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   6     <title>Petter Reinholdtsen</title>
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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/Legal_to_share_more_than_3000_movies_listed_on_IMDB_.html">Legal to share more than 3000 movies listed on IMDB?</a></div>
  24       <div class="date">18th November 2017</div>
  25       <div class="body"><p>A month ago, I blogged about my work to automatically check the
  26 copyright status of IMDB entries, and try to count the number of
  27 movies listed in IMDB where it is legal to distribute it the Internet.
  28 I have continued to look for good data sources, and identified a few
  29 more.  The code used to extract information from various data sources
  30 is available in
  31 <ahref="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
  32 git repository</a>, currently available from github.</p>
  33
  34 <p>So far I have identified 3186 unique IMDB title IDs.  To gain
  35 better understanding of the structure of the data set, I created a
  36 histogram of the year associated with each movie (typically release
  37 year).  It is interesting to notice where the peaks and dips in the
  38 graph are located.  I wonder why they are placed there.  I suspect
  39 World Word II caused the dip around 1940, but what caused the peak
  40 around 2010?</p>
  41
  42 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-11-18-verk-i-det-fri-filmer.png" /></p>
  43
  44 <p>I've so far identified ten sources for IMDB title IDs for movies in
  45 the public domain or with a free license.  This is the statistics
  46 reported when running 'make stats' in the git repository:</p>
  47
  48 <pre>
  49   249 entries (    6 unique) with and   288 without IMDB title ID in free-movies-archive-org-butter.json
  50  2301 entries (  540 unique) with and     0 without IMDB title ID in free-movies-archive-org-wikidata.json
  51   830 entries (   29 unique) with and     0 without IMDB title ID in free-movies-icheckmovies-archive-mochard.json
  52  2109 entries (  377 unique) with and     0 without IMDB title ID in free-movies-imdb-pd.json
  53   291 entries (  122 unique) with and     0 without IMDB title ID in free-movies-letterboxd-pd.json
  54   144 entries (  135 unique) with and     0 without IMDB title ID in free-movies-manual.json
  55   350 entries (    1 unique) with and   801 without IMDB title ID in free-movies-publicdomainmovies.json
  56     4 entries (    0 unique) with and   124 without IMDB title ID in free-movies-publicdomainreview.json
  57   698 entries (  119 unique) with and   118 without IMDB title ID in free-movies-publicdomaintorrents.json
  58     8 entries (    8 unique) with and   196 without IMDB title ID in free-movies-vodo.json
  59  3186 unique IMDB title IDs in total
  60 </pre>
  61
  62 <p>The entries without IMDB title ID are candidates to increase the
  63 data set, but might equally well be duplicates of entries already
  64 listed with IMDB title ID in one of the other sources, or represent
  65 movies that lack a IMDB title ID.  I've seen examples of all these
  66 situations when peeking at the entries without IMDB title ID.  Based
  67 on these data sources, the lower bound for movies listed in IMDB that
  68 are legal to distribute on the Internet is between 3186 and 4713.
  69
  70 <p>It would be great for improving the accuracy of this measurement,
  71 if the various sources added IMDB title ID to their metadata.  I have
  72 tried to reach the people behind the various sources to ask if they
  73 are interested in doing this, without any positive replies so far.
  74 Perhaps you can help me get in touch with the people behind VODO,
  75 Public Domain Torrents, Public Domain Movies and Public Domain Review
  76 to try to convince them to add more metadata to their movie entries?</p>
  77
  78 <p>Another way you could help is by adding pages to Wikipedia about
  79 movies that are legal to distribute on the Internet.  If such page
  80 exist and include a link to both IMDB and The Internet Archive, the
  81 script used to generate free-movies-archive-org-wikidata.json should
  82 pick up the mapping as soon as wikidata is updates.</p>
  83 </div>
  84       <div class="tags">
  85
  86
  87         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>.
