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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/Speeding_up_the_Debian_installer_using_eatmydata_and_dpkg_divert.html">Speeding up the Debian installer using eatmydata and dpkg-divert</a></div>
  24       <div class="date">16th September 2014</div>
  25       <div class="body"><p>The <a href="https://www.debian.org/">Debian</a> installer could be
  26 a lot quicker.  When we install more than 2000 packages in
  27 <a href="http://www.skolelinux.org/">Skolelinux / Debian Edu</a> using
  28 tasksel in the installer, unpacking the binary packages take forever.
  29 A part of the slow I/O issue was discussed in
  30 <a href="https://bugs.debian.org/613428">bug #613428</a> about too
  31 much file system sync-ing done by dpkg, which is the package
  32 responsible for unpacking the binary packages.  Other parts (like code
  33 executed by postinst scripts) might also sync to disk during
  34 installation.  All this sync-ing to disk do not really make sense to
  35 me.  If the machine crash half-way through, I start over, I do not try
  36 to salvage the half installed system.  So the failure sync-ing is
  37 supposed to protect against, hardware or system crash, is not really
  38 relevant while the installer is running.</p>
  39
  40 <p>A few days ago, I thought of a way to get rid of all the file
  41 system sync()-ing in a fairly non-intrusive way, without the need to
  42 change the code in several packages.  The idea is not new, but I have
  43 not heard anyone propose the approach using dpkg-divert before.  It
  44 depend on the small and clever package
  45 <a href="https://packages.qa.debian.org/eatmydata">eatmydata</a>, which
  46 uses LD_PRELOAD to replace the system functions for syncing data to
  47 disk with functions doing nothing, thus allowing programs to live
  48 dangerous while speeding up disk I/O significantly.  Instead of
  49 modifying the implementation of dpkg, apt and tasksel (which are the
  50 packages responsible for selecting, fetching and installing packages),
  51 it occurred to me that we could just divert the programs away, replace
  52 them with a simple shell wrapper calling
  53 "eatmydata&nbsp;$program&nbsp;$@", to get the same effect.
  54 Yesterday I decided to test the idea, and wrapped up a simple
  55 implementation for the Debian Edu udeb.</p>
  56
  57 <p>The effect was stunning.  In my first test it reduced the running
  58 time of the pkgsel step (installing tasks) from 64 to less than 44
  59 minutes (20 minutes shaved off the installation) on an old Dell
  60 Latitude D505 machine.  I am not quite sure what the optimised time
  61 would have been, as I messed up the testing a bit, causing the debconf
  62 priority to get low enough for two questions to pop up during
  63 installation.  As soon as I saw the questions I moved the installation
  64 along, but do not know how long the question were holding up the
  65 installation.  I did some more measurements using Debian Edu Jessie,
  66 and got these results.  The time measured is the time stamp in
  67 /var/log/syslog between the "pkgsel: starting tasksel" and the
  68 "pkgsel: finishing up" lines, if you want to do the same measurement
  69 yourself.  In Debian Edu, the tasksel dialog do not show up, and the
  70 timing thus do not depend on how quickly the user handle the tasksel
  71 dialog.</p>
  72
  73 <p><table>
  74
  75 <tr>
  76 <th>Machine/setup</th>
  77 <th>Original tasksel</th>
  78 <th>Optimised tasksel</th>
  79 <th>Reduction</th>
  80 </tr>
  81
  82 <tr>
  83 <td>Latitude D505 Main+LTSP LXDE</td>
  84 <td>64 min (07:46-08:50)</td>
  85 <td><44 min (11:27-12:11)</td>
  86 <td>>20 min 18%</td>
  87 </tr>
  88
  89 <tr>
  90 <td>Latitude D505 Roaming LXDE</td>
  91 <td>57 min (08:48-09:45)</td>
  92 <td>34 min (07:43-08:17)</td>
  93 <td>23 min 40%</td>
  94 </tr>
  95
  96 <tr>
  97 <td>Latitude D505 Minimal</td>
  98 <td>22 min (10:37-10:59)</td>
  99 <td>11 min (11:16-11:27)</td>
 100 <td>11 min 50%</td>
 101 </tr>
 102
 103 <tr>
 104 <td>Thinkpad X200 Minimal</td>
 105 <td>6 min (08:19-08:25)</td>
 106 <td>4 min (08:04-08:08)</td>
 107 <td>2 min 33%</td>
 108 </tr>
 109
 110 <tr>
 111 <td>Thinkpad X200 Roaming KDE</td>
 112 <td>19 min (09:21-09:40)</td>
 113 <td>15 min (10:25-10:40)</td>
 114 <td>4 min 21%</td>
 115 </tr>
 116
 117 </table></p>
 118
 119 <p>The test is done using a netinst ISO on a USB stick, so some of the
 120 time is spent downloading packages.  The connection to the Internet
 121 was 100Mbit/s during testing, so downloading should not be a
 122 significant factor in the measurement.  Download typically took a few
 123 seconds to a few minutes, depending on the amount of packages being
 124 installed.</p>
 125
 126 <p>The speedup is implemented by using two hooks in
 127 <a href="https://www.debian.org/devel/debian-installer/">Debian
 128 Installer</a>, the pre-pkgsel.d hook to set up the diverts, and the
 129 finish-install.d hook to remove the divert at the end of the
 130 installation.  I picked the pre-pkgsel.d hook instead of the
 131 post-base-installer.d hook because I test using an ISO without the
 132 eatmydata package included, and the post-base-installer.d hook in
 133 Debian Edu can only operate on packages included in the ISO.  The
 134 negative effect of this is that I am unable to activate this
 135 optimization for the kernel installation step in d-i.  If the code is
 136 moved to the post-base-installer.d hook, the speedup would be larger
 137 for the entire installation.</p>
 138
 139 <p>I've implemented this in the
 140 <a href="https://packages.qa.debian.org/debian-edu-install">debian-edu-install</a>
 141 git repository, and plan to provide the optimization as part of the
 142 Debian Edu installation.  If you want to test this yourself, you can
 143 create two files in the installer (or in an udeb).  One shell script
 144 need do go into /usr/lib/pre-pkgsel.d/, with content like this:</p>
 145
 146 <p><blockquote><pre>
 147 #!/bin/sh
 148 set -e
 149 . /usr/share/debconf/confmodule
 150 info() {
 151     logger -t my-pkgsel "info: $*"
 152 }
 153 error() {
 154     logger -t my-pkgsel "error: $*"
 155 }
 156 override_install() {
 157     apt-install eatmydata || true
 158     if [ -x /target/usr/bin/eatmydata ] ; then
 159         for bin in dpkg apt-get aptitude tasksel ; do
 160             file=/usr/bin/$bin
 161             # Test that the file exist and have not been diverted already.
 162             if [ -f /target$file ] ; then
 163                 info "diverting $file using eatmydata"
 164                 printf "#!/bin/sh\neatmydata $bin.distrib \"\$@\"\n" \
 165                     > /target$file.edu
 166                 chmod 755 /target$file.edu
 167                 in-target dpkg-divert --package debian-edu-config \
 168                     --rename --quiet --add $file
 169                 ln -sf ./$bin.edu /target$file
 170             else
 171                 error "unable to divert $file, as it is missing."
