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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
  26 <a href="http://people.skolelinux.org/pere/blog/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">automatically
  27 check the copyright status of IMDB entries</a>, and try to count the
  28 number of movies listed in IMDB that is legal to distribute on the
  29 Internet.  I have continued to look for good data sources, and
  30 identified a few more.  The code used to extract information from
  31 various data sources is available in
  32 <a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
  33 git repository</a>, currently available from github.</p>
  34
  35 <p>So far I have identified 3186 unique IMDB title IDs.  To gain
  36 better understanding of the structure of the data set, I created a
  37 histogram of the year associated with each movie (typically release
  38 year).  It is interesting to notice where the peaks and dips in the
  39 graph are located.  I wonder why they are placed there.  I suspect
  40 World War II caused the dip around 1940, but what caused the peak
  41 around 2010?</p>
  42
  43 <p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2017-11-18-verk-i-det-fri-filmer.png" /></p>
  44
  45 <p>I've so far identified ten sources for IMDB title IDs for movies in
  46 the public domain or with a free license.  This is the statistics
  47 reported when running 'make stats' in the git repository:</p>
  48
  49 <pre>
  50   249 entries (    6 unique) with and   288 without IMDB title ID in free-movies-archive-org-butter.json
  51  2301 entries (  540 unique) with and     0 without IMDB title ID in free-movies-archive-org-wikidata.json
  52   830 entries (   29 unique) with and     0 without IMDB title ID in free-movies-icheckmovies-archive-mochard.json
  53  2109 entries (  377 unique) with and     0 without IMDB title ID in free-movies-imdb-pd.json
  54   291 entries (  122 unique) with and     0 without IMDB title ID in free-movies-letterboxd-pd.json
  55   144 entries (  135 unique) with and     0 without IMDB title ID in free-movies-manual.json
  56   350 entries (    1 unique) with and   801 without IMDB title ID in free-movies-publicdomainmovies.json
  57     4 entries (    0 unique) with and   124 without IMDB title ID in free-movies-publicdomainreview.json
  58   698 entries (  119 unique) with and   118 without IMDB title ID in free-movies-publicdomaintorrents.json
  59     8 entries (    8 unique) with and   196 without IMDB title ID in free-movies-vodo.json
  60  3186 unique IMDB title IDs in total
  61 </pre>
  62
  63 <p>The entries without IMDB title ID are candidates to increase the
  64 data set, but might equally well be duplicates of entries already
  65 listed with IMDB title ID in one of the other sources, or represent
  66 movies that lack a IMDB title ID.  I've seen examples of all these
  67 situations when peeking at the entries without IMDB title ID.  Based
  68 on these data sources, the lower bound for movies listed in IMDB that
  69 are legal to distribute on the Internet is between 3186 and 4713.
  70
  71 <p>It would be great for improving the accuracy of this measurement,
  72 if the various sources added IMDB title ID to their metadata.  I have
  73 tried to reach the people behind the various sources to ask if they
  74 are interested in doing this, without any replies so far.  Perhaps you
  75 can help me get in touch with the people behind VODO, Public Domain
  76 Torrents, Public Domain Movies and Public Domain Review to try to
  77 convince them to add more metadata to their movie entries?</p>
  78
  79 <p>Another way you could help is by adding pages to Wikipedia about
  80 movies that are legal to distribute on the Internet.  If such page
  81 exist and include a link to both IMDB and The Internet Archive, the
  82 script used to generate free-movies-archive-org-wikidata.json should
  83 pick up the mapping as soon as wikidata is updates.</p>
  84
  85 <p>As usual, if you use Bitcoin and want to show your support of my
  86 activities, please send Bitcoin donations to my address
  87 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  88 </div>
  89       <div class="tags">
  90
  91
  92         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>.
