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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 </div>
 133       <div class="tags">
 134
 135
 136         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>.
 137
 138
 139       </div>
 140     </div>
 141     <div class="padding"></div>
 142
 143     <div class="entry">
 144       <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>
 145       <div class="date">18th November 2017</div>
 146       <div class="body"><p>A month ago, I blogged about my work to
 147 <a href="http://people.skolelinux.org/pere/blog/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">automatically
 148 check the copyright status of IMDB entries</a>, and try to count the
 149 number of movies listed in IMDB that is legal to distribute on the
 150 Internet.  I have continued to look for good data sources, and
 151 identified a few more.  The code used to extract information from
 152 various data sources is available in
 153 <a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
 154 git repository</a>, currently available from github.</p>
 155
 156 <p>So far I have identified 3186 unique IMDB title IDs.  To gain
 157 better understanding of the structure of the data set, I created a
 158 histogram of the year associated with each movie (typically release
 159 year).  It is interesting to notice where the peaks and dips in the
 160 graph are located.  I wonder why they are placed there.  I suspect
 161 World War II caused the dip around 1940, but what caused the peak
 162 around 2010?</p>
 163
 164 <p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2017-11-18-verk-i-det-fri-filmer.png" /></p>
 165
 166 <p>I've so far identified ten sources for IMDB title IDs for movies in
 167 the public domain or with a free license.  This is the statistics
 168 reported when running 'make stats' in the git repository:</p>
 169
 170 <pre>
 171   249 entries (    6 unique) with and   288 without IMDB title ID in free-movies-archive-org-butter.json
 172  2301 entries (  540 unique) with and     0 without IMDB title ID in free-movies-archive-org-wikidata.json
 173   830 entries (   29 unique) with and     0 without IMDB title ID in free-movies-icheckmovies-archive-mochard.json
 174  2109 entries (  377 unique) with and     0 without IMDB title ID in free-movies-imdb-pd.json
 175   291 entries (  122 unique) with and     0 without IMDB title ID in free-movies-letterboxd-pd.json
 176   144 entries (  135 unique) with and     0 without IMDB title ID in free-movies-manual.json
 177   350 entries (    1 unique) with and   801 without IMDB title ID in free-movies-publicdomainmovies.json
 178     4 entries (    0 unique) with and   124 without IMDB title ID in free-movies-publicdomainreview.json
 179   698 entries (  119 unique) with and   118 without IMDB title ID in free-movies-publicdomaintorrents.json
 180     8 entries (    8 unique) with and   196 without IMDB title ID in free-movies-vodo.json
 181  3186 unique IMDB title IDs in total
 182 </pre>
 183
 184 <p>The entries without IMDB title ID are candidates to increase the
 185 data set, but might equally well be duplicates of entries already
 186 listed with IMDB title ID in one of the other sources, or represent
 187 movies that lack a IMDB title ID.  I've seen examples of all these
 188 situations when peeking at the entries without IMDB title ID.  Based
 189 on these data sources, the lower bound for movies listed in IMDB that
 190 are legal to distribute on the Internet is between 3186 and 4713.
 191
 192 <p>It would be great for improving the accuracy of this measurement,
 193 if the various sources added IMDB title ID to their metadata.  I have
 194 tried to reach the people behind the various sources to ask if they
 195 are interested in doing this, without any replies so far.  Perhaps you
 196 can help me get in touch with the people behind VODO, Public Domain
 197 Torrents, Public Domain Movies and Public Domain Review to try to
 198 convince them to add more metadata to their movie entries?</p>
 199
 200 <p>Another way you could help is by adding pages to Wikipedia about
 201 movies that are legal to distribute on the Internet.  If such page
 202 exist and include a link to both IMDB and The Internet Archive, the
 203 script used to generate free-movies-archive-org-wikidata.json should
 204 pick up the mapping as soon as wikidata is updates.</p>
 205
 206 <p>As usual, if you use Bitcoin and want to show your support of my
 207 activities, please send Bitcoin donations to my address
 208 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 209 </div>
 210       <div class="tags">
 211
 212
 213         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>.