 172             fi
 173         done
 174     else
 175         error "unable to find /usr/bin/eatmydata after installing the eatmydata pacage"
 176     fi
 177 }
 178
 179 override_install
 180 </pre></blockquote></p>
 181
 182 <p>To clean up, another shell script should go into
 183 /usr/lib/finish-install.d/ with code like this:
 184
 185 <p><blockquote><pre>
 186 #! /bin/sh -e
 187 . /usr/share/debconf/confmodule
 188 error() {
 189     logger -t my-finish-install "error: $@"
 190 }
 191 remove_install_override() {
 192     for bin in dpkg apt-get aptitude tasksel ; do
 193         file=/usr/bin/$bin
 194         if [ -x /target$file.edu ] ; then
 195             rm /target$file
 196             in-target dpkg-divert --package debian-edu-config \
 197                 --rename --quiet --remove $file
 198             rm /target$file.edu
 199         else
 200             error "Missing divert for $file."
 201         fi
 202     done
 203     sync # Flush file buffers before continuing
 204 }
 205
 206 remove_install_override
 207 </pre></blockquote></p>
 208
 209 <p>In Debian Edu, I placed both code fragments in a separate script
 210 edu-eatmydata-install and call it from the pre-pkgsel.d and
 211 finish-install.d scripts.</p>
 212
 213 <p>By now you might ask if this change should get into the normal
 214 Debian installer too?  I suspect it should, but am not sure the
 215 current debian-installer coordinators find it useful enough.  It also
 216 depend on the side effects of the change.  I'm not aware of any, but I
 217 guess we will see if the change is safe after some more testing.
 218 Perhaps there is some package in Debian depending on sync() and
 219 fsync() having effect?  Perhaps it should go into its own udeb, to
 220 allow those of us wanting to enable it to do so without affecting
 221 everyone.</p>
 222 </div>
 223       <div class="tags">
 224
 225
 226         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 227
 228
 229       </div>
 230     </div>
 231     <div class="padding"></div>
 232
 233     <div class="entry">
 234       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Good_bye_subkeys_pgp_net__welcome_pool_sks_keyservers_net.html">Good bye subkeys.pgp.net, welcome pool.sks-keyservers.net</a></div>
 235       <div class="date">10th September 2014</div>
 236       <div class="body"><p>Yesterday, I had the pleasure of attending a talk with the
 237 <a href="http://www.nuug.no/">Norwegian Unix User Group</a> about
 238 <a href="http://www.nuug.no/aktiviteter/20140909-sks-keyservers/">the
 239 OpenPGP keyserver pool sks-keyservers.net</a>, and was very happy to
 240 learn that there is a large set of publicly available key servers to
 241 use when looking for peoples public key.  So far I have used
 242 subkeys.pgp.net, and some times wwwkeys.nl.pgp.net when the former
 243 were misbehaving, but those days are ended.  The servers I have used
 244 up until yesterday have been slow and some times unavailable.  I hope
 245 those problems are gone now.</p>
 246
 247 <p>Behind the round robin DNS entry of the
 248 <a href="https://sks-keyservers.net/">sks-keyservers.net</a> service
 249 there is a pool of more than 100 keyservers which are checked every
 250 day to ensure they are well connected and up to date.  It must be
 251 better than what I have used so far. :)</p>
 252
 253 <p>Yesterdays speaker told me that the service is the default
 254 keyserver provided by the default configuration in GnuPG, but this do
 255 not seem to be used in Debian.  Perhaps it should?</p>
 256
 257 <p>Anyway, I've updated my ~/.gnupg/options file to now include this
 258 line:</p>
 259
 260 <p><blockquote><pre>
 261 keyserver pool.sks-keyservers.net
 262 </pre></blockquote></p>
 263
 264 <p>With GnuPG version 2 one can also locate the keyserver using SRV
 265 entries in DNS.  Just for fun, I did just that at work, so now every
 266 user of GnuPG at the University of Oslo should find a OpenGPG
 267 keyserver automatically should their need it:</p>
 268
 269 <p><blockquote><pre>
 270 % host -t srv _pgpkey-http._tcp.uio.no
 271 _pgpkey-http._tcp.uio.no has SRV record 0 100 11371 pool.sks-keyservers.net.
 272 %
 273 </pre></blockquote></p>
 274
 275 <p>Now if only
 276 <a href="http://ietfreport.isoc.org/idref/draft-shaw-openpgp-hkp/">the
 277 HKP lookup protocol</a> supported finding signature paths, I would be
 278 very happy.  It can look up a given key or search for a user ID, but I
 279 normally do not want that, but to find a trust path from my key to
 280 another key.  Given a user ID or key ID, I would like to find (and
 281 download) the keys representing a signature path from my key to the
 282 key in question, to be able to get a trust path between the two keys.
 283 This is as far as I can tell not possible today.  Perhaps something
 284 for a future version of the protocol?</p>
 285 </div>
 286       <div class="tags">
 287
 288
 289         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/sikkerhet">sikkerhet</a>.
 290
 291
 292       </div>
 293     </div>
 294     <div class="padding"></div>
 295
 296     <div class="entry">
 297       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Do_you_need_an_agreement_with_MPEG_LA_to_publish_and_broadcast_H_264_video_in_Norway_.html">Do you need an agreement with MPEG-LA to publish and broadcast H.264 video in Norway?</a></div>
 298       <div class="date">25th August 2014</div>
 299       <div class="body"><p>Two years later, I am still not sure if it is legal here in Norway
 300 to use or publish a video in H.264 or MPEG4 format edited by the
 301 commercially licensed video editors, without limiting the use to
 302 create "personal" or "non-commercial" videos or get a license
 303 agreement with <a href="http://www.mpegla.com">MPEG LA</a>.  If one
 304 want to publish and broadcast video in a non-personal or commercial
 305 setting, it might be that those tools can not be used, or that video
 306 format can not be used, without breaking their copyright license.  I
 307 am not sure.