  93
  94
  95       </div>
  96     </div>
  97     <div class="padding"></div>
  98
  99     <div class="entry">
 100       <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>
 101       <div class="date"> 1st November 2017</div>
 102       <div class="body"><p>If you care about how fault tolerant your storage is, you might
 103 find these articles and papers interesting.  They have formed how I
 104 think of when designing a storage system.</p>
 105
 106 <ul>
 107
 108 <li>USENIX :login; <a
 109 href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
 110 Does Not Imply Fault Tolerance.  Analysis of Distributed Storage
 111 Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
 112 Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
 113 H. Arpaci-Dusseau</li>
 114
 115 <li>ZDNet
 116 <a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
 117 RAID 5 stops working in 2009</a> by Robin Harris</li>
 118
 119 <li>ZDNet
 120 <a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
 121 RAID 6 stops working in 2019</a> by Robin Harris</li>
 122
 123 <li>USENIX FAST'07
 124 <a href="http://research.google.com/archive/disk_failures.pdf">Failure
 125 Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
 126 Wolf-Dietrich Weber and Luiz André Barroso</li>
 127
 128 <li>USENIX ;login: <a
 129 href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
 130 Integrity.  Finding Truth in a World of Guesses and Lies</a> by Doug
 131 Hughes</li>
 132
 133 <li>USENIX FAST'08
 134 <a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
 135 Analysis of Data Corruption in the Storage Stack</a> by
 136 L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
 137 Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
 138
 139 <li>USENIX FAST'07 <a
 140 href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
 141 failures in the real world: what does an MTTF of 1,000,000 hours mean
 142 to you?</a> by B. Schroeder and G. A. Gibson.</li>
 143
 144 <li>USENIX ;login: <a
 145 href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
 146 Disks the Dominant Contributor for Storage Failures?  A Comprehensive
 147 Study of Storage Subsystem Failure Characteristics</a> by Weihang
 148 Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
 149
 150 <li>SIGMETRICS 2007
 151 <a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
 152 analysis of latent sector errors in disk drives</a> by
 153 L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
 154
 155 </ul>
 156
 157 <p>Several of these research papers are based on data collected from
 158 hundred thousands or millions of disk, and their findings are eye
 159 opening.  The short story is simply do not implicitly trust RAID or
 160 redundant storage systems.  Details matter.  And unfortunately there
 161 are few options on Linux addressing all the identified issues.  Both
 162 ZFS and Btrfs are doing a fairly good job, but have legal and
 163 practical issues on their own.  I wonder how cluster file systems like
 164 Ceph do in this regard.  After all, there is an old saying, you know
 165 you have a distributed system when the crash of a computer you have
 166 never heard of stops you from getting any work done.  The same holds
 167 true if fault tolerance do not work.</p>
 168
 169 <p>Just remember, in the end, it do not matter how redundant, or how
 170 fault tolerant your storage is, if you do not continuously monitor its
 171 status to detect and replace failed disks.</p>
 172
 173 <p>As usual, if you use Bitcoin and want to show your support of my
 174 activities, please send Bitcoin donations to my address
 175 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 176 </div>
 177       <div class="tags">
 178
 179
 180         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>.
 181
 182
 183       </div>
 184     </div>
 185     <div class="padding"></div>
 186
 187     <div class="entry">
 188       <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>
 189       <div class="date">31st October 2017</div>
 190       <div class="body"><p>I was surprised today to learn that a friend in academia did not
 191 know there are easily available web services available for writing
 192 LaTeX documents as a team.  I thought it was common knowledge, but to
 193 make sure at least my readers are aware of it, I would like to mention
 194 these useful services for writing LaTeX documents.  Some of them even
 195 provide a WYSIWYG editor to ease writing even further.</p>
 196
 197 <p>There are two commercial services available,
 198 <a href="https://sharelatex.com">ShareLaTeX</a> and
 199 <a href="https://overleaf.com">Overleaf</a>.  They are very easy to
 200 use.  Just start a new document, select which publisher to write for
 201 (ie which LaTeX style to use), and start writing.  Note, these two
 202 have announced their intention to join forces, so soon it will only be
 203 one joint service.  I've used both for different documents, and they
 204 work just fine.  While
 205 <a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
 206 software</a>, while the latter is not.  According to <a
 207 href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
 208 announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
 209 base maintained as free software.</p>
 210
 211 But these two are not the only alternatives.
 212 <a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
 213 software solution with <a href="https://github.com/fiduswriter">the
 214 source available on github</a>.  I have not used it myself.  Several
 215 others can be found on the nice
 216 <a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
 217 web service</a>.
