blog/index.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   2           "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
   6     <title>Petter Reinholdtsen</title>
   7     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/style.css" />
   8     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/vim.css" />
   9     <link rel="alternate" title="RSS Feed" href="http://people.skolelinux.org/pere/blog/index.rss" type="application/rss+xml" />
  10   </head>
  11   <body>
  12     <div class="title">
  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 Word 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 </div>
  85       <div class="tags">
  86
  87
  88         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>.
  89
  90
  91       </div>
  92     </div>
  93     <div class="padding"></div>
  94
  95     <div class="entry">
  96       <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>
  97       <div class="date"> 1st November 2017</div>
  98       <div class="body"><p>If you care about how fault tolerant your storage is, you might
  99 find these articles and papers interesting.  They have formed how I
 100 think of when designing a storage system.</p>
 101
 102 <ul>
 103
 104 <li>USENIX :login; <a
 105 href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
 106 Does Not Imply Fault Tolerance.  Analysis of Distributed Storage
 107 Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
 108 Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
 109 H. Arpaci-Dusseau</li>
 110
 111 <li>ZDNet
 112 <a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
 113 RAID 5 stops working in 2009</a> by Robin Harris</li>
 114
 115 <li>ZDNet
 116 <a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
 117 RAID 6 stops working in 2019</a> by Robin Harris</li>
 118
 119 <li>USENIX FAST'07
 120 <a href="http://research.google.com/archive/disk_failures.pdf">Failure
 121 Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
 122 Wolf-Dietrich Weber and Luiz André Barroso</li>
 123
 124 <li>USENIX ;login: <a
 125 href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
 126 Integrity.  Finding Truth in a World of Guesses and Lies</a> by Doug
 127 Hughes</li>
 128
 129 <li>USENIX FAST'08
 130 <a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
 131 Analysis of Data Corruption in the Storage Stack</a> by
 132 L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
 133 Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
 134
 135 <li>USENIX FAST'07 <a
 136 href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
 137 failures in the real world: what does an MTTF of 1,000,000 hours mean
 138 to you?</a> by B. Schroeder and G. A. Gibson.</li>
 139
 140 <li>USENIX ;login: <a
 141 href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
 142 Disks the Dominant Contributor for Storage Failures?  A Comprehensive
 143 Study of Storage Subsystem Failure Characteristics</a> by Weihang
 144 Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
 145
 146 <li>SIGMETRICS 2007
 147 <a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
 148 analysis of latent sector errors in disk drives</a> by
 149 L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
 150
 151 </ul>
 152
 153 <p>Several of these research papers are based on data collected from
 154 hundred thousands or millions of disk, and their findings are eye
 155 opening.  The short story is simply do not implicitly trust RAID or
 156 redundant storage systems.  Details matter.  And unfortunately there
 157 are few options on Linux addressing all the identified issues.  Both
 158 ZFS and Btrfs are doing a fairly good job, but have legal and
 159 practical issues on their own.  I wonder how cluster file systems like
 160 Ceph do in this regard.  After all, there is an old saying, you know
 161 you have a distributed system when the crash of a computer you have
 162 never heard of stops you from getting any work done.  The same holds
 163 true if fault tolerance do not work.</p>
 164
 165 <p>Just remember, in the end, it do not matter how redundant, or how
 166 fault tolerant your storage is, if you do not continuously monitor its
 167 status to detect and replace failed disks.</p>
 168 </div>
 169       <div class="tags">
 170
 171
 172         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>.
 173
 174
 175       </div>
 176     </div>
 177     <div class="padding"></div>
 178
 179     <div class="entry">
 180       <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>
 181       <div class="date">31st October 2017</div>
 182       <div class="body"><p>I was surprised today to learn that a friend in academia did not
 183 know there are easily available web services available for writing
 184 LaTeX documents as a team.  I thought it was common knowledge, but to
 185 make sure at least my readers are aware of it, I would like to mention
 186 these useful services for writing LaTeX documents.  Some of them even
 187 provide a WYSIWYG editor to ease writing even further.</p>
 188
 189 <p>There are two commercial services available,
 190 <a href="https://sharelatex.com">ShareLaTeX</a> and
 191 <a href="https://overleaf.com">Overleaf</a>.  They are very easy to
 192 use.  Just start a new document, select which publisher to write for
 193 (ie which LaTeX style to use), and start writing.  Note, these two
 194 have announced their intention to join forces, so soon it will only be
 195 one joint service.  I've used both for different documents, and they
 196 work just fine.  While
 197 <a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
 198 software</a>, while the latter is not.  According to <a
 199 href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
 200 announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
 201 base maintained as free software.</p>
 202
 203 But these two are not the only alternatives.
 204 <a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
 205 software solution with <a href="https://github.com/fiduswriter">the
 206 source available on github</a>.  I have not used it myself.  Several
 207 others can be found on the nice
 208 <a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
 209 web service</a>.