 308 <a href="http://people.skolelinux.org/pere/blog/Trenger_en_avtale_med_MPEG_LA_for___publisere_og_kringkaste_H_264_video_.html">Back
 309 then</a>, I found that the copyright license terms for Adobe Premiere
 310 and Apple Final Cut Pro both specified that one could not use the
 311 program to produce anything else without a patent license from MPEG
 312 LA.  The issue is not limited to those two products, though.  Other
 313 much used products like those from Avid and Sorenson Media have terms
 314 of use are similar to those from Adobe and Apple.  The complicating
 315 factor making me unsure if those terms have effect in Norway or not is
 316 that the patents in question are not valid in Norway, but copyright
 317 licenses are.</p>
 318
 319 <p>These are the terms for Avid Artist Suite, according to their
 320 <a href="http://www.avid.com/US/about-avid/legal-notices/legal-enduserlicense2">published
 321 end user</a>
 322 <a href="http://www.avid.com/static/resources/common/documents/corporate/LICENSE.pdf">license
 323 text</a> (converted to lower case text for easier reading):</p>
 324
 325 <p><blockquote>
 326 <p>18.2. MPEG-4. MPEG-4 technology may be included with the
 327 software. MPEG LA, L.L.C. requires this notice: </p>
 328
 329 <p>This product is licensed under the MPEG-4 visual patent portfolio
 330 license for the personal and non-commercial use of a consumer for (i)
 331 encoding video in compliance with the MPEG-4 visual standard (“MPEG-4
 332 video”) and/or (ii) decoding MPEG-4 video that was encoded by a
 333 consumer engaged in a personal and non-commercial activity and/or was
 334 obtained from a video provider licensed by MPEG LA to provide MPEG-4
 335 video.  No license is granted or shall be implied for any other
 336 use. Additional information including that relating to promotional,
 337 internal and commercial uses and licensing may be obtained from MPEG
 338 LA, LLC.  See http://www.mpegla.com. This product is licensed under
 339 the MPEG-4 systems patent portfolio license for encoding in compliance
 340 with the MPEG-4 systems standard, except that an additional license
 341 and payment of royalties are necessary for encoding in connection with
 342 (i) data stored or replicated in physical media which is paid for on a
 343 title by title basis and/or (ii) data which is paid for on a title by
 344 title basis and is transmitted to an end user for permanent storage
 345 and/or use, such additional license may be obtained from MPEG LA,
 346 LLC. See http://www.mpegla.com for additional details.</p>
 347
 348 <p>18.3. H.264/AVC. H.264/AVC technology may be included with the
 349 software.  MPEG LA, L.L.C. requires this notice:</p>
 350
 351 <p>This product is licensed under the AVC patent portfolio license for
 352 the personal use of a consumer or other uses in which it does not
 353 receive remuneration to (i) encode video in compliance with the AVC
 354 standard (“AVC video”) and/or (ii) decode AVC video that was encoded
 355 by a consumer engaged in a personal activity and/or was obtained from
 356 a video provider licensed to provide AVC video. No license is granted
 357 or shall be implied for any other use. Additional information may be
 358 obtained from MPEG LA, L.L.C. See http://www.mpegla.com.</p>
 359 </blockquote></p>
 360
 361 <p>Note the requirement that the videos created can only be used for
 362 personal or non-commercial purposes.</p>
 363
 364 <p>The Sorenson Media software have
 365 <a href="http://www.sorensonmedia.com/terms/">similar terms</a>:</p>
 366
 367 <p><blockquote>
 368
 369 <p>With respect to a license from Sorenson pertaining to MPEG-4 Video
 370 Decoders and/or Encoders: Any such product is licensed under the
 371 MPEG-4 visual patent portfolio license for the personal and
 372 non-commercial use of a consumer for (i) encoding video in compliance
 373 with the MPEG-4 visual standard (“MPEG-4 video”) and/or (ii) decoding
 374 MPEG-4 video that was encoded by a consumer engaged in a personal and
 375 non-commercial activity and/or was obtained from a video provider
 376 licensed by MPEG LA to provide MPEG-4 video. No license is granted or
 377 shall be implied for any other use. Additional information including
 378 that relating to promotional, internal and commercial uses and
 379 licensing may be obtained from MPEG LA, LLC. See
 380 http://www.mpegla.com.</p>
 381
 382 <p>With respect to a license from Sorenson pertaining to MPEG-4
 383 Consumer Recorded Data Encoder, MPEG-4 Systems Internet Data Encoder,
 384 MPEG-4 Mobile Data Encoder, and/or MPEG-4 Unique Use Encoder: Any such
 385 product is licensed under the MPEG-4 systems patent portfolio license
 386 for encoding in compliance with the MPEG-4 systems standard, except
 387 that an additional license and payment of royalties are necessary for
 388 encoding in connection with (i) data stored or replicated in physical
 389 media which is paid for on a title by title basis and/or (ii) data
 390 which is paid for on a title by title basis and is transmitted to an
 391 end user for permanent storage and/or use. Such additional license may
 392 be obtained from MPEG LA, LLC. See http://www.mpegla.com for
 393 additional details.</p>
 394
 395 </blockquote></p>
 396
 397 <p>Some free software like
 398 <a href="https://handbrake.fr/">Handbrake</A> and
 399 <a href="http://ffmpeg.org/">FFMPEG</a> uses GPL/LGPL licenses and do
 400 not have any such terms included, so for those, there is no
 401 requirement to limit the use to personal and non-commercial.</p>
 402 </div>
 403       <div class="tags">
 404
 405
 406         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>, <a href="http://people.skolelinux.org/pere/blog/tags/web">web</a>.
 407
 408
 409       </div>
 410     </div>
 411     <div class="padding"></div>
 412
 413     <div class="entry">
 414       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Lenker_for_2014_08_03.html">Lenker for 2014-08-03</a></div>
 415       <div class="date"> 3rd August 2014</div>
 416       <div class="body"><p>Lenge siden jeg har hatt tid til å publisere lenker til skriverier
 417 jeg har hatt glede og nytte av av å lese.  Her er en liten norsk
 418 lenkesamling.</p>
 419
 420 <p><ul>
 421
 422 <li><a href="http://www.nrk.no/ytring/sjoslag-om-fiskemilliardene-1.11576109">Sjøslag
 423 om fiskemilliardene</a> (NRK Ytring 2014-03-03) - litt om hvordan de
 424 norske felles matressurser røves fra felleskapet.</li>
 425
 426 <li><a href="http://www.aftenposten.no/nyheter/Matkrisen-kan-komme-til-Norge-7522341.html">Matkrisen
 427 kan komme til Norge</a> (Aftenposten 2014-4-01) - hvordan miljøendringene vil gjøre matproduksjonen i Norge mer sårbar.</li>
 428
 429 <li><a href="http://www.nrk.no/ytring/norge-trenger-kornlager-1.11726744">Norge
 430 trenger kornlager</a> (NRK Ytring 2014-06-07) Chr. Anton Smedshaug
 431 forteller litt om Norges sårbare matsituasjon etter at Staten solgte
 432 Norges kornlager.</li>
 433
 434 <li><a href="http://www.nrk.no/norge/pst-vil-overvake-datatastaturer-1.11583286">PST
 435 vil overvåke datatastaturer</a> (NRK 2014-03-04) - PST ønsker retten
 436 til å bryte seg inn på private PC-er og legge inn spionprogrammer.