 218
 219 <p>If you like Google Docs or Etherpad, but would like to write
 220 documents in LaTeX, you should check out these services.  You can even
 221 host your own, if you want to. :)</p>
 222
 223 <p>As usual, if you use Bitcoin and want to show your support of my
 224 activities, please send Bitcoin donations to my address
 225 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 226 </div>
 227       <div class="tags">
 228
 229
 230         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 231
 232
 233       </div>
 234     </div>
 235     <div class="padding"></div>
 236
 237     <div class="entry">
 238       <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>
 239       <div class="date">25th October 2017</div>
 240       <div class="body"><p>Recently, I needed to automatically check the copyright status of a
 241 set of <a href="http://www.imdb.com/">The Internet Movie database
 242 (IMDB)</a> entries, to figure out which one of the movies they refer
 243 to can be freely distributed on the Internet.  This proved to be
 244 harder than it sounds.  IMDB for sure list movies without any
 245 copyright protection, where the copyright protection has expired or
 246 where the movie is lisenced using a permissive license like one from
 247 Creative Commons.  These are mixed with copyright protected movies,
 248 and there seem to be no way to separate these classes of movies using
 249 the information in IMDB.</p>
 250
 251 <p>First I tried to look up entries manually in IMDB,
 252 <a href="https://www.wikipedia.org/">Wikipedia</a> and
 253 <a href="https://www.archive.org/">The Internet Archive</a>, to get a
 254 feel how to do this.  It is hard to know for sure using these sources,
 255 but it should be possible to be reasonable confident a movie is "out
 256 of copyright" with a few hours work per movie.  As I needed to check
 257 almost 20,000 entries, this approach was not sustainable.  I simply
 258 can not work around the clock for about 6 years to check this data
 259 set.</p>
 260
 261 <p>I asked the people behind The Internet Archive if they could
 262 introduce a new metadata field in their metadata XML for IMDB ID, but
 263 was told that they leave it completely to the uploaders to update the
 264 metadata.  Some of the metadata entries had IMDB links in the
 265 description, but I found no way to download all metadata files in bulk
 266 to locate those ones and put that approach aside.</p>
 267
 268 <p>In the process I noticed several Wikipedia articles about movies
 269 had links to both IMDB and The Internet Archive, and it occured to me
 270 that I could use the Wikipedia RDF data set to locate entries with
 271 both, to at least get a lower bound on the number of movies on The
 272 Internet Archive with a IMDB ID.  This is useful based on the
 273 assumption that movies distributed by The Internet Archive can be
 274 legally distributed on the Internet.  With some help from the RDF
 275 community (thank you DanC), I was able to come up with this query to
 276 pass to <a href="https://query.wikidata.org/">the SPARQL interface on
 277 Wikidata</a>:
 278
 279 <p><pre>
 280 SELECT ?work ?imdb ?ia ?when ?label
 281 WHERE
 282 {
 283   ?work wdt:P31/wdt:P279* wd:Q11424.
 284   ?work wdt:P345 ?imdb.
 285   ?work wdt:P724 ?ia.
 286   OPTIONAL {
 287         ?work wdt:P577 ?when.
 288         ?work rdfs:label ?label.
 289         FILTER(LANG(?label) = "en").
 290   }
 291 }
 292 </pre></p>
 293
 294 <p>If I understand the query right, for every film entry anywhere in
 295 Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
 296 when the movie was released and its English title, if either or both
 297 of the latter two are available.  At the moment the result set contain
 298 2338 entries.  Of course, it depend on volunteers including both
 299 correct IMDB and The Internet Archive IDs in the wikipedia articles
 300 for the movie.  It should be noted that the result will include
 301 duplicates if the movie have entries in several languages.  There are
 302 some bogus entries, either because The Internet Archive ID contain a
 303 typo or because the movie is not available from The Internet Archive.
 304 I did not verify the IMDB IDs, as I am unsure how to do that
 305 automatically.</p>
 306
 307 <p>I wrote a small python script to extract the data set from Wikidata
 308 and check if the XML metadata for the movie is available from The
 309 Internet Archive, and after around 1.5 hour it produced a list of 2097
 310 free movies and their IMDB ID.  In total, 171 entries in Wikidata lack
 311 the refered Internet Archive entry.  I assume the 70 "disappearing"
 312 entries (ie 2338-2097-171) are duplicate entries.</p>
 313
 314 <p>This is not too bad, given that The Internet Archive report to
 315 contain <a href="https://archive.org/details/feature_films">5331
 316 feature films</a> at the moment, but it also mean more than 3000
 317 movies are missing on Wikipedia or are missing the pair of references
 318 on Wikipedia.</p>
 319
 320 <p>I was curious about the distribution by release year, and made a
 321 little graph to show how the amount of free movies is spread over the
 322 years:<p>
 323
 324 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
 325
 326 <p>I expect the relative distribution of the remaining 3000 movies to
 327 be similar.</p>
 328
 329 <p>If you want to help, and want to ensure Wikipedia can be used to
 330 cross reference The Internet Archive and The Internet Movie Database,
 331 please make sure entries like this are listed under the "External
 332 links" heading on the Wikipedia article for the movie:</p>