 210
 211 <p>If you like Google Docs or Etherpad, but would like to write
 212 documents in LaTeX, you should check out these services.  You can even
 213 host your own, if you want to. :)</p>
 214
 215 </div>
 216       <div class="tags">
 217
 218
 219         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 220
 221
 222       </div>
 223     </div>
 224     <div class="padding"></div>
 225
 226     <div class="entry">
 227       <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>
 228       <div class="date">25th October 2017</div>
 229       <div class="body"><p>Recently, I needed to automatically check the copyright status of a
 230 set of <a href="http://www.imdb.com/">The Internet Movie database
 231 (IMDB)</a> entries, to figure out which one of the movies they refer
 232 to can be freely distributed on the Internet.  This proved to be
 233 harder than it sounds.  IMDB for sure list movies without any
 234 copyright protection, where the copyright protection has expired or
 235 where the movie is lisenced using a permissive license like one from
 236 Creative Commons.  These are mixed with copyright protected movies,
 237 and there seem to be no way to separate these classes of movies using
 238 the information in IMDB.</p>
 239
 240 <p>First I tried to look up entries manually in IMDB,
 241 <a href="https://www.wikipedia.org/">Wikipedia</a> and
 242 <a href="https://www.archive.org/">The Internet Archive</a>, to get a
 243 feel how to do this.  It is hard to know for sure using these sources,
 244 but it should be possible to be reasonable confident a movie is "out
 245 of copyright" with a few hours work per movie.  As I needed to check
 246 almost 20,000 entries, this approach was not sustainable.  I simply
 247 can not work around the clock for about 6 years to check this data
 248 set.</p>
 249
 250 <p>I asked the people behind The Internet Archive if they could
 251 introduce a new metadata field in their metadata XML for IMDB ID, but
 252 was told that they leave it completely to the uploaders to update the
 253 metadata.  Some of the metadata entries had IMDB links in the
 254 description, but I found no way to download all metadata files in bulk
 255 to locate those ones and put that approach aside.</p>
 256
 257 <p>In the process I noticed several Wikipedia articles about movies
 258 had links to both IMDB and The Internet Archive, and it occured to me
 259 that I could use the Wikipedia RDF data set to locate entries with
 260 both, to at least get a lower bound on the number of movies on The
 261 Internet Archive with a IMDB ID.  This is useful based on the
 262 assumption that movies distributed by The Internet Archive can be
 263 legally distributed on the Internet.  With some help from the RDF
 264 community (thank you DanC), I was able to come up with this query to
 265 pass to <a href="https://query.wikidata.org/">the SPARQL interface on
 266 Wikidata</a>:
 267
 268 <p><pre>
 269 SELECT ?work ?imdb ?ia ?when ?label
 270 WHERE
 271 {
 272   ?work wdt:P31/wdt:P279* wd:Q11424.
 273   ?work wdt:P345 ?imdb.
 274   ?work wdt:P724 ?ia.
 275   OPTIONAL {
 276         ?work wdt:P577 ?when.
 277         ?work rdfs:label ?label.
 278         FILTER(LANG(?label) = "en").
 279   }
 280 }
 281 </pre></p>
 282
 283 <p>If I understand the query right, for every film entry anywhere in
 284 Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
 285 when the movie was released and its English title, if either or both
 286 of the latter two are available.  At the moment the result set contain
 287 2338 entries.  Of course, it depend on volunteers including both
 288 correct IMDB and The Internet Archive IDs in the wikipedia articles
 289 for the movie.  It should be noted that the result will include
 290 duplicates if the movie have entries in several languages.  There are
 291 some bogus entries, either because The Internet Archive ID contain a
 292 typo or because the movie is not available from The Internet Archive.
 293 I did not verify the IMDB IDs, as I am unsure how to do that
 294 automatically.</p>
 295
 296 <p>I wrote a small python script to extract the data set from Wikidata
 297 and check if the XML metadata for the movie is available from The
 298 Internet Archive, and after around 1.5 hour it produced a list of 2097
 299 free movies and their IMDB ID.  In total, 171 entries in Wikidata lack
 300 the refered Internet Archive entry.  I assume the 70 "disappearing"
 301 entries (ie 2338-2097-171) are duplicate entries.</p>
 302
 303 <p>This is not too bad, given that The Internet Archive report to
 304 contain <a href="https://archive.org/details/feature_films">5331
 305 feature films</a> at the moment, but it also mean more than 3000
 306 movies are missing on Wikipedia or are missing the pair of references
 307 on Wikipedia.</p>
 308
 309 <p>I was curious about the distribution by release year, and made a
 310 little graph to show how the amount of free movies is spread over the
 311 years:<p>
 312
 313 <p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
 314
 315 <p>I expect the relative distribution of the remaining 3000 movies to
 316 be similar.</p>
 317
 318 <p>If you want to help, and want to ensure Wikipedia can be used to