 437 Hvilket nok vil gjøre Linux mer populært, men gjør at en i enda mindre
 438 grad enn i dag kan stole på datamaskiner - neppe en god ide for
 439 samfunnet totalt sett.</li>
 440
 441 <li><a href="http://www.osloby.no/nyheter/Ruter-fremstar-som-et-pobelvelde-7490624.html">«Ruter
 442 fremstår som et pøbelvelde»</a> (OsloBy 2014-03-05) - et eksempel på
 443 hvordan kollektivtransportselskapet i Oslo håndterer sine kunder.</li>
 444
 445 <li><a href="http://www.dagbladet.no/2014/03/05/nyheter/dbtv/reklame/clear_channel/32123808/">Clear
 446 Channel nektet å vise Greenpeace-reklame i Oslo</a> (Dagbladet
 447 2014-03-05) - forteller litt om hvordan hvilke budskap som når ut i
 448 det offentlige rom kontrolleres i Norge.</li>
 449
 450 <li><a href="http://www.dagbladet.no/2014/03/06/kultur/meninger/debattinnlegg/kronikk/22_juli/32175854/">Svarte
 451 ikke på kritikken</a> (Dagbladet 2014-03-06) - innlegg fra Norsk
 452 presseforbund der de nok en gang tar opp det forkastelige i at
 453 politiet nå har full tilgang til å bedrive telefonkontroll av
 454 advokater.</li>
 455
 456 <li><a href="http://www.aftenposten.no/nyheter/uriks/Putin-spiller-poker_-ikke-sjakk-I-sjakk-har-man-regler-7495368.html">«Putin
 457 spiller poker, ikke sjakk. I sjakk har man regler.»</a> (Aftenposten
 458 2014-03-08) - sjakklegenden Kasparov forklarer litt om hvordan han ser
 459 at Russlands politikk fungerer, blant annet i lys av started av
 460 Ukraina-krisen.</li>
 461
 462 <li><a href="http://www.aftenposten.no/meninger/kronikker/I-seng-med-fienden-7492605.html">I
 463 seng med fienden</a> (Aftenposten 2014-03-10) - kronikk fra Eirik
 464 H. Vinje om hvordan menn og kvinner settes opp mot hverandre i det
 465 offentlige ordskiftet, kanskje på sviktende grunnlag.</li>
 466
 467 <li><a href="http://www.aftenposten.no/amagasinet/Hvor-er-elevene-7501690.html">Fritt
 468 frem for skulk</a> (Aftenposten 2014-03-14) - skildring av hvordan
 469 norske elever i dag ikke lenger har rimelig krav om oppmøte på
 470 skolen.</li>
 471
 472 <li><a href="http://www.aftenposten.no/digital/Datalagringsdirektiv-avslorte-abort_-sykdom-og-vapenkjop--7503014.html">«Datalagringsdirektiv»
 473 avslørte abort, sykdom og våpenkjøp</a> (Aftenposten 2014-03-14) - om
 474 hvordan forskere har dokumentert hvordan innsamling av metadata om
 475 telefoni og Internett-bruk kan være svært avslørende.</li>
 476
 477 <li><a href="http://www.dagbladet.no/2014/03/14/kultur/meninger/ideer/lordagskommentaren/agnes_ravatn/32302856/">Konsentrasjonssvikt
 478 på pensum</a> (Dagbladet 2014-03-14) - Kommentar om hvordan (feil)
 479 bruk IKT i skolen kan ødelegge mer enn det bidrar til læring.</li>
 480
 481 <li><a href="http://doremusnor.wordpress.com/2014/02/09/reservasjonsrettsstaten/">Reservasjonsrettsstaten</a>
 482 (blogg fra Doremus 2014-02-09) - morsom beskrivelse om hvordan
 483 regjeringens forslag til reservasjonsrett for leger kan utvides til å
 484 gjelde alles samvittighet.</li>
 485
 486 <li><a href="http://www.aftenposten.no/meninger/kronikker/Autoritar-gjokunge-7514915.html">Autoritær
 487 gjøkunge</a> (Aftenposten 2014-03-25) - Kronikk av Bjørn Stærk om
 488 snurpenots-overvåkningen som varsleren Snowden dokumenterte.</li>
 489
 490 <li><a href="http://blogg.friprog.no/2014/03/leveransekrise-i-offentlig-sektor-mener-mike-bracken-executive-director-of-digital-in-the-cabinet-office/">Leveransekrise
 491 i Offentlig sektor – mener Mike Bracken, Executive Director of Digital
 492 in the Cabinet Office</a> (blogg fra Friprog-senteret 2014-03-26).</li>
 493
 494 <li><a href="http://www.dagbladet.no/2014/03/26/kultur/meninger/kronikk/etiopia/avlytting/32499687/">Norge
 495 må stanse avlyttingen</a> (Dagbladet 2014-03-26) - leserinnlegg fra
 496 Felix Horne der han ber om at Norge gjør en innsats for å få slutt på
 497 overvåkning av innbyggerne som gjøres i Norge av Etiopiske
 498 myndigheter.</li>
 499
 500 <li><a href="http://www.aftenposten.no/meninger/kronikker/Demokrati-er-ingen-naturlig-styreform-7521957.html">Demokrati
 501 er ingen naturlig styreform</a> (Aftenposten 2014-04-01) - kronikk av
 502 Stein Ringen om hvordan demokrati som styreform går tapt når
 503 innbyggerne tar det for gitt.</li>
 504
 505 <li><a href="http://www.nrk.no/ytring/ytringsansvar-ere-enhver-tilladte_-1.11618934">Ytringsansvar
 506 ere Enhver tilladte!</a> (NRK Ytring 2014-04-01) - innspill fra Trygve
 507 Svensson og Helge Svare om at hver enkelt av oss har et ansvar for å
 508 ytre oss i den offentlige debatten.</li>
 509
 510 <li><a href="http://www.aftenposten.no/meninger/Jeg-er-ingen-god-samfunnsborger-7527128.html">Jeg
 511 er ingen god samfunnsborger</a> (Aftenposten 2014-04-16), kronikk av
 512 Simen Tveitereid om alternative måter å motiveres i samfunnet, uten å
 513 hige etter mer penger og flere ting.</li>
 514
 515 <li><a href="http://www.aftenposten.no/meninger/debatt/Avgjorelsen-far-umiddelbar-virkning-7531811.html">DLD-dommen:
 516 Avgjørelsen får umiddelbar virkning</a> (Aftenposten 2014-04-10) -
 517 kronikk av Høyres Michael Tetzschner, en partiutbryter i DLD-saken som
 518 stemte nei til DLD i Stortinget i 2011.</li>
 519
 520 <li><a href="http://www.uhuru.biz/?p=1466">Datalagringsdirektivets
 521 endelikt</a> (blogg fra John Wessel-Aas 2014-04-11) - oppsummering
 522 av hvordan direktivet ble funnet ugyldig i EU-domstolen.</li>
 523
 524 <li><a href="http://www.vg.no/nyheter/meninger/kronikk-kapitulasjonspresidenten/a/10147713/">Kronikk:
 525 Kapitulasjonspresidenten</a> (VG 2014-04-22) - kronikk av Einar
 526 Kr. Steffenak om hvordan Stortingspresidenten og regjeringen viser sin
 527 prinsippløshet i møte med Kina.</li>
 528
 529 <li><a href="http://www.aftenposten.no/meninger/kronikker/Innerst-inne-er-alle-nordmenn-7542617.html">Innerst
 530 inne er alle nordmenn</a> (Aftenposten 2014-04-27) - kronikk fra Bjørn
 531 Stærk om hvordan vi i Vesten i stor grad baserer oss på en fantasi om
 532 at alle i verden bærer på en drøm om å bli som oss.</li>
 533
 534 <li><a href="http://www.aftenposten.no/viten/uviten/Det-italienske-senatet-gav-seg-selv-134-milliarder-euro-i-sluttpakke--7575312.html">Det
 535 italienske senatet gav seg selv 134 milliarder euro i sluttpakke</a>
 536 (Aftenposten 2014-06-19) - forsker Simen Gaure forteller hvordan
 537 løgner og fantasi fra nettkilder i stor grad blir akseptert som
 538 sannhet - antagelig også av deg og meg.</li>
 539
 540 <li><a href="http://www.dagbladet.no/2014/05/30/kultur/meninger/kronikk/skole/33576392/">Et