  88
  89
  90       </div>
  91     </div>
  92     <div class="padding"></div>
  93
  94     <div class="entry">
  95       <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>
  96       <div class="date"> 1st November 2017</div>
  97       <div class="body"><p>If you care about how fault tolerant your storage is, you might
  98 find these articles and papers interesting.  They have formed how I
  99 think of when designing a storage system.</p>
 100
 101 <ul>
 102
 103 <li>USENIX :login; <a
 104 href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
 105 Does Not Imply Fault Tolerance.  Analysis of Distributed Storage
 106 Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
 107 Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
 108 H. Arpaci-Dusseau</li>
 109
 110 <li>ZDNet
 111 <a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
 112 RAID 5 stops working in 2009</a> by Robin Harris</li>
 113
 114 <li>ZDNet
 115 <a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
 116 RAID 6 stops working in 2019</a> by Robin Harris</li>
 117
 118 <li>USENIX FAST'07
 119 <a href="http://research.google.com/archive/disk_failures.pdf">Failure
 120 Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
 121 Wolf-Dietrich Weber and Luiz André Barroso</li>
 122
 123 <li>USENIX ;login: <a
 124 href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
 125 Integrity.  Finding Truth in a World of Guesses and Lies</a> by Doug
 126 Hughes</li>
 127
 128 <li>USENIX FAST'08
 129 <a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
 130 Analysis of Data Corruption in the Storage Stack</a> by
 131 L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
 132 Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
 133
 134 <li>USENIX FAST'07 <a
 135 href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
 136 failures in the real world: what does an MTTF of 1,000,000 hours mean
 137 to you?</a> by B. Schroeder and G. A. Gibson.</li>
 138
 139 <li>USENIX ;login: <a
 140 href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
 141 Disks the Dominant Contributor for Storage Failures?  A Comprehensive
 142 Study of Storage Subsystem Failure Characteristics</a> by Weihang
 143 Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
 144
 145 <li>SIGMETRICS 2007
 146 <a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
 147 analysis of latent sector errors in disk drives</a> by
 148 L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
 149
 150 </ul>
 151
 152 <p>Several of these research papers are based on data collected from
 153 hundred thousands or millions of disk, and their findings are eye
 154 opening.  The short story is simply do not implicitly trust RAID or
 155 redundant storage systems.  Details matter.  And unfortunately there
 156 are few options on Linux addressing all the identified issues.  Both
 157 ZFS and Btrfs are doing a fairly good job, but have legal and
 158 practical issues on their own.  I wonder how cluster file systems like
 159 Ceph do in this regard.  After all, there is an old saying, you know
 160 you have a distributed system when the crash of a computer you have
 161 never heard of stops you from getting any work done.  The same holds
 162 true if fault tolerance do not work.</p>
 163
 164 <p>Just remember, in the end, it do not matter how redundant, or how
 165 fault tolerant your storage is, if you do not continuously monitor its
 166 status to detect and replace failed disks.</p>
 167 </div>
 168       <div class="tags">
 169
 170
 171         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>.
 172
 173
 174       </div>
 175     </div>
 176     <div class="padding"></div>
 177
 178     <div class="entry">
 179       <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>
 180       <div class="date">31st October 2017</div>
 181       <div class="body"><p>I was surprised today to learn that a friend in academia did not
 182 know there are easily available web services available for writing
 183 LaTeX documents as a team.  I thought it was common knowledge, but to
 184 make sure at least my readers are aware of it, I would like to mention
 185 these useful services for writing LaTeX documents.  Some of them even
 186 provide a WYSIWYG editor to ease writing even further.</p>
 187
 188 <p>There are two commercial services available,
 189 <a href="https://sharelatex.com">ShareLaTeX</a> and
 190 <a href="https://overleaf.com">Overleaf</a>.  They are very easy to
 191 use.  Just start a new document, select which publisher to write for
 192 (ie which LaTeX style to use), and start writing.  Note, these two
 193 have announced their intention to join forces, so soon it will only be
 194 one joint service.  I've used both for different documents, and they
 195 work just fine.  While
 196 <a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
 197 software</a>, while the latter is not.  According to <a
 198 href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
 199 announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
 200 base maintained as free software.</p>
 201
 202 But these two are not the only alternatives.
 203 <a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
 204 software solution with <a href="https://github.com/fiduswriter">the
 205 source available on github</a>.  I have not used it myself.  Several
 206 others can be found on the nice
 207 <a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
 208 web service</a>.
 209
 210 <p>If you like Google Docs or Etherpad, but would like to write
 211 documents in LaTeX, you should check out these services.  You can even
 212 host your own, if you want to. :)</p>
 213
 214 </div>
 215       <div class="tags">
 216
 217
 218         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 219
 220
 221       </div>
 222     </div>
 223     <div class="padding"></div>
 224
 225     <div class="entry">
 226       <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>
 227       <div class="date">25th October 2017</div>
 228       <div class="body"><p>Recently, I needed to automatically check the copyright status of a
 229 set of <a href="http://www.imdb.com/">The Internet Movie database
 230 (IMDB)</a> entries, to figure out which one of the movies they refer
 231 to can be freely distributed on the Internet.  This proved to be
 232 harder than it sounds.  IMDB for sure list movies without any
 233 copyright protection, where the copyright protection has expired or
 234 where the movie is lisenced using a permissive license like one from
 235 Creative Commons.  These are mixed with copyright protected movies,
 236 and there seem to be no way to separate these classes of movies using
 237 the information in IMDB.</p>
 238
 239 <p>First I tried to look up entries manually in IMDB,
 240 <a href="https://www.wikipedia.org/">Wikipedia</a> and
 241 <a href="https://www.archive.org/">The Internet Archive</a>, to get a
 242 feel how to do this.  It is hard to know for sure using these sources,
 243 but it should be possible to be reasonable confident a movie is "out
 244 of copyright" with a few hours work per movie.  As I needed to check
 245 almost 20,000 entries, this approach was not sustainable.  I simply
 246 can not work around the clock for about 6 years to check this data
 247 set.</p>
 248
 249 <p>I asked the people behind The Internet Archive if they could
 250 introduce a new metadata field in their metadata XML for IMDB ID, but
 251 was told that they leave it completely to the uploaders to update the
 252 metadata.  Some of the metadata entries had IMDB links in the
 253 description, but I found no way to download all metadata files in bulk
 254 to locate those ones and put that approach aside.</p>
 255
 256 <p>In the process I noticed several Wikipedia articles about movies
 257 had links to both IMDB and The Internet Archive, and it occured to me
 258 that I could use the Wikipedia RDF data set to locate entries with
 259 both, to at least get a lower bound on the number of movies on The
 260 Internet Archive with a IMDB ID.  This is useful based on the
 261 assumption that movies distributed by The Internet Archive can be
 262 legally distributed on the Internet.  With some help from the RDF
 263 community (thank you DanC), I was able to come up with this query to
 264 pass to <a href="https://query.wikidata.org/">the SPARQL interface on
 265 Wikidata</a>:
 266
 267 <p><pre>
 268 SELECT ?work ?imdb ?ia ?when ?label
 269 WHERE
 270 {
 271   ?work wdt:P31/wdt:P279* wd:Q11424.