 333
 334 <p><pre>
 335 * {{Internet Archive film|id=FightingLady}}
 336 * {{IMDb title|id=0036823|title=The Fighting Lady}}
 337 </pre></p>
 338
 339 <p>Please verify the links on the final page, to make sure you did not
 340 introduce a typo.</p>
 341
 342 <p>Here is the complete list, if you want to correct the 171
 343 identified Wikipedia entries with broken links to The Internet
 344 Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
 345 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 346 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 347 <a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
 348 <a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
 349 <a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
 350 <a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
 351 <a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
 352 <a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
 353 <a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
 354 <a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
 355 <a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
 356 <a href="http://www.wikidata.org/entity/Q1479751">Q1479751</a>,
 357 <a href="http://www.wikidata.org/entity/Q1497200">Q1497200</a>,
 358 <a href="http://www.wikidata.org/entity/Q1498122">Q1498122</a>,
 359 <a href="http://www.wikidata.org/entity/Q865973">Q865973</a>,
 360 <a href="http://www.wikidata.org/entity/Q834269">Q834269</a>,
 361 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 362 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 363 <a href="http://www.wikidata.org/entity/Q1548193">Q1548193</a>,
 364 <a href="http://www.wikidata.org/entity/Q499031">Q499031</a>,
 365 <a href="http://www.wikidata.org/entity/Q1564769">Q1564769</a>,
 366 <a href="http://www.wikidata.org/entity/Q1585239">Q1585239</a>,
 367 <a href="http://www.wikidata.org/entity/Q1585569">Q1585569</a>,
 368 <a href="http://www.wikidata.org/entity/Q1624236">Q1624236</a>,
 369 <a href="http://www.wikidata.org/entity/Q4796595">Q4796595</a>,
 370 <a href="http://www.wikidata.org/entity/Q4853469">Q4853469</a>,
 371 <a href="http://www.wikidata.org/entity/Q4873046">Q4873046</a>,
 372 <a href="http://www.wikidata.org/entity/Q915016">Q915016</a>,
 373 <a href="http://www.wikidata.org/entity/Q4660396">Q4660396</a>,
 374 <a href="http://www.wikidata.org/entity/Q4677708">Q4677708</a>,
 375 <a href="http://www.wikidata.org/entity/Q4738449">Q4738449</a>,
 376 <a href="http://www.wikidata.org/entity/Q4756096">Q4756096</a>,
 377 <a href="http://www.wikidata.org/entity/Q4766785">Q4766785</a>,
 378 <a href="http://www.wikidata.org/entity/Q880357">Q880357</a>,
 379 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 380 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 381 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 382 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 383 <a href="http://www.wikidata.org/entity/Q1194170">Q1194170</a>,
 384 <a href="http://www.wikidata.org/entity/Q940014">Q940014</a>,
 385 <a href="http://www.wikidata.org/entity/Q946863">Q946863</a>,
 386 <a href="http://www.wikidata.org/entity/Q172837">Q172837</a>,
 387 <a href="http://www.wikidata.org/entity/Q573077">Q573077</a>,
 388 <a href="http://www.wikidata.org/entity/Q1219005">Q1219005</a>,
 389 <a href="http://www.wikidata.org/entity/Q1219599">Q1219599</a>,
 390 <a href="http://www.wikidata.org/entity/Q1643798">Q1643798</a>,
 391 <a href="http://www.wikidata.org/entity/Q1656352">Q1656352</a>,
 392 <a href="http://www.wikidata.org/entity/Q1659549">Q1659549</a>,
 393 <a href="http://www.wikidata.org/entity/Q1660007">Q1660007</a>,
 394 <a href="http://www.wikidata.org/entity/Q1698154">Q1698154</a>,
 395 <a href="http://www.wikidata.org/entity/Q1737980">Q1737980</a>,
 396 <a href="http://www.wikidata.org/entity/Q1877284">Q1877284</a>,
 397 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 398 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 399 <a href="http://www.wikidata.org/entity/Q1199451">Q1199451</a>,
 400 <a href="http://www.wikidata.org/entity/Q1211871">Q1211871</a>,
 401 <a href="http://www.wikidata.org/entity/Q1212179">Q1212179</a>,
 402 <a href="http://www.wikidata.org/entity/Q1238382">Q1238382</a>,
 403 <a href="http://www.wikidata.org/entity/Q4906454">Q4906454</a>,
 404 <a href="http://www.wikidata.org/entity/Q320219">Q320219</a>,
 405 <a href="http://www.wikidata.org/entity/Q1148649">Q1148649</a>,
 406 <a href="http://www.wikidata.org/entity/Q645094">Q645094</a>,
 407 <a href="http://www.wikidata.org/entity/Q5050350">Q5050350</a>,
 408 <a href="http://www.wikidata.org/entity/Q5166548">Q5166548</a>,
 409 <a href="http://www.wikidata.org/entity/Q2677926">Q2677926</a>,
 410 <a href="http://www.wikidata.org/entity/Q2698139">Q2698139</a>,
 411 <a href="http://www.wikidata.org/entity/Q2707305">Q2707305</a>,
 412 <a href="http://www.wikidata.org/entity/Q2740725">Q2740725</a>,
 413 <a href="http://www.wikidata.org/entity/Q2024780">Q2024780</a>,
 414 <a href="http://www.wikidata.org/entity/Q2117418">Q2117418</a>,
 415 <a href="http://www.wikidata.org/entity/Q2138984">Q2138984</a>,
 416 <a href="http://www.wikidata.org/entity/Q1127992">Q1127992</a>,
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 514 <a href="http://www.wikidata.org/entity/Q774474">Q774474</a></p>
 515
 516 <p>As usual, if you use Bitcoin and want to show your support of my
 517 activities, please send Bitcoin donations to my address
 518 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 519 </div>
 520       <div class="tags">
 521
 522
 523         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>.