 541 forsvar for bråkmakerne</a> (Dagbladet 2014-05-30) - kronikk av Dag
 542 Øystein Nome som beskriver hvordan dagens skole ikke fungerer så godt
 543 for mange elever.</li>
 544
 545 <li><a href="http://www.osloby.no/nyheter/Betalte-med-slitt-seddel---havnet-i-arresten-7617208.html">Betalte
 546 med slitt seddel - havnet i arresten</a> (Osloby 2014-06-25)) -
 547 dokumentasjon av Oslopolitiets angrep på vår alles rett til å ferdes
 548 uten elektronisk sporing.  Jeg bruker kontanter i så stor grad som
 549 mulig da banken ikke har noe med hvor jeg er og hva jeg kjøper.  Vi
 550 som gjør dette risikerer som beskrevet overgrep som frihetsberøvelse
 551 og registrering og lagring av fingeravtrykk og bilde i politiets
 552 database over mistenkte.</li>
 553
 554 <li><a href="http://www.aftenposten.no/meninger/leder/Fredsprisen-til-Snowden-7620422.html">Fredsprisen
 555 til Snowden</a> (Aftenposten 2014-06-28) - leder som forklarer hvorfor
 556 varsleren Snowden bør få fredsprisen.</li>
 557
 558 <li><a href="http://www.dagbladet.no/2014/08/01/kultur/meninger/dbmener/leder1/34598010/">Strategi
 559 for politistaten</a> (Dagbladet 2014-08-01) - leder som advarer om
 560 sterke krefter som bruker terrortrusselen til å lirke Norge nærmere å
 561 bli en politistat.</li>
 562
 563 <li><a href="http://www.nrk.no/ytring/vi-ma-tenke-nytt-om-narkotika-1.11859322">Vi
 564 må tenke nytt om narkotika</a> (NRK Ytring 2014-08-03) - Mark Lewis
 565 forklarer hvorfor legalisering og offentlig kontroll av
 566 narkotikamarkedet er mye bedre enn å overlate det til kriminelle.</li>
 567
 568
 569 </ul></p>
 570 </div>
 571       <div class="tags">
 572
 573
 574         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>.
 575
 576
 577       </div>
 578     </div>
 579     <div class="padding"></div>
 580
 581     <div class="entry">
 582       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Bernd_Zeitzen.html">Debian Edu interview: Bernd Zeitzen</a></div>
 583       <div class="date">31st July 2014</div>
 584       <div class="body"><p>The complete and free “out of the box” software solution for
 585 schools, <a href="http://www.skolelinux.org/">Debian Edu /
 586 Skolelinux</a>, is used quite a lot in Germany, and one of the people
 587 involved is Bernd Zeitzen, who show up on the project mailing lists
 588 from time to time with interesting questions and tips on how to adjust
 589 the setup.  I managed to interview him this summer.</p>
 590
 591 <p><strong>Who are you, and how do you spend your days?</strong></p>
 592
 593 <p>My name is Bernd Zeitzen and I'm married with Hedda, a self
 594 employed physiotherapist.  My former profession is tool maker, but I
 595 haven't worked for 30 years in this job.  30 years ago I started to
 596 support my wife and become her officeworker and a few years later the
 597 administrator for a small computer network, today based on Ubuntu
 598 Server (Samba, OpenVPN). For her daily work she has to use Windows
 599 Desktops because the software she needs to organize her business only
 600 works with Windows . :-(</p>
 601
 602 <p>In 1988 we started with one PC and DOS, then I learned to use
 603 Windows 98, 2000, XP, …, 8, Ubuntu, MacOSX.  Today we are running a
 604 Linux server with 6 Windows clients and 10 persons (teacher of
 605 children with special needs, speech therapist, occupational therapist,
 606 psychologist and officeworkers) using our Samba shares via OpenVPN to
 607 work with the documentations of our patients.</p>
 608
 609 <p><strong>How did you get in contact with the Skolelinux / Debian Edu
 610 project?</strong></p>
 611
 612 <p>Two years ago a friend of mine asked me, if I want to get a job in
 613 his school (<a href="http://www.gymnasium-harsewinkel.de/">Gymnasium
 614 Harsewinkel</a>).  They started with Skolelinux / Debian Edu and they
 615 were looking for people to give support to the teachers using the
 616 software and the network and teaching the pupils increasing their
 617 computer skills in optional lessons.  I'm spending 4-6 hours a week
 618 with this job.</p>
 619
 620 <p><strong>What do you see as the advantages of Skolelinux / Debian
 621 Edu?</strong></p>
 622
 623 <p>The independence.</p>
 624
 625 <p>First: Every person is allowed to use, share and develop the
 626 software. Even if you are poor, you are allowed to use the software
 627 included in Skolelinux/Debian Edu and all the other Free Software.</p>
 628
 629 <p>Second: The software runs on old machines and this gives us the
 630 possibility to recycle computers, weeded out from offices.  The
 631 servers and desktops are running for more than two years and they are
 632 working reliable. </p>
 633
 634 <p>We have two servers (one tjener and one terminal server), 45
 635 workstations in three classrooms and seven laptops as a mobile
 636 solution for all classrooms.  These machines are all booting from the
 637 terminal server.  In the moment we are installing 30 laptops as mobile
 638 workstations.  Then the pupils have the possibility to work with these
 639 machines in their classrooms.  Internet access is realized by a WLAN
 640 router, connected to the schools network. This is all done without a
 641 dedicated system administrator or a computer science teacher.</p>
 642
 643 <p><strong>What do you see as the disadvantages of Skolelinux / Debian
 644 Edu?</strong></p>
 645
 646 <p>Teachers and pupils are Windows users.  &lt;Irony on&gt; And Linux
 647 isn't cool. It's software for freaks using the command line. &lt;Irony
 648 off&gt; They don't realize the stability of the system. </p>
 649
 650 <p><strong>Which free software do you use daily?</strong></p>
 651
 652 <p>Firefox, Thunderbird, LibreOffice, Ubuntu Server 12.04 (Samba,
 653 Apache, MySQL, Joomla!, … and Skolelinux / Debian Edu)</p>
 654
 655 <p><strong>Which strategy do you believe is the right one to use to
 656 get schools to use free software?</strong></p>
 657
 658 <p>In Germany we have the situation: every school is free to decide
 659 which software they want to use. This decision is influenced by
 660 teachers who learned to use Windows and MS Office. They buy a PC with
 661 Windows preinstalled and an additional testing version of MS
 662 Office. They don't know about the possibility to use Free Software
 663 instead.  Another problem are the publisher of school books.  They
 664 develop their software, added to the school books, for Windows.</p>
 665 </div>
 666       <div class="tags">
 667
 668
 669         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju</a>.