 319 cross reference The Internet Archive and The Internet Movie Database,
 320 please make sure entries like this are listed under the "External
 321 links" heading on the Wikipedia article for the movie:</p>
 322
 323 <p><pre>
 324 * {{Internet Archive film|id=FightingLady}}
 325 * {{IMDb title|id=0036823|title=The Fighting Lady}}
 326 </pre></p>
 327
 328 <p>Please verify the links on the final page, to make sure you did not
 329 introduce a typo.</p>
 330
 331 <p>Here is the complete list, if you want to correct the 171
 332 identified Wikipedia entries with broken links to The Internet
 333 Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
 334 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 335 <a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
 336 <a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
 337 <a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
 338 <a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
 339 <a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
 340 <a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
 341 <a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
 342 <a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
 343 <a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
 344 <a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
 345 <a href="http://www.wikidata.org/entity/Q1479751">Q1479751</a>,
 346 <a href="http://www.wikidata.org/entity/Q1497200">Q1497200</a>,
 347 <a href="http://www.wikidata.org/entity/Q1498122">Q1498122</a>,
 348 <a href="http://www.wikidata.org/entity/Q865973">Q865973</a>,
 349 <a href="http://www.wikidata.org/entity/Q834269">Q834269</a>,
 350 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 351 <a href="http://www.wikidata.org/entity/Q841781">Q841781</a>,
 352 <a href="http://www.wikidata.org/entity/Q1548193">Q1548193</a>,
 353 <a href="http://www.wikidata.org/entity/Q499031">Q499031</a>,
 354 <a href="http://www.wikidata.org/entity/Q1564769">Q1564769</a>,
 355 <a href="http://www.wikidata.org/entity/Q1585239">Q1585239</a>,
 356 <a href="http://www.wikidata.org/entity/Q1585569">Q1585569</a>,
 357 <a href="http://www.wikidata.org/entity/Q1624236">Q1624236</a>,
 358 <a href="http://www.wikidata.org/entity/Q4796595">Q4796595</a>,
 359 <a href="http://www.wikidata.org/entity/Q4853469">Q4853469</a>,
 360 <a href="http://www.wikidata.org/entity/Q4873046">Q4873046</a>,
 361 <a href="http://www.wikidata.org/entity/Q915016">Q915016</a>,
 362 <a href="http://www.wikidata.org/entity/Q4660396">Q4660396</a>,
 363 <a href="http://www.wikidata.org/entity/Q4677708">Q4677708</a>,
 364 <a href="http://www.wikidata.org/entity/Q4738449">Q4738449</a>,
 365 <a href="http://www.wikidata.org/entity/Q4756096">Q4756096</a>,
 366 <a href="http://www.wikidata.org/entity/Q4766785">Q4766785</a>,
 367 <a href="http://www.wikidata.org/entity/Q880357">Q880357</a>,
 368 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 369 <a href="http://www.wikidata.org/entity/Q882066">Q882066</a>,
 370 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 371 <a href="http://www.wikidata.org/entity/Q204191">Q204191</a>,
 372 <a href="http://www.wikidata.org/entity/Q1194170">Q1194170</a>,
 373 <a href="http://www.wikidata.org/entity/Q940014">Q940014</a>,
 374 <a href="http://www.wikidata.org/entity/Q946863">Q946863</a>,
 375 <a href="http://www.wikidata.org/entity/Q172837">Q172837</a>,
 376 <a href="http://www.wikidata.org/entity/Q573077">Q573077</a>,
 377 <a href="http://www.wikidata.org/entity/Q1219005">Q1219005</a>,
 378 <a href="http://www.wikidata.org/entity/Q1219599">Q1219599</a>,
 379 <a href="http://www.wikidata.org/entity/Q1643798">Q1643798</a>,
 380 <a href="http://www.wikidata.org/entity/Q1656352">Q1656352</a>,
 381 <a href="http://www.wikidata.org/entity/Q1659549">Q1659549</a>,
 382 <a href="http://www.wikidata.org/entity/Q1660007">Q1660007</a>,
 383 <a href="http://www.wikidata.org/entity/Q1698154">Q1698154</a>,
 384 <a href="http://www.wikidata.org/entity/Q1737980">Q1737980</a>,
 385 <a href="http://www.wikidata.org/entity/Q1877284">Q1877284</a>,
 386 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 387 <a href="http://www.wikidata.org/entity/Q1199354">Q1199354</a>,
 388 <a href="http://www.wikidata.org/entity/Q1199451">Q1199451</a>,
 389 <a href="http://www.wikidata.org/entity/Q1211871">Q1211871</a>,
 390 <a href="http://www.wikidata.org/entity/Q1212179">Q1212179</a>,
 391 <a href="http://www.wikidata.org/entity/Q1238382">Q1238382</a>,
 392 <a href="http://www.wikidata.org/entity/Q4906454">Q4906454</a>,
 393 <a href="http://www.wikidata.org/entity/Q320219">Q320219</a>,
 394 <a href="http://www.wikidata.org/entity/Q1148649">Q1148649</a>,
 395 <a href="http://www.wikidata.org/entity/Q645094">Q645094</a>,
 396 <a href="http://www.wikidata.org/entity/Q5050350">Q5050350</a>,
 397 <a href="http://www.wikidata.org/entity/Q5166548">Q5166548</a>,
 398 <a href="http://www.wikidata.org/entity/Q2677926">Q2677926</a>,
 399 <a href="http://www.wikidata.org/entity/Q2698139">Q2698139</a>,
 400 <a href="http://www.wikidata.org/entity/Q2707305">Q2707305</a>,
 401 <a href="http://www.wikidata.org/entity/Q2740725">Q2740725</a>,
 402 <a href="http://www.wikidata.org/entity/Q2024780">Q2024780</a>,
 403 <a href="http://www.wikidata.org/entity/Q2117418">Q2117418</a>,