 524
 525
 526       </div>
 527     </div>
 528     <div class="padding"></div>
 529
 530     <div class="entry">
 531       <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>
 532       <div class="date">14th October 2017</div>
 533       <div class="body"><p>I find it fascinating how many of the people being locked inside
 534 the proposed border wall between USA and Mexico support the idea.  The
 535 proposal to keep Mexicans out reminds me of
 536 <a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
 537 propaganda twist from the East Germany government</a> calling the wall
 538 the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
 539 that the wall was erected to keep enemies from creeping into East
 540 Germany, while it was obvious to the people locked inside it that it
 541 was erected to keep the people from escaping.</p>
 542
 543 <p>Do the people in USA supporting this wall really believe it is a
 544 one way wall, only keeping people on the outside from getting in,
 545 while not keeping people in the inside from getting out?</p>
 546
 547 <p>As usual, if you use Bitcoin and want to show your support of my
 548 activities, please send Bitcoin donations to my address
 549 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 550 </div>
 551       <div class="tags">
 552
 553
 554         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 555
 556
 557       </div>
 558     </div>
 559     <div class="padding"></div>
 560
 561     <div class="entry">
 562       <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>
 563       <div class="date"> 9th October 2017</div>
 564       <div class="body"><p>At my nearby maker space,
 565 <a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
 566 was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
 567 on Windows and MacOS X than Linux, because the software involved had
 568 to be manually compiled and set up on Linux while premade packages
 569 worked out of the box on Windows and MacOS X.  I found this annoying,
 570 as the software involved,
 571 <a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
 572 and should be trivial to get up and running on Linux if someone took
 573 the time to package it for the relevant distributions.  I even found
 574 <a href="https://bugs.debian.org/706656">a request for adding into
 575 Debian</a> from 2013, which had seem some activity over the years but
 576 never resulted in the software showing up in Debian.  So a few days
 577 ago I offered my help to try to improve the situation.</p>
 578
 579 <p>Now I am very happy to see that all the packages required by a
 580 working Cura in Debian are uploaded into Debian and waiting in the NEW
 581 queue for the ftpmasters to have a look.  You can track the progress
 582 on
 583 <a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
 584 status page for the 3D printer team</a>.</p>
 585
 586 <p>The uploaded packages are a bit behind upstream, and was uploaded
 587 now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
 588 queue</a> while we work up updating the packages to the latest
 589 upstream version.</p>
 590
 591 <p>On a related note, two competitors for Cura, which I found harder
 592 to use and was unable to configure correctly for Ultimaker 2+ in the
 593 short time I spent on it, are already in Debian.  If you are looking
 594 for 3D printer "slicers" and want something already available in
 595 Debian, check out
 596 <a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
 597 <a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
 598 The latter is a fork of the former.</p>
 599
 600 <p>As usual, if you use Bitcoin and want to show your support of my
 601 activities, please send Bitcoin donations to my address
 602 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 603 </div>
 604       <div class="tags">
 605
 606
 607         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>.
 608
 609
 610       </div>
 611     </div>
 612     <div class="padding"></div>
 613
 614     <div class="entry">
 615       <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>
 616       <div class="date"> 4th October 2017</div>
 617       <div class="body">Når jeg holder på med ulike prosjekter, så trenger jeg stadig ulike
 618 skruer.  Det siste prosjektet jeg holder på med er å lage
 619 <a href="https://www.thingiverse.com/thing:676916">en boks til en
 620 HDMI-touch-skjerm</a> som skal brukes med Raspberry Pi.  Boksen settes
 621 sammen med skruer og bolter, og jeg har vært i tvil om hvor jeg kan
 622 få tak i de riktige skruene.  Clas Ohlson og Jernia i nærheten har
 623 sjelden hatt det jeg trenger.  Men her om dagen fikk jeg et fantastisk
 624 tips for oss som bor i Oslo.