 272   ?work wdt:P345 ?imdb.
 273   ?work wdt:P724 ?ia.
 274   OPTIONAL {
 275         ?work wdt:P577 ?when.
 276         ?work rdfs:label ?label.
 277         FILTER(LANG(?label) = "en").
 278   }
 279 }
 280 </pre></p>
 281
 282 <p>If I understand the query right, for every film entry anywhere in
 283 Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
 284 when the movie was released and its English title, if either or both
 285 of the latter two are available.  At the moment the result set contain
 286 2338 entries.  Of course, it depend on volunteers including both
 287 correct IMDB and The Internet Archive IDs in the wikipedia articles
 288 for the movie.  It should be noted that the result will include
 289 duplicates if the movie have entries in several languages.  There are
 290 some bogus entries, either because The Internet Archive ID contain a
 291 typo or because the movie is not available from The Internet Archive.
 292 I did not verify the IMDB IDs, as I am unsure how to do that
 293 automatically.</p>
 294
 295 <p>I wrote a small python script to extract the data set from Wikidata
 296 and check if the XML metadata for the movie is available from The
 297 Internet Archive, and after around 1.5 hour it produced a list of 2097
 298 free movies and their IMDB ID.  In total, 171 entries in Wikidata lack
 299 the refered Internet Archive entry.  I assume the 70 "disappearing"
 300 entries (ie 2338-2097-171) are duplicate entries.</p>
 301
 302 <p>This is not too bad, given that The Internet Archive report to
 303 contain <a href="https://archive.org/details/feature_films">5331
 304 feature films</a> at the moment, but it also mean more than 3000
 305 movies are missing on Wikipedia or are missing the pair of references
 306 on Wikipedia.</p>
 307
 308 <p>I was curious about the distribution by release year, and made a
 309 little graph to show how the amount of free movies is spread over the
 310 years:<p>
 311
 312 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
 313
 314 <p>I expect the relative distribution of the remaining 3000 movies to
 315 be similar.</p>
 316
 317 <p>If you want to help, and want to ensure Wikipedia can be used to
 318 cross reference The Internet Archive and The Internet Movie Database,
 319 please make sure entries like this are listed under the "External
 320 links" heading on the Wikipedia article for the movie:</p>
 321
 322 <p><pre>
 323 * {{Internet Archive film|id=FightingLady}}
 324 * {{IMDb title|id=0036823|title=The Fighting Lady}}
 325 </pre></p>
 326
 327 <p>Please verify the links on the final page, to make sure you did not
 328 introduce a typo.</p>
 329
 330 <p>Here is the complete list, if you want to correct the 171
 331 identified Wikipedia entries with broken links to The Internet
 332 Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
 333 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 334 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 335 <a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
 336 <a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
 337 <a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
 338 <a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
 339 <a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
 340 <a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
 341 <a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
 342 <a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
 343 <a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
 344 <a href="http://www.wikidata.org/entity/Q1479751">Q1479751</a>,
 345 <a href="http://www.wikidata.org/entity/Q1497200">Q1497200</a>,
 346 <a href="http://www.wikidata.org/entity/Q1498122">Q1498122</a>,
 347 <a href="http://www.wikidata.org/entity/Q865973">Q865973</a>,
 348 <a href="http://www.wikidata.org/entity/Q834269">Q834269</a>,
 349 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 350 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 351 <a href="http://www.wikidata.org/entity/Q1548193">Q1548193</a>,
 352 <a href="http://www.wikidata.org/entity/Q499031">Q499031</a>,
 353 <a href="http://www.wikidata.org/entity/Q1564769">Q1564769</a>,
 354 <a href="http://www.wikidata.org/entity/Q1585239">Q1585239</a>,
 355 <a href="http://www.wikidata.org/entity/Q1585569">Q1585569</a>,
 356 <a href="http://www.wikidata.org/entity/Q1624236">Q1624236</a>,