 214
 215
 216       </div>
 217     </div>
 218     <div class="padding"></div>
 219
 220     <div class="entry">
 221       <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>
 222       <div class="date"> 1st November 2017</div>
 223       <div class="body"><p>If you care about how fault tolerant your storage is, you might
 224 find these articles and papers interesting.  They have formed how I
 225 think of when designing a storage system.</p>
 226
 227 <ul>
 228
 229 <li>USENIX :login; <a
 230 href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
 231 Does Not Imply Fault Tolerance.  Analysis of Distributed Storage
 232 Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
 233 Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
 234 H. Arpaci-Dusseau</li>
 235
 236 <li>ZDNet
 237 <a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
 238 RAID 5 stops working in 2009</a> by Robin Harris</li>
 239
 240 <li>ZDNet
 241 <a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
 242 RAID 6 stops working in 2019</a> by Robin Harris</li>
 243
 244 <li>USENIX FAST'07
 245 <a href="http://research.google.com/archive/disk_failures.pdf">Failure
 246 Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
 247 Wolf-Dietrich Weber and Luiz André Barroso</li>
 248
 249 <li>USENIX ;login: <a
 250 href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
 251 Integrity.  Finding Truth in a World of Guesses and Lies</a> by Doug
 252 Hughes</li>
 253
 254 <li>USENIX FAST'08
 255 <a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
 256 Analysis of Data Corruption in the Storage Stack</a> by
 257 L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
 258 Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
 259
 260 <li>USENIX FAST'07 <a
 261 href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
 262 failures in the real world: what does an MTTF of 1,000,000 hours mean
 263 to you?</a> by B. Schroeder and G. A. Gibson.</li>
 264
 265 <li>USENIX ;login: <a
 266 href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
 267 Disks the Dominant Contributor for Storage Failures?  A Comprehensive
 268 Study of Storage Subsystem Failure Characteristics</a> by Weihang
 269 Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
 270
 271 <li>SIGMETRICS 2007
 272 <a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
 273 analysis of latent sector errors in disk drives</a> by
 274 L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
 275
 276 </ul>
 277
 278 <p>Several of these research papers are based on data collected from
 279 hundred thousands or millions of disk, and their findings are eye
 280 opening.  The short story is simply do not implicitly trust RAID or
 281 redundant storage systems.  Details matter.  And unfortunately there
 282 are few options on Linux addressing all the identified issues.  Both
 283 ZFS and Btrfs are doing a fairly good job, but have legal and
 284 practical issues on their own.  I wonder how cluster file systems like
 285 Ceph do in this regard.  After all, there is an old saying, you know
 286 you have a distributed system when the crash of a computer you have
 287 never heard of stops you from getting any work done.  The same holds
 288 true if fault tolerance do not work.</p>
 289
 290 <p>Just remember, in the end, it do not matter how redundant, or how
 291 fault tolerant your storage is, if you do not continuously monitor its
 292 status to detect and replace failed disks.</p>
 293
 294 <p>As usual, if you use Bitcoin and want to show your support of my
 295 activities, please send Bitcoin donations to my address
 296 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 297 </div>
 298       <div class="tags">
 299
 300
 301         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>.
 302
 303
 304       </div>
 305     </div>
 306     <div class="padding"></div>
 307
 308     <div class="entry">
 309       <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>
 310       <div class="date">31st October 2017</div>
 311       <div class="body"><p>I was surprised today to learn that a friend in academia did not
 312 know there are easily available web services available for writing
 313 LaTeX documents as a team.  I thought it was common knowledge, but to
 314 make sure at least my readers are aware of it, I would like to mention
 315 these useful services for writing LaTeX documents.  Some of them even
 316 provide a WYSIWYG editor to ease writing even further.</p>
 317
 318 <p>There are two commercial services available,
 319 <a href="https://sharelatex.com">ShareLaTeX</a> and
 320 <a href="https://overleaf.com">Overleaf</a>.  They are very easy to
 321 use.  Just start a new document, select which publisher to write for
 322 (ie which LaTeX style to use), and start writing.  Note, these two
 323 have announced their intention to join forces, so soon it will only be
 324 one joint service.  I've used both for different documents, and they
 325 work just fine.  While
 326 <a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
 327 software</a>, while the latter is not.  According to <a
 328 href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
 329 announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
 330 base maintained as free software.</p>
 331
 332 But these two are not the only alternatives.
 333 <a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
 334 software solution with <a href="https://github.com/fiduswriter">the
 335 source available on github</a>.  I have not used it myself.  Several
 336 others can be found on the nice
 337 <a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
 338 web service</a>.