 404 <a href="http://www.wikidata.org/entity/Q2138984">Q2138984</a>,
 405 <a href="http://www.wikidata.org/entity/Q1127992">Q1127992</a>,
 406 <a href="http://www.wikidata.org/entity/Q1058087">Q1058087</a>,
 407 <a href="http://www.wikidata.org/entity/Q1070484">Q1070484</a>,
 408 <a href="http://www.wikidata.org/entity/Q1080080">Q1080080</a>,
 409 <a href="http://www.wikidata.org/entity/Q1090813">Q1090813</a>,
 410 <a href="http://www.wikidata.org/entity/Q1251918">Q1251918</a>,
 411 <a href="http://www.wikidata.org/entity/Q1254110">Q1254110</a>,
 412 <a href="http://www.wikidata.org/entity/Q1257070">Q1257070</a>,
 413 <a href="http://www.wikidata.org/entity/Q1257079">Q1257079</a>,
 414 <a href="http://www.wikidata.org/entity/Q1197410">Q1197410</a>,
 415 <a href="http://www.wikidata.org/entity/Q1198423">Q1198423</a>,
 416 <a href="http://www.wikidata.org/entity/Q706951">Q706951</a>,
 417 <a href="http://www.wikidata.org/entity/Q723239">Q723239</a>,
 418 <a href="http://www.wikidata.org/entity/Q2079261">Q2079261</a>,
 419 <a href="http://www.wikidata.org/entity/Q1171364">Q1171364</a>,
 420 <a href="http://www.wikidata.org/entity/Q617858">Q617858</a>,
 421 <a href="http://www.wikidata.org/entity/Q5166611">Q5166611</a>,
 422 <a href="http://www.wikidata.org/entity/Q5166611">Q5166611</a>,
 423 <a href="http://www.wikidata.org/entity/Q324513">Q324513</a>,
 424 <a href="http://www.wikidata.org/entity/Q374172">Q374172</a>,
 425 <a href="http://www.wikidata.org/entity/Q7533269">Q7533269</a>,
 426 <a href="http://www.wikidata.org/entity/Q970386">Q970386</a>,
 427 <a href="http://www.wikidata.org/entity/Q976849">Q976849</a>,
 428 <a href="http://www.wikidata.org/entity/Q7458614">Q7458614</a>,
 429 <a href="http://www.wikidata.org/entity/Q5347416">Q5347416</a>,
 430 <a href="http://www.wikidata.org/entity/Q5460005">Q5460005</a>,
 431 <a href="http://www.wikidata.org/entity/Q5463392">Q5463392</a>,
 432 <a href="http://www.wikidata.org/entity/Q3038555">Q3038555</a>,
 433 <a href="http://www.wikidata.org/entity/Q5288458">Q5288458</a>,
 434 <a href="http://www.wikidata.org/entity/Q2346516">Q2346516</a>,
 435 <a href="http://www.wikidata.org/entity/Q5183645">Q5183645</a>,
 436 <a href="http://www.wikidata.org/entity/Q5185497">Q5185497</a>,
 437 <a href="http://www.wikidata.org/entity/Q5216127">Q5216127</a>,
 438 <a href="http://www.wikidata.org/entity/Q5223127">Q5223127</a>,
 439 <a href="http://www.wikidata.org/entity/Q5261159">Q5261159</a>,
 440 <a href="http://www.wikidata.org/entity/Q1300759">Q1300759</a>,
 441 <a href="http://www.wikidata.org/entity/Q5521241">Q5521241</a>,
 442 <a href="http://www.wikidata.org/entity/Q7733434">Q7733434</a>,
 443 <a href="http://www.wikidata.org/entity/Q7736264">Q7736264</a>,
 444 <a href="http://www.wikidata.org/entity/Q7737032">Q7737032</a>,
 445 <a href="http://www.wikidata.org/entity/Q7882671">Q7882671</a>,
 446 <a href="http://www.wikidata.org/entity/Q7719427">Q7719427</a>,
 447 <a href="http://www.wikidata.org/entity/Q7719444">Q7719444</a>,
 448 <a href="http://www.wikidata.org/entity/Q7722575">Q7722575</a>,
 449 <a href="http://www.wikidata.org/entity/Q2629763">Q2629763</a>,
 450 <a href="http://www.wikidata.org/entity/Q2640346">Q2640346</a>,
 451 <a href="http://www.wikidata.org/entity/Q2649671">Q2649671</a>,
 452 <a href="http://www.wikidata.org/entity/Q7703851">Q7703851</a>,
 453 <a href="http://www.wikidata.org/entity/Q7747041">Q7747041</a>,
 454 <a href="http://www.wikidata.org/entity/Q6544949">Q6544949</a>,
 455 <a href="http://www.wikidata.org/entity/Q6672759">Q6672759</a>,
 456 <a href="http://www.wikidata.org/entity/Q2445896">Q2445896</a>,
 457 <a href="http://www.wikidata.org/entity/Q12124891">Q12124891</a>,
 458 <a href="http://www.wikidata.org/entity/Q3127044">Q3127044</a>,
 459 <a href="http://www.wikidata.org/entity/Q2511262">Q2511262</a>,
 460 <a href="http://www.wikidata.org/entity/Q2517672">Q2517672</a>,
 461 <a href="http://www.wikidata.org/entity/Q2543165">Q2543165</a>,
 462 <a href="http://www.wikidata.org/entity/Q426628">Q426628</a>,
 463 <a href="http://www.wikidata.org/entity/Q426628">Q426628</a>,
 464 <a href="http://www.wikidata.org/entity/Q12126890">Q12126890</a>,
 465 <a href="http://www.wikidata.org/entity/Q13359969">Q13359969</a>,
 466 <a href="http://www.wikidata.org/entity/Q13359969">Q13359969</a>,
 467 <a href="http://www.wikidata.org/entity/Q2294295">Q2294295</a>,
 468 <a href="http://www.wikidata.org/entity/Q2294295">Q2294295</a>,
 469 <a href="http://www.wikidata.org/entity/Q2559509">Q2559509</a>,
 470 <a href="http://www.wikidata.org/entity/Q2559912">Q2559912</a>,
 471 <a href="http://www.wikidata.org/entity/Q7760469">Q7760469</a>,
 472 <a href="http://www.wikidata.org/entity/Q6703974">Q6703974</a>,
 473 <a href="http://www.wikidata.org/entity/Q4744">Q4744</a>,
 474 <a href="http://www.wikidata.org/entity/Q7766962">Q7766962</a>,
 475 <a href="http://www.wikidata.org/entity/Q7768516">Q7768516</a>,
 476 <a href="http://www.wikidata.org/entity/Q7769205">Q7769205</a>,
 477 <a href="http://www.wikidata.org/entity/Q7769988">Q7769988</a>,
 478 <a href="http://www.wikidata.org/entity/Q2946945">Q2946945</a>,
 479 <a href="http://www.wikidata.org/entity/Q3212086">Q3212086</a>,
 480 <a href="http://www.wikidata.org/entity/Q3212086">Q3212086</a>,