 357 <a href="http://www.wikidata.org/entity/Q4796595">Q4796595</a>,
 358 <a href="http://www.wikidata.org/entity/Q4853469">Q4853469</a>,
 359 <a href="http://www.wikidata.org/entity/Q4873046">Q4873046</a>,
 360 <a href="http://www.wikidata.org/entity/Q915016">Q915016</a>,
 361 <a href="http://www.wikidata.org/entity/Q4660396">Q4660396</a>,
 362 <a href="http://www.wikidata.org/entity/Q4677708">Q4677708</a>,
 363 <a href="http://www.wikidata.org/entity/Q4738449">Q4738449</a>,
 364 <a href="http://www.wikidata.org/entity/Q4756096">Q4756096</a>,
 365 <a href="http://www.wikidata.org/entity/Q4766785">Q4766785</a>,
 366 <a href="http://www.wikidata.org/entity/Q880357">Q880357</a>,
 367 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 368 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 369 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 370 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 371 <a href="http://www.wikidata.org/entity/Q1194170">Q1194170</a>,
 372 <a href="http://www.wikidata.org/entity/Q940014">Q940014</a>,
 373 <a href="http://www.wikidata.org/entity/Q946863">Q946863</a>,
 374 <a href="http://www.wikidata.org/entity/Q172837">Q172837</a>,
 375 <a href="http://www.wikidata.org/entity/Q573077">Q573077</a>,
 376 <a href="http://www.wikidata.org/entity/Q1219005">Q1219005</a>,
 377 <a href="http://www.wikidata.org/entity/Q1219599">Q1219599</a>,
 378 <a href="http://www.wikidata.org/entity/Q1643798">Q1643798</a>,
 379 <a href="http://www.wikidata.org/entity/Q1656352">Q1656352</a>,
 380 <a href="http://www.wikidata.org/entity/Q1659549">Q1659549</a>,
 381 <a href="http://www.wikidata.org/entity/Q1660007">Q1660007</a>,
 382 <a href="http://www.wikidata.org/entity/Q1698154">Q1698154</a>,
 383 <a href="http://www.wikidata.org/entity/Q1737980">Q1737980</a>,
 384 <a href="http://www.wikidata.org/entity/Q1877284">Q1877284</a>,
 385 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 386 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 387 <a href="http://www.wikidata.org/entity/Q1199451">Q1199451</a>,
 388 <a href="http://www.wikidata.org/entity/Q1211871">Q1211871</a>,
 389 <a href="http://www.wikidata.org/entity/Q1212179">Q1212179</a>,
 390 <a href="http://www.wikidata.org/entity/Q1238382">Q1238382</a>,
 391 <a href="http://www.wikidata.org/entity/Q4906454">Q4906454</a>,
 392 <a href="http://www.wikidata.org/entity/Q320219">Q320219</a>,
 393 <a href="http://www.wikidata.org/entity/Q1148649">Q1148649</a>,
 394 <a href="http://www.wikidata.org/entity/Q645094">Q645094</a>,
 395 <a href="http://www.wikidata.org/entity/Q5050350">Q5050350</a>,
 396 <a href="http://www.wikidata.org/entity/Q5166548">Q5166548</a>,
 397 <a href="http://www.wikidata.org/entity/Q2677926">Q2677926</a>,
 398 <a href="http://www.wikidata.org/entity/Q2698139">Q2698139</a>,
 399 <a href="http://www.wikidata.org/entity/Q2707305">Q2707305</a>,
 400 <a href="http://www.wikidata.org/entity/Q2740725">Q2740725</a>,
 401 <a href="http://www.wikidata.org/entity/Q2024780">Q2024780</a>,
 402 <a href="http://www.wikidata.org/entity/Q2117418">Q2117418</a>,
 403 <a href="http://www.wikidata.org/entity/Q2138984">Q2138984</a>,
 404 <a href="http://www.wikidata.org/entity/Q1127992">Q1127992</a>,
 405 <a href="http://www.wikidata.org/entity/Q1058087">Q1058087</a>,
 406 <a href="http://www.wikidata.org/entity/Q1070484">Q1070484</a>,
 407 <a href="http://www.wikidata.org/entity/Q1080080">Q1080080</a>,
 408 <a href="http://www.wikidata.org/entity/Q1090813">Q1090813</a>,
 409 <a href="http://www.wikidata.org/entity/Q1251918">Q1251918</a>,
 410 <a href="http://www.wikidata.org/entity/Q1254110">Q1254110</a>,
 411 <a href="http://www.wikidata.org/entity/Q1257070">Q1257070</a>,
 412 <a href="http://www.wikidata.org/entity/Q1257079">Q1257079</a>,
 413 <a href="http://www.wikidata.org/entity/Q1197410">Q1197410</a>,
 414 <a href="http://www.wikidata.org/entity/Q1198423">Q1198423</a>,
 415 <a href="http://www.wikidata.org/entity/Q706951">Q706951</a>,
 416 <a href="http://www.wikidata.org/entity/Q723239">Q723239</a>,
 417 <a href="http://www.wikidata.org/entity/Q2079261">Q2079261</a>,
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 502 <a href="http://www.wikidata.org/entity/Q774474">Q774474</a></p>
 503 </div>
 504       <div class="tags">
 505
 506
 507         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>.