 625 <a href="http://www.zachskruer.no/">Zachariassen Jernvare AS</a> i
 626 <a href="http://www.openstreetmap.org/?mlat=59.93421&mlon=10.76795#map=19/59.93421/10.76795">Hegermannsgate
 627 23A på Torshov</a> har et fantastisk utvalg, og åpent mellom 09:00 og
 628 17:00.  De selger skruer, muttere, bolter, skiver etc i løs vekt, og
 629 så langt har jeg fått alt jeg har lett etter.  De har i tillegg det
 630 meste av annen jernvare, som verktøy, lamper, ledninger, etc.  Jeg
 631 håper de har nok kunder til å holde det gående lenge, da dette er en
 632 butikk jeg kommer til å besøke ofte.  Butikken er et funn å ha i
 633 nabolaget for oss som liker å bygge litt selv. :)</p>
 634
 635 <p>Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til
 636 det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner
 637 til min adresse
 638 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 639 </div>
 640       <div class="tags">
 641
 642
 643         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 644
 645
 646       </div>
 647     </div>
 648     <div class="padding"></div>
 649
 650     <div class="entry">
 651       <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>
 652       <div class="date">29th September 2017</div>
 653       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
 654 mobile cell towers.  And this radio chatter is available for anyone
 655 with a radio receiver capable of receiving them.  Details about the
 656 mobile phones with very good accuracy is of course collected by the
 657 phone companies, but this is not the topic of this blog post.  The
 658 mobile phone radio chatter make it possible to figure out when a cell
 659 phone is nearby, as it include the SIM card ID (IMSI).  By paying
 660 attention over time, one can see when a phone arrive and when it leave
 661 an area.  I believe it would be nice to make this information more
 662 available to the general public, to make more people aware of how
 663 their phones are announcing their whereabouts to anyone that care to
 664 listen.</p>
 665
 666 <p>I am very happy to report that we managed to get something
 667 visualizing this information up and running for
 668 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
 669 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
 670 library.  The solution is based on the
 671 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
 672 recipe for listening to GSM chatter</a> I posted a few days ago, and
 673 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
 674 Sone from the Computer Science department of the University of
 675 Oslo</a>.  The presentation will show the nearby mobile phones (aka
 676 IMSIs) as dots in a web browser graph, with lines to the dot
 677 representing mobile base station it is talking to. It was working in
 678 the lab yesterday, and was moved into place this morning.</p>
 679
 680 <p>We set up a fairly powerful desktop machine using Debian
 681 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
 682 connected and visualize the visible cell phone towers using an
 683 <a href="https://github.com/marlow925/hopglass">English version of
 684 Hopglass</a>.  A fairly powerfull machine is needed as the
 685 grgsm_livemon_headless processes from
 686 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
 687 the radio signal to data packages is quite CPU intensive.</p>
 688
 689 <p>The frequencies to listen to, are identified using a slightly
 690 patched scan-and-livemon (to set the --args values for each receiver),
 691 and the Hopglass data is generated using the
 692 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
 693 in my meshviewer-output branch</a>.  For some reason we could not get
 694 more than four SDRs working.  There is also a geographical map trying
 695 to show the location of the base stations, but I believe their
 696 coordinates are hardcoded to some random location in Germany, I
 697 believe.  The code should be replaced with code to look up location in
 698 a text file, a sqlite database or one of the online databases
 699 mentioned in
 700 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
 701 issue for the topic</a>.
 702
 703 <p>If this sound interesting, visit the stand at the festival!</p>
 704 </div>
 705       <div class="tags">
 706
 707
 708         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>.
 709
 710
 711       </div>
 712     </div>
 713     <div class="padding"></div>
 714
 715     <div class="entry">
 716       <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>
 717       <div class="date">24th September 2017</div>
 718       <div class="body"><p>A little more than a month ago I wrote
 719 <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">how
 720 to observe the SIM card ID (aka IMSI number) of mobile phones talking
 721 to nearby mobile phone base stations using Debian GNU/Linux and a
 722 cheap USB software defined radio</a>, and thus being able to pinpoint
 723 the location of people and equipment (like cars and trains) with an
 724 accuracy of a few kilometer.  Since then we have worked to make the
 725 procedure even simpler, and it is now possible to do this without any
 726 manual frequency tuning and without building your own packages.</p>
 727
 728 <p>The <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a>
 729 package is now included in Debian testing and unstable, and the
 730 IMSI-catcher code no longer require root access to fetch and decode
 731 the GSM data collected using gr-gsm.</p>
 732
 733 <p>Here is an updated recipe, using packages built by Debian and a git
 734 clone of two python scripts:</p>
 735
 736 <ol>
 737
 738 <li>Start with a Debian machine running the Buster version (aka
 739   testing).</li>
 740
 741 <li>Run '<tt>apt install gr-gsm python-numpy python-scipy
 742   python-scapy</tt>' as root to install required packages.</li>
 743
 744 <li>Fetch the code decoding GSM packages using '<tt>git clone
 745   github.com/Oros42/IMSI-catcher.git</tt>'.</li>
 746
 747 <li>Insert USB software defined radio supported by GNU Radio.</li>
 748
 749 <li>Enter the IMSI-catcher directory and run '<tt>python
 750   scan-and-livemon</tt>' to locate the frequency of nearby base
 751   stations and start listening for GSM packages on one of them.</li>
 752
 753 <li>Enter the IMSI-catcher directory and run '<tt>python
 754   simple_IMSI-catcher.py</tt>' to display the collected information.</li>
 755
 756 </ol>
 757
 758 <p>Note, due to a bug somewhere the scan-and-livemon program (actually
 759 <a href="https://github.com/ptrkrysik/gr-gsm/issues/336">its underlying
 760 program grgsm_scanner</a>) do not work with the HackRF radio.  It does
 761 work with RTL 8232 and other similar USB radio receivers you can get
 762 very cheaply
 763 (<a href="https://www.ebay.com/sch/items/?_nkw=rtl+2832">for example
 764 from ebay</a>), so for now the solution is to scan using the RTL radio
 765 and only use HackRF for fetching GSM data.</p>
 766
 767 <p>As far as I can tell, a cell phone only show up on one of the
 768 frequencies at the time, so if you are going to track and count every
 769 cell phone around you, you need to listen to all the frequencies used.