 339
 340 <p>If you like Google Docs or Etherpad, but would like to write
 341 documents in LaTeX, you should check out these services.  You can even
 342 host your own, if you want to. :)</p>
 343
 344 <p>As usual, if you use Bitcoin and want to show your support of my
 345 activities, please send Bitcoin donations to my address
 346 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 347 </div>
 348       <div class="tags">
 349
 350
 351         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 352
 353
 354       </div>
 355     </div>
 356     <div class="padding"></div>
 357
 358     <div class="entry">
 359       <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>
 360       <div class="date">25th October 2017</div>
 361       <div class="body"><p>Recently, I needed to automatically check the copyright status of a
 362 set of <a href="http://www.imdb.com/">The Internet Movie database
 363 (IMDB)</a> entries, to figure out which one of the movies they refer
 364 to can be freely distributed on the Internet.  This proved to be
 365 harder than it sounds.  IMDB for sure list movies without any
 366 copyright protection, where the copyright protection has expired or
 367 where the movie is lisenced using a permissive license like one from
 368 Creative Commons.  These are mixed with copyright protected movies,
 369 and there seem to be no way to separate these classes of movies using
 370 the information in IMDB.</p>
 371
 372 <p>First I tried to look up entries manually in IMDB,
 373 <a href="https://www.wikipedia.org/">Wikipedia</a> and
 374 <a href="https://www.archive.org/">The Internet Archive</a>, to get a
 375 feel how to do this.  It is hard to know for sure using these sources,
 376 but it should be possible to be reasonable confident a movie is "out
 377 of copyright" with a few hours work per movie.  As I needed to check
 378 almost 20,000 entries, this approach was not sustainable.  I simply
 379 can not work around the clock for about 6 years to check this data
 380 set.</p>
 381
 382 <p>I asked the people behind The Internet Archive if they could
 383 introduce a new metadata field in their metadata XML for IMDB ID, but
 384 was told that they leave it completely to the uploaders to update the
 385 metadata.  Some of the metadata entries had IMDB links in the
 386 description, but I found no way to download all metadata files in bulk
 387 to locate those ones and put that approach aside.</p>
 388
 389 <p>In the process I noticed several Wikipedia articles about movies
 390 had links to both IMDB and The Internet Archive, and it occured to me
 391 that I could use the Wikipedia RDF data set to locate entries with
 392 both, to at least get a lower bound on the number of movies on The
 393 Internet Archive with a IMDB ID.  This is useful based on the
 394 assumption that movies distributed by The Internet Archive can be
 395 legally distributed on the Internet.  With some help from the RDF
 396 community (thank you DanC), I was able to come up with this query to
 397 pass to <a href="https://query.wikidata.org/">the SPARQL interface on
 398 Wikidata</a>:
 399
 400 <p><pre>
 401 SELECT ?work ?imdb ?ia ?when ?label
 402 WHERE
 403 {
 404   ?work wdt:P31/wdt:P279* wd:Q11424.
 405   ?work wdt:P345 ?imdb.
 406   ?work wdt:P724 ?ia.
 407   OPTIONAL {
 408         ?work wdt:P577 ?when.
 409         ?work rdfs:label ?label.
 410         FILTER(LANG(?label) = "en").
 411   }
 412 }
 413 </pre></p>
 414
 415 <p>If I understand the query right, for every film entry anywhere in
 416 Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
 417 when the movie was released and its English title, if either or both
 418 of the latter two are available.  At the moment the result set contain
 419 2338 entries.  Of course, it depend on volunteers including both
 420 correct IMDB and The Internet Archive IDs in the wikipedia articles
 421 for the movie.  It should be noted that the result will include
 422 duplicates if the movie have entries in several languages.  There are
 423 some bogus entries, either because The Internet Archive ID contain a
 424 typo or because the movie is not available from The Internet Archive.