 481 <a href="http://www.wikidata.org/entity/Q18218448">Q18218448</a>,
 482 <a href="http://www.wikidata.org/entity/Q18218448">Q18218448</a>,
 483 <a href="http://www.wikidata.org/entity/Q18218448">Q18218448</a>,
 484 <a href="http://www.wikidata.org/entity/Q6909175">Q6909175</a>,
 485 <a href="http://www.wikidata.org/entity/Q7405709">Q7405709</a>,
 486 <a href="http://www.wikidata.org/entity/Q7416149">Q7416149</a>,
 487 <a href="http://www.wikidata.org/entity/Q7239952">Q7239952</a>,
 488 <a href="http://www.wikidata.org/entity/Q7317332">Q7317332</a>,
 489 <a href="http://www.wikidata.org/entity/Q7783674">Q7783674</a>,
 490 <a href="http://www.wikidata.org/entity/Q7783704">Q7783704</a>,
 491 <a href="http://www.wikidata.org/entity/Q7857590">Q7857590</a>,
 492 <a href="http://www.wikidata.org/entity/Q3372526">Q3372526</a>,
 493 <a href="http://www.wikidata.org/entity/Q3372642">Q3372642</a>,
 494 <a href="http://www.wikidata.org/entity/Q3372816">Q3372816</a>,
 495 <a href="http://www.wikidata.org/entity/Q3372909">Q3372909</a>,
 496 <a href="http://www.wikidata.org/entity/Q7959649">Q7959649</a>,
 497 <a href="http://www.wikidata.org/entity/Q7977485">Q7977485</a>,
 498 <a href="http://www.wikidata.org/entity/Q7992684">Q7992684</a>,
 499 <a href="http://www.wikidata.org/entity/Q3817966">Q3817966</a>,
 500 <a href="http://www.wikidata.org/entity/Q3821852">Q3821852</a>,
 501 <a href="http://www.wikidata.org/entity/Q3420907">Q3420907</a>,
 502 <a href="http://www.wikidata.org/entity/Q3429733">Q3429733</a>,
 503 <a href="http://www.wikidata.org/entity/Q774474">Q774474</a></p>
 504 </div>
 505       <div class="tags">
 506
 507
 508         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>.
 509
 510
 511       </div>
 512     </div>
 513     <div class="padding"></div>
 514
 515     <div class="entry">
 516       <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>
 517       <div class="date">14th October 2017</div>
 518       <div class="body"><p>I find it fascinating how many of the people being locked inside
 519 the proposed border wall between USA and Mexico support the idea.  The
 520 proposal to keep Mexicans out reminds me of
 521 <a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
 522 propaganda twist from the East Germany government</a> calling the wall
 523 the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
 524 that the wall was erected to keep enemies from creeping into East
 525 Germany, while it was obvious to the people locked inside it that it
 526 was erected to keep the people from escaping.</p>
 527
 528 <p>Do the people in USA supporting this wall really believe it is a
 529 one way wall, only keeping people on the outside from getting in,
 530 while not keeping people in the inside from getting out?</p>
 531 </div>
 532       <div class="tags">
 533
 534
 535         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 536
 537
 538       </div>
 539     </div>
 540     <div class="padding"></div>
 541
 542     <div class="entry">
 543       <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>
 544       <div class="date"> 9th October 2017</div>
 545       <div class="body"><p>At my nearby maker space,
 546 <a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
 547 was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
 548 on Windows and MacOS X than Linux, because the software involved had
 549 to be manually compiled and set up on Linux while premade packages
 550 worked out of the box on Windows and MacOS X.  I found this annoying,
 551 as the software involved,
 552 <a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
 553 and should be trivial to get up and running on Linux if someone took
 554 the time to package it for the relevant distributions.  I even found
 555 <a href="https://bugs.debian.org/706656">a request for adding into
 556 Debian</a> from 2013, which had seem some activity over the years but
 557 never resulted in the software showing up in Debian.  So a few days
 558 ago I offered my help to try to improve the situation.</p>
 559
 560 <p>Now I am very happy to see that all the packages required by a
 561 working Cura in Debian are uploaded into Debian and waiting in the NEW
 562 queue for the ftpmasters to have a look.  You can track the progress
 563 on
 564 <a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
 565 status page for the 3D printer team</a>.</p>
 566
 567 <p>The uploaded packages are a bit behind upstream, and was uploaded
 568 now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
 569 queue</a> while we work up updating the packages to the latest
 570 upstream version.</p>
 571
 572 <p>On a related note, two competitors for Cura, which I found harder
 573 to use and was unable to configure correctly for Ultimaker 2+ in the
 574 short time I spent on it, are already in Debian.  If you are looking
 575 for 3D printer "slicers" and want something already available in
 576 Debian, check out
 577 <a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
 578 <a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
 579 The latter is a fork of the former.</p>
 580 </div>
 581       <div class="tags">
 582
 583
 584         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>.