 508
 509
 510       </div>
 511     </div>
 512     <div class="padding"></div>
 513
 514     <div class="entry">
 515       <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>
 516       <div class="date">14th October 2017</div>
 517       <div class="body"><p>I find it fascinating how many of the people being locked inside
 518 the proposed border wall between USA and Mexico support the idea.  The
 519 proposal to keep Mexicans out reminds me of
 520 <a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
 521 propaganda twist from the East Germany government</a> calling the wall
 522 the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
 523 that the wall was erected to keep enemies from creeping into East
 524 Germany, while it was obvious to the people locked inside it that it
 525 was erected to keep the people from escaping.</p>
 526
 527 <p>Do the people in USA supporting this wall really believe it is a
 528 one way wall, only keeping people on the outside from getting in,
 529 while not keeping people in the inside from getting out?</p>
 530 </div>
 531       <div class="tags">
 532
 533
 534         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 535
 536
 537       </div>
 538     </div>
 539     <div class="padding"></div>
 540
 541     <div class="entry">
 542       <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>
 543       <div class="date"> 9th October 2017</div>
 544       <div class="body"><p>At my nearby maker space,
 545 <a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
 546 was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
 547 on Windows and MacOS X than Linux, because the software involved had
 548 to be manually compiled and set up on Linux while premade packages
 549 worked out of the box on Windows and MacOS X.  I found this annoying,
 550 as the software involved,
 551 <a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
 552 and should be trivial to get up and running on Linux if someone took
 553 the time to package it for the relevant distributions.  I even found
 554 <a href="https://bugs.debian.org/706656">a request for adding into
 555 Debian</a> from 2013, which had seem some activity over the years but
 556 never resulted in the software showing up in Debian.  So a few days
 557 ago I offered my help to try to improve the situation.</p>
 558
 559 <p>Now I am very happy to see that all the packages required by a
 560 working Cura in Debian are uploaded into Debian and waiting in the NEW
 561 queue for the ftpmasters to have a look.  You can track the progress
 562 on
 563 <a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
 564 status page for the 3D printer team</a>.</p>
 565
 566 <p>The uploaded packages are a bit behind upstream, and was uploaded
 567 now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
 568 queue</a> while we work up updating the packages to the latest
 569 upstream version.</p>
 570
 571 <p>On a related note, two competitors for Cura, which I found harder
 572 to use and was unable to configure correctly for Ultimaker 2+ in the
 573 short time I spent on it, are already in Debian.  If you are looking
 574 for 3D printer "slicers" and want something already available in
 575 Debian, check out
 576 <a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
 577 <a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
 578 The latter is a fork of the former.</p>
 579 </div>
 580       <div class="tags">
 581
 582
 583         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>.
 584
 585
 586       </div>
 587     </div>
 588     <div class="padding"></div>
 589
 590     <div class="entry">
 591       <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>
 592       <div class="date"> 4th October 2017</div>
 593       <div class="body">Når jeg holder på med ulike prosjekter, så trenger jeg stadig ulike
 594 skruer.  Det siste prosjektet jeg holder på med er å lage
 595 <a href="https://www.thingiverse.com/thing:676916">en boks til en
 596 HDMI-touch-skjerm</a> som skal brukes med Raspberry Pi.  Boksen settes
 597 sammen med skruer og bolter, og jeg har vært i tvil om hvor jeg kan
 598 få tak i de riktige skruene.  Clas Ohlson og Jernia i nærheten har
 599 sjelden hatt det jeg trenger.  Men her om dagen fikk jeg et fantastisk
 600 tips for oss som bor i Oslo.