 425 I did not verify the IMDB IDs, as I am unsure how to do that
 426 automatically.</p>
 427
 428 <p>I wrote a small python script to extract the data set from Wikidata
 429 and check if the XML metadata for the movie is available from The
 430 Internet Archive, and after around 1.5 hour it produced a list of 2097
 431 free movies and their IMDB ID.  In total, 171 entries in Wikidata lack
 432 the refered Internet Archive entry.  I assume the 70 "disappearing"
 433 entries (ie 2338-2097-171) are duplicate entries.</p>
 434
 435 <p>This is not too bad, given that The Internet Archive report to
 436 contain <a href="https://archive.org/details/feature_films">5331
 437 feature films</a> at the moment, but it also mean more than 3000
 438 movies are missing on Wikipedia or are missing the pair of references
 439 on Wikipedia.</p>
 440
 441 <p>I was curious about the distribution by release year, and made a
 442 little graph to show how the amount of free movies is spread over the
 443 years:<p>
 444
 445 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
 446
 447 <p>I expect the relative distribution of the remaining 3000 movies to
 448 be similar.</p>
 449
 450 <p>If you want to help, and want to ensure Wikipedia can be used to
 451 cross reference The Internet Archive and The Internet Movie Database,
 452 please make sure entries like this are listed under the "External
 453 links" heading on the Wikipedia article for the movie:</p>
 454
 455 <p><pre>
 456 * {{Internet Archive film|id=FightingLady}}
 457 * {{IMDb title|id=0036823|title=The Fighting Lady}}
 458 </pre></p>
 459
 460 <p>Please verify the links on the final page, to make sure you did not
 461 introduce a typo.</p>
 462
 463 <p>Here is the complete list, if you want to correct the 171
 464 identified Wikipedia entries with broken links to The Internet
 465 Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
 466 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 467 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 468 <a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
 469 <a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
 470 <a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
 471 <a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
 472 <a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
 473 <a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
 474 <a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
 475 <a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
 476 <a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
 477 <a href="http://www.wikidata.org/entity/Q1479751">Q1479751</a>,
 478 <a href="http://www.wikidata.org/entity/Q1497200">Q1497200</a>,
 479 <a href="http://www.wikidata.org/entity/Q1498122">Q1498122</a>,
 480 <a href="http://www.wikidata.org/entity/Q865973">Q865973</a>,
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 636
 637 <p>As usual, if you use Bitcoin and want to show your support of my
 638 activities, please send Bitcoin donations to my address
 639 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 640 </div>
 641       <div class="tags">
 642
 643
 644         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>.
 645
 646
 647       </div>
 648     </div>
 649     <div class="padding"></div>
 650
 651     <div class="entry">
 652       <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>
 653       <div class="date">14th October 2017</div>
 654       <div class="body"><p>I find it fascinating how many of the people being locked inside
 655 the proposed border wall between USA and Mexico support the idea.  The
 656 proposal to keep Mexicans out reminds me of
 657 <a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
 658 propaganda twist from the East Germany government</a> calling the wall
 659 the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
 660 that the wall was erected to keep enemies from creeping into East
 661 Germany, while it was obvious to the people locked inside it that it
 662 was erected to keep the people from escaping.</p>
 663
 664 <p>Do the people in USA supporting this wall really believe it is a
 665 one way wall, only keeping people on the outside from getting in,
 666 while not keeping people in the inside from getting out?</p>
 667
 668 <p>As usual, if you use Bitcoin and want to show your support of my
 669 activities, please send Bitcoin donations to my address
 670 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 671 </div>
 672       <div class="tags">
 673
 674
 675         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 676
 677
 678       </div>
 679     </div>
 680     <div class="padding"></div>
 681
 682     <div class="entry">
 683       <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>
 684       <div class="date"> 9th October 2017</div>
 685       <div class="body"><p>At my nearby maker space,
 686 <a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
 687 was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
 688 on Windows and MacOS X than Linux, because the software involved had
 689 to be manually compiled and set up on Linux while premade packages
 690 worked out of the box on Windows and MacOS X.  I found this annoying,
 691 as the software involved,
 692 <a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
 693 and should be trivial to get up and running on Linux if someone took
 694 the time to package it for the relevant distributions.  I even found
 695 <a href="https://bugs.debian.org/706656">a request for adding into
 696 Debian</a> from 2013, which had seem some activity over the years but
 697 never resulted in the software showing up in Debian.  So a few days
 698 ago I offered my help to try to improve the situation.</p>
 699
 700 <p>Now I am very happy to see that all the packages required by a
 701 working Cura in Debian are uploaded into Debian and waiting in the NEW
 702 queue for the ftpmasters to have a look.  You can track the progress
 703 on
 704 <a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
 705 status page for the 3D printer team</a>.</p>
 706
 707 <p>The uploaded packages are a bit behind upstream, and was uploaded
 708 now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
 709 queue</a> while we work up updating the packages to the latest
 710 upstream version.</p>
 711
 712 <p>On a related note, two competitors for Cura, which I found harder
 713 to use and was unable to configure correctly for Ultimaker 2+ in the
 714 short time I spent on it, are already in Debian.  If you are looking
 715 for 3D printer "slicers" and want something already available in
 716 Debian, check out
 717 <a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
 718 <a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
 719 The latter is a fork of the former.</p>
 720
 721 <p>As usual, if you use Bitcoin and want to show your support of my
 722 activities, please send Bitcoin donations to my address
 723 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 724 </div>
 725       <div class="tags">
 726
 727
 728         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>.