 585
 586
 587       </div>
 588     </div>
 589     <div class="padding"></div>
 590
 591     <div class="entry">
 592       <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>
 593       <div class="date"> 4th October 2017</div>
 594       <div class="body">Når jeg holder på med ulike prosjekter, så trenger jeg stadig ulike
 595 skruer.  Det siste prosjektet jeg holder på med er å lage
 596 <a href="https://www.thingiverse.com/thing:676916">en boks til en
 597 HDMI-touch-skjerm</a> som skal brukes med Raspberry Pi.  Boksen settes
 598 sammen med skruer og bolter, og jeg har vært i tvil om hvor jeg kan
 599 få tak i de riktige skruene.  Clas Ohlson og Jernia i nærheten har
 600 sjelden hatt det jeg trenger.  Men her om dagen fikk jeg et fantastisk
 601 tips for oss som bor i Oslo.
 602 <a href="http://www.zachskruer.no/">Zachariassen Jernvare AS</a> i
 603 <a href="http://www.openstreetmap.org/?mlat=59.93421&mlon=10.76795#map=19/59.93421/10.76795">Hegermannsgate
 604 23A på Torshov</a> har et fantastisk utvalg, og åpent mellom 09:00 og
 605 17:00.  De selger skruer, muttere, bolter, skiver etc i løs vekt, og
 606 så langt har jeg fått alt jeg har lett etter.  De har i tillegg det
 607 meste av annen jernvare, som verktøy, lamper, ledninger, etc.  Jeg
 608 håper de har nok kunder til å holde det gående lenge, da dette er en
 609 butikk jeg kommer til å besøke ofte.  Butikken er et funn å ha i
 610 nabolaget for oss som liker å bygge litt selv. :)</p>
 611 </div>
 612       <div class="tags">
 613
 614
 615         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 616
 617
 618       </div>
 619     </div>
 620     <div class="padding"></div>
 621
 622     <div class="entry">
 623       <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>
 624       <div class="date">29th September 2017</div>
 625       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
 626 mobile cell towers.  And this radio chatter is available for anyone
 627 with a radio receiver capable of receiving them.  Details about the
 628 mobile phones with very good accuracy is of course collected by the
 629 phone companies, but this is not the topic of this blog post.  The
 630 mobile phone radio chatter make it possible to figure out when a cell
 631 phone is nearby, as it include the SIM card ID (IMSI).  By paying
 632 attention over time, one can see when a phone arrive and when it leave
 633 an area.  I believe it would be nice to make this information more
 634 available to the general public, to make more people aware of how
 635 their phones are announcing their whereabouts to anyone that care to
 636 listen.</p>
 637
 638 <p>I am very happy to report that we managed to get something
 639 visualizing this information up and running for
 640 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
 641 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
 642 library.  The solution is based on the
 643 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
 644 recipe for listening to GSM chatter</a> I posted a few days ago, and
 645 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
 646 Sone from the Computer Science department of the University of
 647 Oslo</a>.  The presentation will show the nearby mobile phones (aka
 648 IMSIs) as dots in a web browser graph, with lines to the dot
 649 representing mobile base station it is talking to. It was working in
 650 the lab yesterday, and was moved into place this morning.</p>
 651
 652 <p>We set up a fairly powerful desktop machine using Debian
 653 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
 654 connected and visualize the visible cell phone towers using an
 655 <a href="https://github.com/marlow925/hopglass">English version of
 656 Hopglass</a>.  A fairly powerfull machine is needed as the
 657 grgsm_livemon_headless processes from
 658 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
 659 the radio signal to data packages is quite CPU intensive.</p>
 660
 661 <p>The frequencies to listen to, are identified using a slightly
 662 patched scan-and-livemon (to set the --args values for each receiver),
 663 and the Hopglass data is generated using the
 664 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
 665 in my meshviewer-output branch</a>.  For some reason we could not get
 666 more than four SDRs working.  There is also a geographical map trying
 667 to show the location of the base stations, but I believe their
 668 coordinates are hardcoded to some random location in Germany, I
 669 believe.  The code should be replaced with code to look up location in
 670 a text file, a sqlite database or one of the online databases
 671 mentioned in
 672 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
 673 issue for the topic</a>.
 674
 675 <p>If this sound interesting, visit the stand at the festival!</p>
 676 </div>
 677       <div class="tags">
 678
 679
 680         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>.