 601 <a href="http://www.zachskruer.no/">Zachariassen Jernvare AS</a> i
 602 <a href="http://www.openstreetmap.org/?mlat=59.93421&mlon=10.76795#map=19/59.93421/10.76795">Hegermannsgate
 603 23A på Torshov</a> har et fantastisk utvalg, og åpent mellom 09:00 og
 604 17:00.  De selger skruer, muttere, bolter, skiver etc i løs vekt, og
 605 så langt har jeg fått alt jeg har lett etter.  De har i tillegg det
 606 meste av annen jernvare, som verktøy, lamper, ledninger, etc.  Jeg
 607 håper de har nok kunder til å holde det gående lenge, da dette er en
 608 butikk jeg kommer til å besøke ofte.  Butikken er et funn å ha i
 609 nabolaget for oss som liker å bygge litt selv. :)</p>
 610 </div>
 611       <div class="tags">
 612
 613
 614         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 615
 616
 617       </div>
 618     </div>
 619     <div class="padding"></div>
 620
 621     <div class="entry">
 622       <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>
 623       <div class="date">29th September 2017</div>
 624       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
 625 mobile cell towers.  And this radio chatter is available for anyone
 626 with a radio receiver capable of receiving them.  Details about the
 627 mobile phones with very good accuracy is of course collected by the
 628 phone companies, but this is not the topic of this blog post.  The
 629 mobile phone radio chatter make it possible to figure out when a cell
 630 phone is nearby, as it include the SIM card ID (IMSI).  By paying
 631 attention over time, one can see when a phone arrive and when it leave
 632 an area.  I believe it would be nice to make this information more
 633 available to the general public, to make more people aware of how
 634 their phones are announcing their whereabouts to anyone that care to
 635 listen.</p>
 636
 637 <p>I am very happy to report that we managed to get something
 638 visualizing this information up and running for
 639 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
 640 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
 641 library.  The solution is based on the
 642 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
 643 recipe for listening to GSM chatter</a> I posted a few days ago, and
 644 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
 645 Sone from the Computer Science department of the University of
 646 Oslo</a>.  The presentation will show the nearby mobile phones (aka
 647 IMSIs) as dots in a web browser graph, with lines to the dot
 648 representing mobile base station it is talking to. It was working in
 649 the lab yesterday, and was moved into place this morning.</p>
 650
 651 <p>We set up a fairly powerful desktop machine using Debian
 652 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
 653 connected and visualize the visible cell phone towers using an
 654 <a href="https://github.com/marlow925/hopglass">English version of
 655 Hopglass</a>.  A fairly powerfull machine is needed as the
 656 grgsm_livemon_headless processes from
 657 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
 658 the radio signal to data packages is quite CPU intensive.</p>
 659
 660 <p>The frequencies to listen to, are identified using a slightly
 661 patched scan-and-livemon (to set the --args values for each receiver),
 662 and the Hopglass data is generated using the
 663 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
 664 in my meshviewer-output branch</a>.  For some reason we could not get
 665 more than four SDRs working.  There is also a geographical map trying
 666 to show the location of the base stations, but I believe their
 667 coordinates are hardcoded to some random location in Germany, I
 668 believe.  The code should be replaced with code to look up location in
 669 a text file, a sqlite database or one of the online databases
 670 mentioned in
 671 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
 672 issue for the topic</a>.
 673
 674 <p>If this sound interesting, visit the stand at the festival!</p>
 675 </div>
 676       <div class="tags">
 677
 678
 679         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>.
 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/Easier_recipe_to_observe_the_cell_phones_around_you.html">Easier recipe to observe the cell phones around you</a></div>
 688       <div class="date">24th September 2017</div>
 689       <div class="body"><p>A little more than a month ago I wrote
 690 <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">how
 691 to observe the SIM card ID (aka IMSI number) of mobile phones talking
 692 to nearby mobile phone base stations using Debian GNU/Linux and a
 693 cheap USB software defined radio</a>, and thus being able to pinpoint
 694 the location of people and equipment (like cars and trains) with an
 695 accuracy of a few kilometer.  Since then we have worked to make the
 696 procedure even simpler, and it is now possible to do this without any
 697 manual frequency tuning and without building your own packages.</p>
 698
 699 <p>The <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a>
 700 package is now included in Debian testing and unstable, and the
 701 IMSI-catcher code no longer require root access to fetch and decode
 702 the GSM data collected using gr-gsm.</p>
 703
 704 <p>Here is an updated recipe, using packages built by Debian and a git
 705 clone of two python scripts:</p>
 706
 707 <ol>
 708
 709 <li>Start with a Debian machine running the Buster version (aka
 710   testing).</li>
 711
 712 <li>Run '<tt>apt install gr-gsm python-numpy python-scipy
 713   python-scapy</tt>' as root to install required packages.</li>
 714
 715 <li>Fetch the code decoding GSM packages using '<tt>git clone
 716   github.com/Oros42/IMSI-catcher.git</tt>'.</li>
 717
 718 <li>Insert USB software defined radio supported by GNU Radio.</li>
 719
 720 <li>Enter the IMSI-catcher directory and run '<tt>python
 721   scan-and-livemon</tt>' to locate the frequency of nearby base
 722   stations and start listening for GSM packages on one of them.</li>
 723
 724 <li>Enter the IMSI-catcher directory and run '<tt>python
 725   simple_IMSI-catcher.py</tt>' to display the collected information.</li>
 726
 727 </ol>
 728
 729 <p>Note, due to a bug somewhere the scan-and-livemon program (actually
 730 <a href="https://github.com/ptrkrysik/gr-gsm/issues/336">its underlying
 731 program grgsm_scanner</a>) do not work with the HackRF radio.  It does
 732 work with RTL 8232 and other similar USB radio receivers you can get
 733 very cheaply
 734 (<a href="https://www.ebay.com/sch/items/?_nkw=rtl+2832">for example
 735 from ebay</a>), so for now the solution is to scan using the RTL radio
 736 and only use HackRF for fetching GSM data.</p>
 737
 738 <p>As far as I can tell, a cell phone only show up on one of the
 739 frequencies at the time, so if you are going to track and count every
 740 cell phone around you, you need to listen to all the frequencies used.