 729
 730
 731       </div>
 732     </div>
 733     <div class="padding"></div>
 734
 735     <div class="entry">
 736       <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>
 737       <div class="date"> 4th October 2017</div>
 738       <div class="body">Når jeg holder på med ulike prosjekter, så trenger jeg stadig ulike
 739 skruer.  Det siste prosjektet jeg holder på med er å lage
 740 <a href="https://www.thingiverse.com/thing:676916">en boks til en
 741 HDMI-touch-skjerm</a> som skal brukes med Raspberry Pi.  Boksen settes
 742 sammen med skruer og bolter, og jeg har vært i tvil om hvor jeg kan
 743 få tak i de riktige skruene.  Clas Ohlson og Jernia i nærheten har
 744 sjelden hatt det jeg trenger.  Men her om dagen fikk jeg et fantastisk
 745 tips for oss som bor i Oslo.
 746 <a href="http://www.zachskruer.no/">Zachariassen Jernvare AS</a> i
 747 <a href="http://www.openstreetmap.org/?mlat=59.93421&mlon=10.76795#map=19/59.93421/10.76795">Hegermannsgate
 748 23A på Torshov</a> har et fantastisk utvalg, og åpent mellom 09:00 og
 749 17:00.  De selger skruer, muttere, bolter, skiver etc i løs vekt, og
 750 så langt har jeg fått alt jeg har lett etter.  De har i tillegg det
 751 meste av annen jernvare, som verktøy, lamper, ledninger, etc.  Jeg
 752 håper de har nok kunder til å holde det gående lenge, da dette er en
 753 butikk jeg kommer til å besøke ofte.  Butikken er et funn å ha i
 754 nabolaget for oss som liker å bygge litt selv. :)</p>
 755
 756 <p>Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til
 757 det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner
 758 til min adresse
 759 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 760 </div>
 761       <div class="tags">
 762
 763
 764         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 765
 766
 767       </div>
 768     </div>
 769     <div class="padding"></div>
 770
 771     <div class="entry">
 772       <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>
 773       <div class="date">29th September 2017</div>
 774       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
 775 mobile cell towers.  And this radio chatter is available for anyone
 776 with a radio receiver capable of receiving them.  Details about the
 777 mobile phones with very good accuracy is of course collected by the
 778 phone companies, but this is not the topic of this blog post.  The
 779 mobile phone radio chatter make it possible to figure out when a cell
 780 phone is nearby, as it include the SIM card ID (IMSI).  By paying
 781 attention over time, one can see when a phone arrive and when it leave
 782 an area.  I believe it would be nice to make this information more
 783 available to the general public, to make more people aware of how
 784 their phones are announcing their whereabouts to anyone that care to
 785 listen.</p>
 786
 787 <p>I am very happy to report that we managed to get something
 788 visualizing this information up and running for
 789 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
 790 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
 791 library.  The solution is based on the
 792 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
 793 recipe for listening to GSM chatter</a> I posted a few days ago, and
 794 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
 795 Sone from the Computer Science department of the University of
 796 Oslo</a>.  The presentation will show the nearby mobile phones (aka
 797 IMSIs) as dots in a web browser graph, with lines to the dot
 798 representing mobile base station it is talking to. It was working in
 799 the lab yesterday, and was moved into place this morning.</p>
 800
 801 <p>We set up a fairly powerful desktop machine using Debian
 802 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
 803 connected and visualize the visible cell phone towers using an
 804 <a href="https://github.com/marlow925/hopglass">English version of
 805 Hopglass</a>.  A fairly powerfull machine is needed as the
 806 grgsm_livemon_headless processes from
 807 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
 808 the radio signal to data packages is quite CPU intensive.</p>
 809
 810 <p>The frequencies to listen to, are identified using a slightly
 811 patched scan-and-livemon (to set the --args values for each receiver),
 812 and the Hopglass data is generated using the
 813 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
 814 in my meshviewer-output branch</a>.  For some reason we could not get
 815 more than four SDRs working.  There is also a geographical map trying
 816 to show the location of the base stations, but I believe their
 817 coordinates are hardcoded to some random location in Germany, I
 818 believe.  The code should be replaced with code to look up location in
 819 a text file, a sqlite database or one of the online databases
 820 mentioned in
 821 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
 822 issue for the topic</a>.