 670
 671
 672       </div>
 673     </div>
 674     <div class="padding"></div>
 675
 676     <div class="entry">
 677       <div class="title"><a href="http://people.skolelinux.org/pere/blog/98_6_percent_done_with_the_Norwegian_draft_translation_of_Free_Culture.html">98.6 percent done with the Norwegian draft translation of Free Culture</a></div>
 678       <div class="date">23rd July 2014</div>
 679       <div class="body"><p>This summer I finally had time to continue working on the Norwegian
 680 <a href="http://www.docbook.org/">docbook</a> version of the 2004 book
 681 <a href="http://free-culture.cc/">Free Culture</a> by Lawrence Lessig,
 682 to get a Norwegian text explaining the problems with todays copyright
 683 law.  Yesterday, I finally completed translated the book text.  There
 684 are still some foot/end notes left to translate, the colophon page
 685 need to be rewritten, and a few words and phrases still need to be
 686 translated, but the Norwegian text is ready for the first proof
 687 reading. :) More spell checking is needed, and several illustrations
 688 need to be cleaned up.  The work stopped up because I had to give
 689 priority to other projects the last year, and the progress graph of
 690 the translation show this very well:</p>
 691
 692 <p><img width="80%" align="center" src="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/progress.png"></p>
 693
 694 <p>If you want to read the result, check out the
 695 <a href="https://github.com/petterreinholdtsen/free-culture-lessig">github</a>
 696 project pages and the
 697 <a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.pdf?raw=true">PDF</a>,
 698 <a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.epub?raw=true">EPUB</a>
 699 and HTML version available in the
 700 <a href="https://github.com/petterreinholdtsen/free-culture-lessig/tree/master/archive">archive
 701 directory</a>.</p>
 702
 703 <p>Please report typos, bugs and improvements to the github project if
 704 you find any.</p>
 705 </div>
 706       <div class="tags">
 707
 708
 709         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture</a>.
 710
 711
 712       </div>
 713     </div>
 714     <div class="padding"></div>
 715
 716     <div class="entry">
 717       <div class="title"><a href="http://people.skolelinux.org/pere/blog/From_English_wiki_to_translated_PDF_and_epub_via_Docbook.html">From English wiki to translated PDF and epub via Docbook</a></div>
 718       <div class="date">17th June 2014</div>
 719       <div class="body"><p>The <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux
 720 project</a> provide an instruction manual for teachers, system
 721 administrators and other users that contain useful tips for setting up
 722 and maintaining a Debian Edu installation.  This text is about how the
 723 text processing of this manual is handled in the project.</p>
 724
 725 <p>One goal of the project is to provide information in the native
 726 language of its users, and for this we need to handle translations.
 727 But we also want to make sure each language contain the same
 728 information, so for this we need a good way to keep the translations
 729 in sync.  And we want it to be easy for our users to improve the
 730 documentation, avoiding the need to learn special formats or tools to
 731 contribute, and the obvious way to do this is to make it possible to
 732 edit the documentation using a web browser.  We also want it to be
 733 easy for translators to keep the translation up to date, and give them
 734 help in figuring out what need to be translated. Here is the list of
 735 tools and the process we have found trying to reach all these
 736 goals.</p>
 737
 738 <p>We maintain the authoritative source of our manual in the
 739 <a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">Debian
 740 wiki</a>, as several wiki pages written in English.  It consist of one
 741 front page with references to the different chapters, several pages
 742 for each chapter, and finally one "collection page" gluing all the
 743 chapters together into one large web page (aka
 744 <a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/AllInOne">the
 745 AllInOne page</a>).  The AllInOne page is the one used for further
 746 processing and translations.  Thanks to the fact that the
 747 <a href="http://moinmo.in/">MoinMoin</a> installation on
 748 wiki.debian.org support exporting pages in
 749 <a href="http://www.docbook.org/">the Docbook format</a>, we can fetch
 750 the list of pages to export using the raw version of the AllInOne
 751 page, loop over each of them to generate a Docbook XML version of the
 752 manual.  This process also download images and transform image
 753 references to use the locally downloaded images.  The generated
 754 Docbook XML files are slightly broken, so some post-processing is done
 755 using the <tt>documentation/scripts/get_manual</tt> program, and the
 756 result is a nice Docbook XML file (debian-edu-wheezy-manual.xml) and
 757 a handfull of images.  The XML file can now be used to generate PDF, HTML
 758 and epub versions of the English manual.  This is the basic step of
 759 our process, making PDF (using dblatex), HTML (using xsltproc) and
 760 epub (using dbtoepub) version from Docbook XML, and the resulting files
 761 are placed in the debian-edu-doc-en binary package.</p>
 762
 763 <p>But English documentation is not enough for us.  We want translated
 764 documentation too, and we want to make it easy for translators to
 765 track the English original.  For this we use the
 766 <a href="http://packages.qa.debian.org/p/poxml.html">poxml</a> package,
 767 which allow us to transform the English Docbook XML file into a
 768 translation file (a .pot file), usable with the normal gettext based
 769 translation tools used by those translating free software.  The pot
 770 file is used to create and maintain translation files (several .po
 771 files), which the translations update with the native language
 772 translations of all titles, paragraphs and blocks of text in the