 741 To listen to several frequencies, use the --numrecv argument to
 742 scan-and-livemon to use several receivers.  Further, I am not sure if
 743 phones using 3G or 4G will show as talking GSM to base stations, so
 744 this approach might not see all phones around you.  I typically see
 745 0-400 IMSI numbers an hour when looking around where I live.</p>
 746
 747 <p>I've tried to run the scanner on a
 748 <a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi 2 and 3
 749 running Debian Buster</a>, but the grgsm_livemon_headless process seem
 750 to be too CPU intensive to keep up.  When GNU Radio print 'O' to
 751 stdout, I am told there it is caused by a buffer overflow between the
 752 radio and GNU Radio, caused by the program being unable to read the
 753 GSM data fast enough.  If you see a stream of 'O's from the terminal
 754 where you started scan-and-livemon, you need a give the process more
 755 CPU power.  Perhaps someone are able to optimize the code to a point
 756 where it become possible to set up RPi3 based GSM sniffers?  I tried
 757 using Raspbian instead of Debian, but there seem to be something wrong
 758 with GNU Radio on raspbian, causing glibc to abort().</p>
 759 </div>
 760       <div class="tags">
 761
 762
 763         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>.
 764
 765
 766       </div>
 767     </div>
 768     <div class="padding"></div>
 769
 770     <div class="entry">
 771       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Datalagringsdirektivet_kaster_skygger_over_H_yre_og_Arbeiderpartiet.html">Datalagringsdirektivet kaster skygger over Høyre og Arbeiderpartiet</a></div>
 772       <div class="date"> 7th September 2017</div>
 773       <div class="body"><p>For noen dager siden publiserte Jon Wessel-Aas en bloggpost om
 774 «<a href="http://www.uhuru.biz/?p=1821">Konklusjonen om datalagring som
 775 EU-kommisjonen ikke ville at vi skulle få se</a>».  Det er en
 776 interessant gjennomgang av EU-domstolens syn på snurpenotovervåkning
 777 av befolkningen, som er klar på at det er i strid med
 778 EU-lovgivingen.</p>
 779
 780 <p>Valgkampen går for fullt i Norge, og om noen få dager er siste
 781 frist for å avgi stemme.  En ting er sikkert, Høyre og Arbeiderpartiet
 782 får ikke min stemme
 783 <a href="http://people.skolelinux.org/pere/blog/Datalagringsdirektivet_gj_r_at_Oslo_H_yre_og_Arbeiderparti_ikke_f_r_min_stemme_i__r.html">denne
 784 gangen heller</a>.  Jeg har ikke glemt at de tvang igjennom loven som
 785 skulle pålegge alle data- og teletjenesteleverandører å overvåke alle
 786 sine kunder.  En lov som er vedtatt, og aldri opphevet igjen.</p>
 787
 788 <p>Det er tydelig fra diskusjonen rundt grenseløs digital overvåkning
 789 (eller "Digital Grenseforsvar" som det kalles i Orvellisk nytale) at
 790 hverken Høyre og Arbeiderpartiet har noen prinsipielle sperrer mot å
 791 overvåke hele befolkningen, og diskusjonen så langt tyder på at flere
 792 av de andre partiene heller ikke har det. Mange av
 793 <a href="https://data.holderdeord.no/votes/1301946411e">de som stemte
 794 for Datalagringsdirektivet i Stortinget</a> (64 fra Arbeiderpartiet,
 795 25 fra Høyre) er fortsatt aktive og argumenterer fortsatt for å radere
 796 vekk mer av innbyggernes privatsfære.</p>
 797
 798 <p>Når myndighetene demonstrerer sin mistillit til folket, tror jeg
 799 folket selv bør legge litt innsats i å verne sitt privatliv, ved å ta
 800 i bruk ende-til-ende-kryptert kommunikasjon med sine kjente og kjære,
 801 og begrense hvor mye privat informasjon som deles med uvedkommende.
 802 Det er jo ingenting som tyder på at myndighetene kommer til å være vår
 803 privatsfære.