 770 To listen to several frequencies, use the --numrecv argument to
 771 scan-and-livemon to use several receivers.  Further, I am not sure if
 772 phones using 3G or 4G will show as talking GSM to base stations, so
 773 this approach might not see all phones around you.  I typically see
 774 0-400 IMSI numbers an hour when looking around where I live.</p>
 775
 776 <p>I've tried to run the scanner on a
 777 <a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi 2 and 3
 778 running Debian Buster</a>, but the grgsm_livemon_headless process seem
 779 to be too CPU intensive to keep up.  When GNU Radio print 'O' to
 780 stdout, I am told there it is caused by a buffer overflow between the
 781 radio and GNU Radio, caused by the program being unable to read the
 782 GSM data fast enough.  If you see a stream of 'O's from the terminal
 783 where you started scan-and-livemon, you need a give the process more
 784 CPU power.  Perhaps someone are able to optimize the code to a point
 785 where it become possible to set up RPi3 based GSM sniffers?  I tried
 786 using Raspbian instead of Debian, but there seem to be something wrong
 787 with GNU Radio on raspbian, causing glibc to abort().</p>
 788 </div>
 789       <div class="tags">
 790
 791
 792         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>.
 793
 794
 795       </div>
 796     </div>
 797     <div class="padding"></div>
 798
 799     <div class="entry">
 800       <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>
 801       <div class="date"> 7th September 2017</div>
 802       <div class="body"><p>For noen dager siden publiserte Jon Wessel-Aas en bloggpost om
 803 «<a href="http://www.uhuru.biz/?p=1821">Konklusjonen om datalagring som
 804 EU-kommisjonen ikke ville at vi skulle få se</a>».  Det er en
 805 interessant gjennomgang av EU-domstolens syn på snurpenotovervåkning
 806 av befolkningen, som er klar på at det er i strid med
 807 EU-lovgivingen.</p>
 808
 809 <p>Valgkampen går for fullt i Norge, og om noen få dager er siste
 810 frist for å avgi stemme.  En ting er sikkert, Høyre og Arbeiderpartiet
 811 får ikke min stemme
 812 <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
 813 gangen heller</a>.  Jeg har ikke glemt at de tvang igjennom loven som
 814 skulle pålegge alle data- og teletjenesteleverandører å overvåke alle
 815 sine kunder.  En lov som er vedtatt, og aldri opphevet igjen.</p>
 816
 817 <p>Det er tydelig fra diskusjonen rundt grenseløs digital overvåkning
 818 (eller "Digital Grenseforsvar" som det kalles i Orvellisk nytale) at
 819 hverken Høyre og Arbeiderpartiet har noen prinsipielle sperrer mot å
 820 overvåke hele befolkningen, og diskusjonen så langt tyder på at flere
 821 av de andre partiene heller ikke har det. Mange av
 822 <a href="https://data.holderdeord.no/votes/1301946411e">de som stemte
 823 for Datalagringsdirektivet i Stortinget</a> (64 fra Arbeiderpartiet,
 824 25 fra Høyre) er fortsatt aktive og argumenterer fortsatt for å radere
 825 vekk mer av innbyggernes privatsfære.</p>
 826
 827 <p>Når myndighetene demonstrerer sin mistillit til folket, tror jeg
 828 folket selv bør legge litt innsats i å verne sitt privatliv, ved å ta
 829 i bruk ende-til-ende-kryptert kommunikasjon med sine kjente og kjære,
 830 og begrense hvor mye privat informasjon som deles med uvedkommende.
 831 Det er jo ingenting som tyder på at myndighetene kommer til å være vår
 832 privatsfære.