 773 original.  The next step is combining the original English Docbook XML
 774 and the translation file (say debian-edu-wheezy-manual.nb.po), to
 775 create a translated Docbook XML file (in this case
 776 debian-edu-wheezy-manual.nb.xml).  This translated (or partly
 777 translated, if the translation is not complete) Docbook XML file can
 778 then be used like the original to create a PDF, HTML and epub version
 779 of the documentation.</p>
 780
 781 <p>The translators use different tools to edit the .po files.  We
 782 recommend using
 783 <a href="http://www.kde.org/applications/development/lokalize/">lokalize</a>,
 784 while some use emacs and vi, others can use web based editors like
 785 <a href="http://pootle.translatehouse.org/">Poodle</a> or
 786 <a href="https://www.transifex.com/">Transifex</a>.  All we care about
 787 is where the .po file end up, in our git repository.  Updated
 788 translations can either be committed directly to git, or submitted as
 789 <a href="https://bugs.debian.org/src:debian-edu-doc">bug reports
 790 against the debian-edu-doc package</a>.</p>
 791
 792 <p>One challenge is images, which both might need to be translated (if
 793 they show translated user applications), and are needed in different
 794 formats when creating PDF and HTML versions (epub is a HTML version in
 795 this regard).  For this we transform the original PNG images to the
 796 needed density and format during build, and have a way to provide
 797 translated images by storing translated versions in
 798 images/$LANGUAGECODE/.  I am a bit unsure about the details here.  The
 799 package maintainers know more.</p>
 800
 801 <p>If you wonder what the result look like, we provide
 802 <a href="http://maintainer.skolelinux.org/debian-edu-doc/">the content
 803 of the documentation packages on the web</a>.  See for example the
 804 <a href="http://maintainer.skolelinux.org/debian-edu-doc/it/debian-edu-wheezy-manual.pdf">Italian
 805 PDF version</a> or the
 806 <a href="http://maintainer.skolelinux.org/debian-edu-doc/de/debian-edu-wheezy-manual.html">German
 807 HTML version</a>.  We do not yet build the epub version by default,
 808 but perhaps it will be done in the future.</p>
 809
 810 <p>To learn more, check out
 811 <a href="http://packages.qa.debian.org/d/debian-edu-doc.html">the
 812 debian-edu-doc package</a>,
 813 <a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">the
 814 manual on the wiki</a> and
 815 <a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/Translations">the
 816 translation instructions</a> in the manual.</p>
 817 </div>
 818       <div class="tags">
 819
 820
 821         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 822
 823
 824       </div>
 825     </div>
 826     <div class="padding"></div>
 827
 828     <div class="entry">
 829       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html">Hvordan enkelt laste ned filmer fra NRK med den "nye" løsningen</a></div>
 830       <div class="date">16th June 2014</div>
 831       <div class="body"><p>Jeg har fortsatt behov for å kunne laste ned innslag fra NRKs
 832 nettsted av og til for å se senere når jeg ikke er på nett, men
 833 <a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK.html">min
 834 oppskrift fra 2011</a> sluttet å fungere da NRK byttet
 835 avspillermetode.  I dag fikk jeg endelig lett etter oppdatert løsning,
 836 og jeg er veldig glad for å fortelle at den enkleste måten å laste ned
 837 innslag er å bruke siste versjon 2014.06.07 av
 838 <a href="http://rg3.github.io/youtube-dl/">youtube-dl</a>.  Støtten i
 839 youtube-dl <a href="https://github.com/rg3/youtube-dl/issues/2980">kom
 840 inn for 23 dager siden</a> og
 841 <a href="http://packages.qa.debian.org/y/youtube-dl.html">versjonen i
 842 Debian</a> fungerer fint også som backport til Debian Wheezy.  Det er
 843 et lite problem, det håndterer kun URLer med små bokstaver, men hvis
 844 en har en URL med store bokstaver kan en bare gjøre alle store om til
 845 små bokstaver for å få youtube-dl til å laste ned.  Rapporterte
 846 nettopp
 847 <a href="https://github.com/rg3/youtube-dl/issues/2980">problemet til
 848 utviklerne</a>, og antar de får fikset det snart.</p>
 849
 850 <p>Dermed er alt klart til å laste ned dokumentarene om
 851 <a href="http://tv.nrk.no/program/KOID23005014/usas-hemmelige-avlytting">USAs
 852 hemmelige avlytting</a> og
 853 <a href="http://tv.nrk.no/program/KOID23005114/selskapene-bak-usas-avlytting">Selskapene
 854 bak USAs avlytting</a>, i tillegg til
 855 <a href="http://tv.nrk.no/program/KOID20005814/et-moete-med-edward-snowden">intervjuet
 856 med Edward Snowden gjort av den tyske tv-kanalen ARD</a>.  Anbefaler
 857 alle å se disse, sammen med
 858 <a href="http://media.ccc.de/browse/congress/2013/30C3_-_5713_-_en_-_saal_2_-_201312301130_-_to_protect_and_infect_part_2_-_jacob.html">foredraget
 859 til Jacob Appelbaum på siste CCC-konferanse</a>, for å forstå mer om
 860 hvordan overvåkningen av borgerne brer om seg.</p>
 861
 862 <p>Takk til gode venner på foreningen NUUGs IRC-kanal
 863 <a href="irc://irc.freenode.net/%23nuug">#nuug på irc.freenode.net</a>
 864 for tipsene som fikk meg i mål</a>.</p>
 865
 866 <p><strong>Oppdatering 2014-06-17</strong>: Etter at jeg publiserte
 867 denne, ble jeg tipset om bloggposten
 868 "<a href="http://ingvar.blog.redpill-linpro.com/2012/05/31/downloading-hd-content-from-tv-nrk-no/">Downloading
 869 HD content from tv.nrk.no</a>" av Ingvar Hagelund, som har alternativ
 870 implementasjon og tips for å lage mkv-fil med undertekstene inkludert.
 871 Kanskje den passer bedre for deg?  I tillegg ble feilen i youtube-dl
 872 ble fikset litt senere ut på dagen i går, samt at youtube-dl fikk
 873 støtte for å laste ned undertitler.  Takk til Anders Einar Hilden for
 874 god innsats og youtube-dl-utviklerne for rask respons.</p>
 875 </div>
 876       <div class="tags">
 877
 878
 879         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>, <a href="http://people.skolelinux.org/pere/blog/tags/web">web</a>.