 804 <a href="http://people.skolelinux.org/pere/blog/How_to_talk_with_your_loved_ones_in_private.html">Det
 805 er mange muligheter</a>.  Selv har jeg litt sans for
 806 <a href="https://ring.cx/">Ring</a>, som er basert på p2p-teknologi
 807 uten sentral kontroll, er fri programvare, og støtter meldinger, tale
 808 og video.  Systemet er tilgjengelig ut av boksen fra
 809 <a href="https://tracker.debian.org/pkg/ring">Debian</a> og
 810 <a href="https://launchpad.net/ubuntu/+source/ring">Ubuntu</a>, og det
 811 finnes pakker for Android, MacOSX og Windows.  Foreløpig er det få
 812 brukere med Ring, slik at jeg også bruker
 813 <a href="https://signal.org/">Signal</a> som nettleserutvidelse.</p>
 814 </div>
 815       <div class="tags">
 816
 817
 818         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/dld">dld</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>, <a href="http://people.skolelinux.org/pere/blog/tags/valg">valg</a>.
 819
 820
 821       </div>
 822     </div>
 823     <div class="padding"></div>
 824
 825     <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>
 826     <div id="sidebar">
 827
 828
 829
 830 <h2>Archive</h2>
 831 <ul>
 832
 833 <li>2017
 834 <ul>
 835
 836 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 837
 838 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 839
 840 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 841
 842 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 843
 844 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 845
 846 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 847
 848 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 849
 850 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 851
 852 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 853
 854 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (2)</a></li>
 855
 856 </ul></li>
 857
 858 <li>2016
 859 <ul>
 860
 861 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 862
 863 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 864
 865 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 866
 867 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 868
 869 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 870
 871 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 872
 873 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 874
 875 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 876
 877 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 878
 879 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 880
 881 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 882
 883 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 884
 885 </ul></li>
 886
 887 <li>2015
 888 <ul>
 889
 890 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 891
 892 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 893
 894 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 895
 896 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 897
 898 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 899
 900 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 901
 902 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 903
 904 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 905
 906 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 907
 908 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 909
 910 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 911
 912 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 913
 914 </ul></li>
 915
 916 <li>2014
 917 <ul>
 918
 919 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 920
 921 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 922
 923 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 924
 925 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 926
 927 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 928
 929 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 930
 931 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 932
 933 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 934
 935 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 936
 937 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 938
 939 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 940
 941 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 942
 943 </ul></li>
 944
 945 <li>2013
 946 <ul>
 947
 948 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 949
 950 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 951
 952 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 953
 954 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 957
 958 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 961
 962 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 963
 964 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 965
 966 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 967
 968 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 969
 970 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 971
 972 </ul></li>
 973
 974 <li>2012
 975 <ul>
 976
 977 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 978
 979 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 980
 981 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 982
 983 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 984
 985 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 986
 987 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 990
 991 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 992
 993 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 994
 995 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 996
 997 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 998
 999 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1000
1001 </ul></li>
1002
1003 <li>2011
1004 <ul>
1005
1006 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1007
1008 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1009
1010 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1011
1012 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1023
1024 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1025
1026 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1027
1028 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1029
1030 </ul></li>
1031
1032 <li>2010
1033 <ul>
1034
1035 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1036
1037 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1038
1039 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1040
1041 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1052
1053 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1054
1055 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1056
1057 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1058
1059 </ul></li>
1060
1061 <li>2009
1062 <ul>
1063
1064 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1065
1066 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1067
1068 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1069
1070 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1081
1082 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1083
1084 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1085
1086 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1087
1088 </ul></li>
1089
1090 <li>2008
1091 <ul>
1092
1093 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1094
1095 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1096
1097 </ul></li>
1098
1099 </ul>
1100
1101
1102
1103 <h2>Tags</h2>
1104 <ul>
1105
1106  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
1107
1108  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1109
1110  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1111
1112  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1113
1114  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
1115
1116  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
1117
1118  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1119
1120  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1121
1122  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
1123
1124  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1125
1126  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1127
1128  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1129
1130  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1131
1132  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
1133
1134  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1135
1136  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (359)</a></li>
1137
1138  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1139
1140  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1141
1142  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
1143
1144  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1145
1146  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1147
1148  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1149
1150  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1151
1152  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
1153
1154  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1155
1156  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1157
1158  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1159
1160  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1161
1162  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1163
1164  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1165
1166  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1167
1168  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
1169
1170  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
1171
1172  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
1173
1174  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
1175
1176  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1177
1178  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1179
1180  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (66)</a></li>
1181
1182  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
1183
1184  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1185
1186  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1187
1188  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1189
1190  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1191
1192  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1193
1194  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1195
1196  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
1197
1198  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1199
1200  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
1201
1202  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1203
1204  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1205
1206  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1207
1208  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1209
1210  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1211
1212  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
1213
1214  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1215
1216  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1217
1218  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1219
1220  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
1221
1222  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1223
1224  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
1225
1226 </ul>
1227
1228
1229     </div>
1230     <p style="text-align: right">
1231  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1232 </p>
1233
1234   </body>
1235 </html>