 833 <a href="http://people.skolelinux.org/pere/blog/How_to_talk_with_your_loved_ones_in_private.html">Det
 834 er mange muligheter</a>.  Selv har jeg litt sans for
 835 <a href="https://ring.cx/">Ring</a>, som er basert på p2p-teknologi
 836 uten sentral kontroll, er fri programvare, og støtter meldinger, tale
 837 og video.  Systemet er tilgjengelig ut av boksen fra
 838 <a href="https://tracker.debian.org/pkg/ring">Debian</a> og
 839 <a href="https://launchpad.net/ubuntu/+source/ring">Ubuntu</a>, og det
 840 finnes pakker for Android, MacOSX og Windows.  Foreløpig er det få
 841 brukere med Ring, slik at jeg også bruker
 842 <a href="https://signal.org/">Signal</a> som nettleserutvidelse.</p>
 843 </div>
 844       <div class="tags">
 845
 846
 847         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>.
 848
 849
 850       </div>
 851     </div>
 852     <div class="padding"></div>
 853
 854     <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>
 855     <div id="sidebar">
 856
 857
 858
 859 <h2>Archive</h2>
 860 <ul>
 861
 862 <li>2017
 863 <ul>
 864
 865 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 866
 867 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 868
 869 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 870
 871 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 872
 873 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 874
 875 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 876
 877 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 878
 879 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 880
 881 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 882
 883 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (2)</a></li>
 884
 885 </ul></li>
 886
 887 <li>2016
 888 <ul>
 889
 890 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 891
 892 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 893
 894 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 895
 896 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 897
 898 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 899
 900 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 901
 902 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 903
 904 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 905
 906 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 907
 908 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 909
 910 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 911
 912 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 913
 914 </ul></li>
 915
 916 <li>2015
 917 <ul>
 918
 919 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 920
 921 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 922
 923 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 924
 925 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 926
 927 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 928
 929 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 930
 931 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 932
 933 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 934
 935 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 936
 937 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 938
 939 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 940
 941 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 942
 943 </ul></li>
 944
 945 <li>2014
 946 <ul>
 947
 948 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 949
 950 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 951
 952 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 953
 954 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 957
 958 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 961
 962 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 963
 964 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 965
 966 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 967
 968 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 969
 970 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 971
 972 </ul></li>
 973
 974 <li>2013
 975 <ul>
 976
 977 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 978
 979 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 980
 981 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 982
 983 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 984
 985 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 986
 987 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 990
 991 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 992
 993 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 994
 995 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 996
 997 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 998
 999 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
1000
1001 </ul></li>
1002
1003 <li>2012
1004 <ul>
1005
1006 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
1007
1008 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
1009
1010 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
1011
1012 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
1023
1024 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
1025
1026 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
1027
1028 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1029
1030 </ul></li>
1031
1032 <li>2011
1033 <ul>
1034
1035 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1036
1037 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1038
1039 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1040
1041 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1052
1053 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1054
1055 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1056
1057 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1058
1059 </ul></li>
1060
1061 <li>2010
1062 <ul>
1063
1064 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1065
1066 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1067
1068 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1069
1070 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1081
1082 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1083
1084 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1085
1086 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1087
1088 </ul></li>
1089
1090 <li>2009
1091 <ul>
1092
1093 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1094
1095 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1096
1097 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1098
1099 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1100
1101 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1102
1103 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1104
1105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1106
1107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1108
1109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1110
1111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1112
1113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1114
1115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1116
1117 </ul></li>
1118
1119 <li>2008
1120 <ul>
1121
1122 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1123
1124 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1125
1126 </ul></li>
1127
1128 </ul>
1129
1130
1131
1132 <h2>Tags</h2>
1133 <ul>
1134
1135  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
1136
1137  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1138
1139  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1140
1141  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1142
1143  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
1144
1145  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
1146
1147  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1148
1149  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1150
1151  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
1152
1153  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1154
1155  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1156
1157  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1158
1159  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1160
1161  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
1162
1163  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1164
1165  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (359)</a></li>
1166
1167  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1168
1169  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1170
1171  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
1172
1173  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1174
1175  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1176
1177  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1178
1179  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1180
1181  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
1182
1183  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1184
1185  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1186
1187  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1188
1189  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1190
1191  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1192
1193  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1194
1195  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1196
1197  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
1198
1199  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
1200
1201  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
1202
1203  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
1204
1205  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1206
1207  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1208
1209  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (66)</a></li>
1210
1211  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
1212
1213  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1214
1215  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1216
1217  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1218
1219  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1220
1221  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1222
1223  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1224
1225  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
1226
1227  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1228
1229  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
1230
1231  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1232
1233  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1234
1235  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1236
1237  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1238
1239  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1240
1241  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
1242
1243  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1244
1245  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1246
1247  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1248
1249  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
1250
1251  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1252
1253  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
1254
1255 </ul>
1256
1257
1258     </div>
1259     <p style="text-align: right">
1260  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1261 </p>
1262
1263   </body>
1264 </html>