 823
 824 <p>If this sound interesting, visit the stand at the festival!</p>
 825 </div>
 826       <div class="tags">
 827
 828
 829         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>.
 830
 831
 832       </div>
 833     </div>
 834     <div class="padding"></div>
 835
 836     <div class="entry">
 837       <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>
 838       <div class="date">24th September 2017</div>
 839       <div class="body"><p>A little more than a month ago I wrote
 840 <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">how
 841 to observe the SIM card ID (aka IMSI number) of mobile phones talking
 842 to nearby mobile phone base stations using Debian GNU/Linux and a
 843 cheap USB software defined radio</a>, and thus being able to pinpoint
 844 the location of people and equipment (like cars and trains) with an
 845 accuracy of a few kilometer.  Since then we have worked to make the
 846 procedure even simpler, and it is now possible to do this without any
 847 manual frequency tuning and without building your own packages.</p>
 848
 849 <p>The <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a>
 850 package is now included in Debian testing and unstable, and the
 851 IMSI-catcher code no longer require root access to fetch and decode
 852 the GSM data collected using gr-gsm.</p>
 853
 854 <p>Here is an updated recipe, using packages built by Debian and a git
 855 clone of two python scripts:</p>
 856
 857 <ol>
 858
 859 <li>Start with a Debian machine running the Buster version (aka
 860   testing).</li>
 861
 862 <li>Run '<tt>apt install gr-gsm python-numpy python-scipy
 863   python-scapy</tt>' as root to install required packages.</li>
 864
 865 <li>Fetch the code decoding GSM packages using '<tt>git clone
 866   github.com/Oros42/IMSI-catcher.git</tt>'.</li>
 867
 868 <li>Insert USB software defined radio supported by GNU Radio.</li>
 869
 870 <li>Enter the IMSI-catcher directory and run '<tt>python
 871   scan-and-livemon</tt>' to locate the frequency of nearby base
 872   stations and start listening for GSM packages on one of them.</li>
 873
 874 <li>Enter the IMSI-catcher directory and run '<tt>python
 875   simple_IMSI-catcher.py</tt>' to display the collected information.</li>
 876
 877 </ol>
 878
 879 <p>Note, due to a bug somewhere the scan-and-livemon program (actually
 880 <a href="https://github.com/ptrkrysik/gr-gsm/issues/336">its underlying
 881 program grgsm_scanner</a>) do not work with the HackRF radio.  It does
 882 work with RTL 8232 and other similar USB radio receivers you can get
 883 very cheaply
 884 (<a href="https://www.ebay.com/sch/items/?_nkw=rtl+2832">for example
 885 from ebay</a>), so for now the solution is to scan using the RTL radio
 886 and only use HackRF for fetching GSM data.</p>
 887
 888 <p>As far as I can tell, a cell phone only show up on one of the
 889 frequencies at the time, so if you are going to track and count every
 890 cell phone around you, you need to listen to all the frequencies used.
 891 To listen to several frequencies, use the --numrecv argument to
 892 scan-and-livemon to use several receivers.  Further, I am not sure if
 893 phones using 3G or 4G will show as talking GSM to base stations, so
 894 this approach might not see all phones around you.  I typically see
 895 0-400 IMSI numbers an hour when looking around where I live.</p>
 896
 897 <p>I've tried to run the scanner on a
 898 <a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi 2 and 3
 899 running Debian Buster</a>, but the grgsm_livemon_headless process seem
 900 to be too CPU intensive to keep up.  When GNU Radio print 'O' to
 901 stdout, I am told there it is caused by a buffer overflow between the
 902 radio and GNU Radio, caused by the program being unable to read the
 903 GSM data fast enough.  If you see a stream of 'O's from the terminal
 904 where you started scan-and-livemon, you need a give the process more
 905 CPU power.  Perhaps someone are able to optimize the code to a point
 906 where it become possible to set up RPi3 based GSM sniffers?  I tried
 907 using Raspbian instead of Debian, but there seem to be something wrong
 908 with GNU Radio on raspbian, causing glibc to abort().</p>
 909 </div>
 910       <div class="tags">
 911
 912
 913         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>.