 880
 881
 882       </div>
 883     </div>
 884     <div class="padding"></div>
 885
 886     <div class="entry">
 887       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Free_software_car_computer_solution_.html">Free software car computer solution?</a></div>
 888       <div class="date">29th May 2014</div>
 889       <div class="body"><p>Dear lazyweb.  I'm planning to set up a small Raspberry Pi computer
 890 in my car, connected to
 891 <a href="http://www.dx.com/p/400a-4-0-tft-lcd-digital-monitor-for-vehicle-parking-reverse-camera-1440x272-12v-dc-57776">a
 892 small screen</a> next to the rear mirror.  I plan to hook it up with a
 893 GPS and a USB wifi card too.  The idea is to get my own
 894 "<a href="http://en.wikipedia.org/wiki/Carputer">Carputer</a>".  But I
 895 wonder if someone already created a good free software solution for
 896 such car computer.</p>
 897
 898 <p>This is my current wish list for such system:</p>
 899
 900 <ul>
 901
 902  <li>Work on Raspberry Pi.</li>
 903
 904  <li>Show current speed limit based on location, and warn if going too
 905    fast (for example using color codes yellow and red on the screen,
 906    or make a sound).  This could be done either using either data from
 907    <a href="http://www.openstreetmap.org/">Openstreetmap</a> or OCR
 908    info gathered from a dashboard camera.</li>
 909
 910  <li>Track automatic toll road passes and their cost, show total spent
 911    and make it possible to calculate toll costs for planned
 912    route.</li>
 913
 914  <li>Collect GPX tracks for use with OpenStreetMap.</li>
 915
 916  <li>Automatically detect and use any wireless connection to connect
 917    to home server.  Try IP over DNS
 918    (<a href="http://dev.kryo.se/iodine/">iodine</a>) or ICMP
 919    (<a href="http://code.gerade.org/hans/">Hans</a>) if direct
 920    connection do not work.</li>
 921
 922  <li>Set up mesh network to talk to other cars with the same system,
 923    or some standard car mesh protocol.</li>
 924
 925  <li>Warn when approaching speed cameras and speed camera ranges
 926    (speed calculated between two cameras).</li>
 927
 928  <li>Suport dashboard/front facing camera to discover speed limits and
 929    run OCR to track registration number of passing cars.</li>
 930
 931 </ul>
 932
 933 <p>If you know of any free software car computer system supporting
 934 some or all of these features, please let me know.</p>
 935 </div>
 936       <div class="tags">
 937
 938
 939         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 940
 941
 942       </div>
 943     </div>
 944     <div class="padding"></div>
 945
 946     <div class="entry">
 947       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Half_the_Coverity_issues_in_Gnash_fixed_in_the_next_release.html">Half the Coverity issues in Gnash fixed in the next release</a></div>
 948       <div class="date">29th April 2014</div>
 949       <div class="body"><p>I've been following <a href="http://www.getgnash.org/">the Gnash
 950 project</a> for quite a while now.  It is a free software
 951 implementation of Adobe Flash, both a standalone player and a browser
 952 plugin.  Gnash implement support for the AVM1 format (and not the
 953 newer AVM2 format - see
 954 <a href="http://lightspark.github.io/">Lightspark</a> for that one),
 955 allowing several flash based sites to work.  Thanks to the friendly
 956 developers at Youtube, it also work with Youtube videos, because the
 957 Javascript code at Youtube detect Gnash and serve a AVM1 player to
 958 those users. :) Would be great if someone found time to implement AVM2
 959 support, but it has not happened yet.  If you install both Lightspark
 960 and Gnash, Lightspark will invoke Gnash if it find a AVM1 flash file,
 961 so you can get both handled as free software.  Unfortunately,
 962 Lightspark so far only implement a small subset of AVM2, and many
 963 sites do not work yet.</p>
 964
 965 <p>A few months ago, I started looking at
 966 <a href="http://scan.coverity.com/">Coverity</a>, the static source
 967 checker used to find heaps and heaps of bugs in free software (thanks
 968 to the donation of a scanning service to free software projects by the
 969 company developing this non-free code checker), and Gnash was one of
 970 the projects I decided to check out.  Coverity is able to find lock
 971 errors, memory errors, dead code and more.  A few days ago they even
 972 extended it to also be able to find the heartbleed bug in OpenSSL.
 973 There are heaps of checks being done on the instrumented code, and the
 974 amount of bogus warnings is quite low compared to the other static
 975 code checkers I have tested over the years.</p>
 976
 977 <p>Since a few weeks ago, I've been working with the other Gnash
 978 developers squashing bugs discovered by Coverity.  I was quite happy
 979 today when I checked the current status and saw that of the 777 issues
 980 detected so far, 374 are marked as fixed.  This make me confident that
 981 the next Gnash release will be more stable and more dependable than
 982 the previous one.  Most of the reported issues were and are in the
 983 test suite, but it also found a few in the rest of the code.</p>
 984
 985 <p>If you want to help out, you find us on
 986 <a href="https://lists.gnu.org/mailman/listinfo/gnash-dev">the
 987 gnash-dev mailing list</a> and on
 988 <a href="irc://irc.freenode.net/#gnash">the #gnash channel on
 989 irc.freenode.net IRC server</a>.</p>
 990 </div>
 991       <div class="tags">
 992
 993
 994         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>, <a href="http://people.skolelinux.org/pere/blog/tags/web">web</a>.
 995
 996
 997       </div>
 998     </div>
 999     <div class="padding"></div>
1000
1001     <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>
1002     <div id="sidebar">
1003
1004
1005
1006 <h2>Archive</h2>
1007 <ul>
1008
1009 <li>2014
1010 <ul>
1011
1012 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
1023
1024 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
1025
1026 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
1027
1028 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (2)</a></li>
1029
1030 </ul></li>
1031
1032 <li>2013
1033 <ul>
1034
1035 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
1036
1037 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
1038
1039 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
1040
1041 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
1052
1053 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
1054
1055 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
1056
1057 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
1058
1059 </ul></li>
1060
1061 <li>2012
1062 <ul>
1063
1064 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
1065
1066 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
1067
1068 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
1069
1070 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
1081
1082 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
1083
1084 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
1085
1086 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1087
1088 </ul></li>
1089
1090 <li>2011
1091 <ul>
1092
1093 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1094
1095 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1096
1097 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1098
1099 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1100
1101 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1102
1103 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1104
1105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1106
1107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1108
1109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1110
1111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1112
1113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1114
1115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1116
1117 </ul></li>
1118
1119 <li>2010
1120 <ul>
1121
1122 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1123
1124 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1125
1126 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1127
1128 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1129
1130 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1131
1132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1133
1134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1135
1136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1137
1138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1139
1140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1141
1142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1143
1144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1145
1146 </ul></li>
1147
1148 <li>2009
1149 <ul>
1150
1151 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1152
1153 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1154
1155 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1156
1157 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1158
1159 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1160
1161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1162
1163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1164
1165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1166
1167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1168
1169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1170
1171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1172
1173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1174
1175 </ul></li>
1176
1177 <li>2008
1178 <ul>
1179
1180 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1181
1182 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1183
1184 </ul></li>
1185
1186 </ul>
1187
1188
1189
1190 <h2>Tags</h2>
1191 <ul>
1192
1193  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
1194
1195  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1196
1197  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1198
1199  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1200
1201  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (8)</a></li>
1202
1203  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (14)</a></li>
1204
1205  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1206
1207  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1208
1209  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (101)</a></li>
1210
1211  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (149)</a></li>
1212
1213  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1214
1215  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (15)</a></li>
1216
1217  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (12)</a></li>
1218
1219  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1220
1221  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (253)</a></li>
1222
1223  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
1224
1225  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1226
1227  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (13)</a></li>
1228
1229  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (8)</a></li>
1230
1231  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (11)</a></li>
1232
1233  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (41)</a></li>
1234
1235  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (9)</a></li>
1236
1237  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (18)</a></li>
1238
1239  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1240
1241  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1242
1243  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1244
1245  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1246
1247  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (29)</a></li>
1248
1249  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (247)</a></li>
1250
1251  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (162)</a></li>
1252
1253  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (11)</a></li>
1254
1255  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1256
1257  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (48)</a></li>
1258
1259  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (74)</a></li>
1260
1261  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
1262
1263  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1264
1265  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1266
1267  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
1268
1269  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (9)</a></li>
1270
1271  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1272
1273  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
1274
1275  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1276
1277  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (41)</a></li>
1278
1279  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1280
1281  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
1282
1283  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (45)</a></li>
1284
1285  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
1286
1287  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (9)</a></li>
1288
1289  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (25)</a></li>
1290
1291  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
1292
1293  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
1294
1295  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (43)</a></li>
1296
1297  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1298
1299  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (33)</a></li>
1300
1301 </ul>
1302
1303
1304     </div>
1305     <p style="text-align: right">
1306  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1307 </p>
1308
1309   </body>
1310 </html>