 681
 682
 683       </div>
 684     </div>
 685     <div class="padding"></div>
 686
 687     <div class="entry">
 688       <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>
 689       <div class="date">24th September 2017</div>
 690       <div class="body"><p>A little more than a month ago I wrote
 691 <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">how
 692 to observe the SIM card ID (aka IMSI number) of mobile phones talking
 693 to nearby mobile phone base stations using Debian GNU/Linux and a
 694 cheap USB software defined radio</a>, and thus being able to pinpoint
 695 the location of people and equipment (like cars and trains) with an
 696 accuracy of a few kilometer.  Since then we have worked to make the
 697 procedure even simpler, and it is now possible to do this without any
 698 manual frequency tuning and without building your own packages.</p>
 699
 700 <p>The <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a>
 701 package is now included in Debian testing and unstable, and the
 702 IMSI-catcher code no longer require root access to fetch and decode
 703 the GSM data collected using gr-gsm.</p>
 704
 705 <p>Here is an updated recipe, using packages built by Debian and a git
 706 clone of two python scripts:</p>
 707
 708 <ol>
 709
 710 <li>Start with a Debian machine running the Buster version (aka
 711   testing).</li>
 712
 713 <li>Run '<tt>apt install gr-gsm python-numpy python-scipy
 714   python-scapy</tt>' as root to install required packages.</li>
 715
 716 <li>Fetch the code decoding GSM packages using '<tt>git clone
 717   github.com/Oros42/IMSI-catcher.git</tt>'.</li>
 718
 719 <li>Insert USB software defined radio supported by GNU Radio.</li>
 720
 721 <li>Enter the IMSI-catcher directory and run '<tt>python
 722   scan-and-livemon</tt>' to locate the frequency of nearby base
 723   stations and start listening for GSM packages on one of them.</li>
 724
 725 <li>Enter the IMSI-catcher directory and run '<tt>python
 726   simple_IMSI-catcher.py</tt>' to display the collected information.</li>
 727
 728 </ol>
 729
 730 <p>Note, due to a bug somewhere the scan-and-livemon program (actually
 731 <a href="https://github.com/ptrkrysik/gr-gsm/issues/336">its underlying
 732 program grgsm_scanner</a>) do not work with the HackRF radio.  It does
 733 work with RTL 8232 and other similar USB radio receivers you can get
 734 very cheaply
 735 (<a href="https://www.ebay.com/sch/items/?_nkw=rtl+2832">for example
 736 from ebay</a>), so for now the solution is to scan using the RTL radio
 737 and only use HackRF for fetching GSM data.</p>
 738
 739 <p>As far as I can tell, a cell phone only show up on one of the
 740 frequencies at the time, so if you are going to track and count every
 741 cell phone around you, you need to listen to all the frequencies used.
 742 To listen to several frequencies, use the --numrecv argument to
 743 scan-and-livemon to use several receivers.  Further, I am not sure if
 744 phones using 3G or 4G will show as talking GSM to base stations, so
 745 this approach might not see all phones around you.  I typically see
 746 0-400 IMSI numbers an hour when looking around where I live.</p>
 747
 748 <p>I've tried to run the scanner on a
 749 <a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi 2 and 3
 750 running Debian Buster</a>, but the grgsm_livemon_headless process seem
 751 to be too CPU intensive to keep up.  When GNU Radio print 'O' to
 752 stdout, I am told there it is caused by a buffer overflow between the
 753 radio and GNU Radio, caused by the program being unable to read the
 754 GSM data fast enough.  If you see a stream of 'O's from the terminal
 755 where you started scan-and-livemon, you need a give the process more
 756 CPU power.  Perhaps someone are able to optimize the code to a point
 757 where it become possible to set up RPi3 based GSM sniffers?  I tried
 758 using Raspbian instead of Debian, but there seem to be something wrong
 759 with GNU Radio on raspbian, causing glibc to abort().</p>
 760 </div>
 761       <div class="tags">
 762
 763
 764         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>.
 765
 766
 767       </div>
 768     </div>
 769     <div class="padding"></div>
 770
 771     <div class="entry">
 772       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Datalagringsdirektivet_kaster_skygger_over_H_yre_og_Arbeiderpartiet.html">Datalagringsdirektivet kaster skygger over Høyre og Arbeiderpartiet</a></div>
 773       <div class="date"> 7th September 2017</div>
 774       <div class="body"><p>For noen dager siden publiserte Jon Wessel-Aas en bloggpost om
 775 «<a href="http://www.uhuru.biz/?p=1821">Konklusjonen om datalagring som
 776 EU-kommisjonen ikke ville at vi skulle få se</a>».  Det er en
 777 interessant gjennomgang av EU-domstolens syn på snurpenotovervåkning
 778 av befolkningen, som er klar på at det er i strid med
 779 EU-lovgivingen.</p>
 780
 781 <p>Valgkampen går for fullt i Norge, og om noen få dager er siste
 782 frist for å avgi stemme.  En ting er sikkert, Høyre og Arbeiderpartiet
 783 får ikke min stemme
 784 <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
 785 gangen heller</a>.  Jeg har ikke glemt at de tvang igjennom loven som
 786 skulle pålegge alle data- og teletjenesteleverandører å overvåke alle
 787 sine kunder.  En lov som er vedtatt, og aldri opphevet igjen.</p>
 788
 789 <p>Det er tydelig fra diskusjonen rundt grenseløs digital overvåkning
 790 (eller "Digital Grenseforsvar" som det kalles i Orvellisk nytale) at
 791 hverken Høyre og Arbeiderpartiet har noen prinsipielle sperrer mot å
 792 overvåke hele befolkningen, og diskusjonen så langt tyder på at flere
 793 av de andre partiene heller ikke har det. Mange av
 794 <a href="https://data.holderdeord.no/votes/1301946411e">de som stemte
 795 for Datalagringsdirektivet i Stortinget</a> (64 fra Arbeiderpartiet,
 796 25 fra Høyre) er fortsatt aktive og argumenterer fortsatt for å radere
 797 vekk mer av innbyggernes privatsfære.</p>
 798
 799 <p>Når myndighetene demonstrerer sin mistillit til folket, tror jeg
 800 folket selv bør legge litt innsats i å verne sitt privatliv, ved å ta
 801 i bruk ende-til-ende-kryptert kommunikasjon med sine kjente og kjære,
 802 og begrense hvor mye privat informasjon som deles med uvedkommende.