 914
 915
 916       </div>
 917     </div>
 918     <div class="padding"></div>
 919
 920     <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>
 921     <div id="sidebar">
 922
 923
 924
 925 <h2>Archive</h2>
 926 <ul>
 927
 928 <li>2017
 929 <ul>
 930
 931 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 932
 933 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 934
 935 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 936
 937 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 938
 939 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 940
 941 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 942
 943 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 944
 945 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 946
 947 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 948
 949 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 950
 951 </ul></li>
 952
 953 <li>2016
 954 <ul>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 957
 958 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 961
 962 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 963
 964 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 965
 966 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 967
 968 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 969
 970 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 971
 972 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 973
 974 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 975
 976 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 977
 978 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 979
 980 </ul></li>
 981
 982 <li>2015
 983 <ul>
 984
 985 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 986
 987 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 990
 991 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 992
 993 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 994
 995 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 996
 997 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 998
 999 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
1000
1001 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
1002
1003 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
1004
1005 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
1006
1007 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
1008
1009 </ul></li>
1010
1011 <li>2014
1012 <ul>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
1023
1024 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
1025
1026 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
1027
1028 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
1029
1030 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
1031
1032 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
1033
1034 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
1035
1036 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
1037
1038 </ul></li>
1039
1040 <li>2013
1041 <ul>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
1052
1053 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
1054
1055 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
1056
1057 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
1058
1059 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
1060
1061 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
1062
1063 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
1064
1065 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
1066
1067 </ul></li>
1068
1069 <li>2012
1070 <ul>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
1081
1082 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
1083
1084 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
1085
1086 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
1087
1088 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
1089
1090 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
1091
1092 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
1093
1094 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1095
1096 </ul></li>
1097
1098 <li>2011
1099 <ul>
1100
1101 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1102
1103 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1104
1105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1106
1107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1108
1109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1110
1111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1112
1113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1114
1115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1116
1117 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1118
1119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1120
1121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1122
1123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1124
1125 </ul></li>
1126
1127 <li>2010
1128 <ul>
1129
1130 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1131
1132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1133
1134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1135
1136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1137
1138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1139
1140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1141
1142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1143
1144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1145
1146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1147
1148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1149
1150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1151
1152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1153
1154 </ul></li>
1155
1156 <li>2009
1157 <ul>
1158
1159 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1160
1161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1162
1163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1164
1165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1166
1167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1168
1169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1170
1171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1172
1173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1174
1175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1176
1177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1178
1179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1180
1181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1182
1183 </ul></li>
1184
1185 <li>2008
1186 <ul>
1187
1188 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1189
1190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1191
1192 </ul></li>
1193
1194 </ul>
1195
1196
1197
1198 <h2>Tags</h2>
1199 <ul>
1200
1201  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
1202
1203  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1204
1205  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1206
1207  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1208
1209  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
1210
1211  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
1212
1213  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1214
1215  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1216
1217  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
1218
1219  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1220
1221  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1222
1223  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1224
1225  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1226
1227  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
1228
1229  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1230
1231  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (360)</a></li>
1232
1233  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1234
1235  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1236
1237  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
1238
1239  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1240
1241  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1242
1243  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1244
1245  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1246
1247  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
1248
1249  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1250
1251  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1252
1253  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1254
1255  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1256
1257  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1258
1259  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1260
1261  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1262
1263  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
1264
1265  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
1266
1267  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
1268
1269  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
1270
1271  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1272
1273  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1274
1275  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (67)</a></li>
1276
1277  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
1278
1279  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1280
1281  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1282
1283  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1284
1285  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1286
1287  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1288
1289  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1290
1291  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
1292
1293  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1294
1295  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
1296
1297  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1298
1299  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1300
1301  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1302
1303  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1304
1305  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1306
1307  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
1308
1309  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1310
1311  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1312
1313  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1314
1315  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (5)</a></li>
1316
1317  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
1318
1319  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1320
1321  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
1322
1323 </ul>
1324
1325
1326     </div>
1327     <p style="text-align: right">
1328  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1329 </p>
1330
1331   </body>
1332 </html>