064
1065 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
1066
1067 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
1068
1069 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
1070
1071 </ul></li>
1072
1073 <li>2012
1074 <ul>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
1081
1082 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
1083
1084 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
1085
1086 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
1087
1088 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
1089
1090 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
1091
1092 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
1093
1094 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
1095
1096 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
1097
1098 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1099
1100 </ul></li>
1101
1102 <li>2011
1103 <ul>
1104
1105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1106
1107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1108
1109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1110
1111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1112
1113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1114
1115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1116
1117 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1118
1119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1120
1121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1122
1123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1124
1125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1126
1127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1128
1129 </ul></li>
1130
1131 <li>2010
1132 <ul>
1133
1134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1135
1136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1137
1138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1139
1140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1141
1142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1143
1144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1145
1146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1147
1148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1149
1150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1151
1152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1153
1154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1155
1156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1157
1158 </ul></li>
1159
1160 <li>2009
1161 <ul>
1162
1163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1164
1165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1166
1167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1168
1169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1170
1171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1172
1173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1174
1175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1176
1177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1178
1179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1180
1181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1182
1183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1184
1185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1186
1187 </ul></li>
1188
1189 <li>2008
1190 <ul>
1191
1192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1193
1194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1195
1196 </ul></li>
1197
1198 </ul>
1199
1200
1201
1202 <h2>Tags</h2>
1203 <ul>
1204
1205  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
1206
1207  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1208
1209  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1210
1211  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1212
1213  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
1214
1215  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
1216
1217  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1218
1219  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1220
1221  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
1222
1223  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1224
1225  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1226
1227  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1228
1229  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1230
1231  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
1232
1233  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1234
1235  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (360)</a></li>
1236
1237  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1238
1239  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1240
1241  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
1242
1243  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1244
1245  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1246
1247  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1248
1249  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1250
1251  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
1252
1253  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1254
1255  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1256
1257  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1258
1259  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1260
1261  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1262
1263  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1264
1265  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1266
1267  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
1268
1269  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
1270
1271  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
1272
1273  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
1274
1275  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1276
1277  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1278
1279  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (67)</a></li>
1280
1281  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
1282
1283  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1284
1285  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1286
1287  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1288
1289  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1290
1291  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1292
1293  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1294
1295  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
1296
1297  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1298
1299  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
1300
1301  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1302
1303  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1304
1305  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1306
1307  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1308
1309  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1310
1311  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
1312
1313  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1314
1315  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1316
1317  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1318
1319  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (5)</a></li>
1320
1321  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
1322
1323  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1324
1325  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
1326
1327 </ul>
1328
1329
1330     </div>
1331     <p style="text-align: right">
1332  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1333 </p>
1334
1335   </body>
1336 </html>