 803 Det er jo ingenting som tyder på at myndighetene kommer til å være vår
 804 privatsfære.
 805 <a href="http://people.skolelinux.org/pere/blog/How_to_talk_with_your_loved_ones_in_private.html">Det
 806 er mange muligheter</a>.  Selv har jeg litt sans for
 807 <a href="https://ring.cx/">Ring</a>, som er basert på p2p-teknologi
 808 uten sentral kontroll, er fri programvare, og støtter meldinger, tale
 809 og video.  Systemet er tilgjengelig ut av boksen fra
 810 <a href="https://tracker.debian.org/pkg/ring">Debian</a> og
 811 <a href="https://launchpad.net/ubuntu/+source/ring">Ubuntu</a>, og det
 812 finnes pakker for Android, MacOSX og Windows.  Foreløpig er det få
 813 brukere med Ring, slik at jeg også bruker
 814 <a href="https://signal.org/">Signal</a> som nettleserutvidelse.</p>
 815 </div>
 816       <div class="tags">
 817
 818
 819         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>.
 820
 821
 822       </div>
 823     </div>
 824     <div class="padding"></div>
 825
 826     <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>
 827     <div id="sidebar">
 828
 829
 830
 831 <h2>Archive</h2>
 832 <ul>
 833
 834 <li>2017
 835 <ul>
 836
 837 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 838
 839 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 840
 841 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 842
 843 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 844
 845 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 846
 847 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 848
 849 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 850
 851 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 852
 853 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 854
 855 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (2)</a></li>
 856
 857 </ul></li>
 858
 859 <li>2016
 860 <ul>
 861
 862 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 863
 864 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 865
 866 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 867
 868 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 869
 870 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 871
 872 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 873
 874 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 875
 876 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 877
 878 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 879
 880 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 881
 882 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 883
 884 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 885
 886 </ul></li>
 887
 888 <li>2015
 889 <ul>
 890
 891 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 892
 893 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 894
 895 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 896
 897 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 898
 899 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 900
 901 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 902
 903 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 904
 905 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 906
 907 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 908
 909 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 910
 911 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 912
 913 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 914
 915 </ul></li>
 916
 917 <li>2014
 918 <ul>
 919
 920 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 921
 922 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 923
 924 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 925
 926 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 927
 928 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 929
 930 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 931
 932 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 933
 934 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 935
 936 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 937
 938 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 939
 940 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 941
 942 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 943
 944 </ul></li>
 945
 946 <li>2013
 947 <ul>
 948
 949 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 950
 951 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 952
 953 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 954
 955 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 956
 957 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 958
 959 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 960
 961 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 962
 963 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 964
 965 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 966
 967 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 968
 969 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 970
 971 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 972
 973 </ul></li>
 974
 975 <li>2012
 976 <ul>
 977
 978 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 979
 980 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 981
 982 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 983
 984 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 985
 986 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 987
 988 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 989
 990 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 991
 992 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 993
 994 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 995
 996 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 997
 998 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 999
1000 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1001
1002 </ul></li>
1003
1004 <li>2011
1005 <ul>
1006
1007 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1008
1009 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1010
1011 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1012
1013 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1014
1015 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1016
1017 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1018
1019 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1020
1021 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1022
1023 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1024
1025 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1026
1027 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1028
1029 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1030
1031 </ul></li>
1032
1033 <li>2010
1034 <ul>
1035
1036 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1037
1038 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1039
1040 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1041
1042 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1043
1044 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1045
1046 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1047
1048 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1049
1050 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1051
1052 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1053
1054 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1055
1056 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1057
1058 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1059
1060 </ul></li>
1061
1062 <li>2009
1063 <ul>
1064
1065 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1066
1067 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1068
1069 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1070
1071 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1072
1073 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1074
1075 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1076
1077 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1078
1079 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1080
1081 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1082
1083 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1084
1085 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1086
1087 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1088
1089 </ul></li>
1090
1091 <li>2008
1092 <ul>
1093
1094 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1095
1096 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1097
1098 </ul></li>
1099
1100 </ul>
1101
1102
1103
1104 <h2>Tags</h2>
1105 <ul>
1106
1107  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
1108
1109  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1110
1111  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1112
1113  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1114
1115  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
1116
1117  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
1118
1119  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1120
1121  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1122
1123  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
1124
1125  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1126
1127  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1128
1129  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1130
1131  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1132
1133  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
1134
1135  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1136
1137  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (359)</a></li>
1138
1139  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1140
1141  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1142
1143  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
1144
1145  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1146
1147  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1148
1149  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1150
1151  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1152
1153  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
1154
1155  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1156
1157  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1158
1159  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1160
1161  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1162
1163  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1164
1165  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1166
1167  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1168
1169  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
1170
1171  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
1172
1173  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
1174
1175  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
1176
1177  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1178
1179  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1180
1181  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (66)</a></li>
1182
1183  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
1184
1185  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1186
1187  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1188
1189  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1190
1191  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1192
1193  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1194
1195  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1196
1197  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
1198
1199  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1200
1201  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
1202
1203  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1204
1205  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1206
1207  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1208
1209  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1210
1211  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1212
1213  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
1214
1215  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1216
1217  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1218
1219  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1220
1221  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
1222
1223  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1224
1225  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
1226
1227 </ul>
1228
1229
1230     </div>
1231     <p style="text-align: right">
1232  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1233 </p>
1234
1235   </body>
1236 </html>