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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <h3>Entries from October 2013.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html">A Raspberry Pi based batman-adv Mesh network node</a>
  27       </div>
  28       <div class="date">
  29         21st October 2013
  30       </div>
  31       <div class="body">
  32         <p>The last few days I have been experimenting with
  33 <a href="http://www.open-mesh.org/projects/batman-adv/wiki">the
  34 batman-adv mech technology</a>.  I want to gain some experience to see
  35 if it will fit <a href="https://wiki.debian.org/FreedomBox">the
  36 Freedombox project</a>, and together with my neighbors try to build a
  37 mesh network around the park where I live.  Batman-adv is a layer 2
  38 mesh system ("ethernet" in other words), where the mesh network appear
  39 as if all the mesh clients are connected to the same switch.</p>
  40
  41 <p>My hardware of choice was the Linksys WRT54GL routers I had lying
  42 around, but I've been unable to get them working with batman-adv.  So
  43 instead, I started playing with a
  44 <a href="http://www.raspberrypi.org/">Raspberry Pi</a>, and tried to
  45 get it working as a mesh node.  My idea is to use it to create a mesh
  46 node which function as a switch port, where everything connected to
  47 the Raspberry Pi ethernet plug is connected (bridged) to the mesh
  48 network.  This allow me to hook a wifi base station like the Linksys
  49 WRT54GL to the mesh by plugging it into a Raspberry Pi, and allow
  50 non-mesh clients to hook up to the mesh.  This in turn is useful for
  51 Android phones using <a href="http://servalproject.org/">the Serval
  52 Project</a> voip client, allowing every one around the playground to
  53 phone and message each other for free.  The reason is that Android
  54 phones do not see ad-hoc wifi networks (they are filtered away from
  55 the GUI view), and can not join the mesh without being rooted.  But if
  56 they are connected using a normal wifi base station, they can talk to
  57 every client on the local network.</p>
  58
  59 <p>To get this working, I've created a debian package
  60 <a href="https://github.com/petterreinholdtsen/meshfx-node">meshfx-node</a>
  61 and a script
  62 <a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/build-rpi-mesh-node">build-rpi-mesh-node</a>
  63 to create the Raspberry Pi boot image.  I'm using Debian Jessie (and
  64 not Raspbian), to get more control over the packages available.
  65 Unfortunately a huge binary blob need to be inserted into the boot
  66 image to get it booting, but I'll ignore that for now.  Also, as
  67 Debian lack support for the CPU features available in the Raspberry
  68 Pi, the system do not use the hardware floating point unit.  I hope
  69 the routing performance isn't affected by the lack of hardware FPU
  70 support.</p>
  71
  72 <p>To create an image, run the following with a sudo enabled user
  73 after inserting the target SD card into the build machine:</p>
  74
  75 <p><pre>
  76 % wget -O build-rpi-mesh-node \
  77     https://raw.github.com/petterreinholdtsen/meshfx-node/master/build-rpi-mesh-node
  78 % sudo bash -x ./build-rpi-mesh-node > build.log 2>&1
  79 % dd if=/root/rpi/rpi_basic_jessie_$(date +%Y%m%d).img of=/dev/mmcblk0 bs=1M
  80 %
  81 </pre></p>
  82
  83 <p>Booting with the resulting SD card on a Raspberry PI with a USB
  84 wifi card inserted should give you a mesh node.  At least it does for
  85 me with a the wifi card I am using. The default mesh settings are the
  86 ones used by the Oslo mesh project at Hackeriet, as I mentioned in
  87 <a href="http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">an
  88 earlier blog post about this mesh testing</a>.</p>
  89
  90 <p>The mesh node was not horribly expensive either.  I bought
  91 everything over the counter in shops nearby.  If I had ordered online
  92 from the lowest bidder, the price should be significantly lower:</p>
  93
  94 <p><table>
  95
  96 <tr><th>Supplier</th><th>Model</th><th>NOK</th></tr>
  97 <tr><td>Teknikkmagasinet</td><td>Raspberry Pi model B</td><td>349.90</td></tr>
  98 <tr><td>Teknikkmagasinet</td><td>Raspberry Pi type B case</td><td>99.90</td></tr>
  99 <tr><td>Lefdal</td><td>Jensen Air:Link 25150</td><td>295.-</td></tr>
 100 <tr><td>Clas Ohlson</td><td>Kingston 16 GB SD card</td><td>199.-</td></tr>
 101 <tr><td>Total cost</td><td></td><td>943.80</td></tr>
 102
 103 </table></p>
 104
 105 <p>Now my mesh network at home consist of one laptop in the basement
 106 connected to my production network, one Raspberry Pi node on the 1th
 107 floor that can be seen by my neighbor across the park, and one
 108 play-node I use to develop the image building script.  And some times
 109 I hook up work horse laptop to the mesh to test it.  I look forward to
 110 figuring out what kind of latency the batman-adv setup will give, and
 111 how much packet loss we will experience around the park. :)</p>
 112
 113       </div>
 114       <div class="tags">
 115
 116
 117         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox</a>, <a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.
 118
 119
 120       </div>
 121     </div>
 122     <div class="padding"></div>
 123
 124     <div class="entry">
 125       <div class="title">
 126         <a href="http://people.skolelinux.org/pere/blog/Perl_library_to_control_the_Spykee_robot_moved_to_github.html">Perl library to control the Spykee robot moved to github</a>
 127       </div>
 128       <div class="date">
 129         19th October 2013
 130       </div>
 131       <div class="body">
 132         <p>Back in 2010, I created a Perl library to talk to
 133 <a href="http://en.wikipedia.org/wiki/Spykee">the Spykee robot</a>
 134 (with two belts, wifi, USB and Linux) and made it available from my
 135 web page.  Today I concluded that it should move to a site that is
 136 easier to use to cooperate with others, and moved it to github.  If
 137 you got a Spykee robot, you might want to check out
 138 <a href="https://github.com/petterreinholdtsen/libspykee-perl">the
 139 libspykee-perl github repository</a>.</p>
 140
 141       </div>
 142       <div class="tags">
 143
 144
 145         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>, <a href="http://people.skolelinux.org/pere/blog/tags/robot">robot</a>.
 146
 147
 148       </div>
 149     </div>
 150     <div class="padding"></div>
 151
 152     <div class="entry">
 153       <div class="title">
 154         <a href="http://people.skolelinux.org/pere/blog/Good_causes__Debian_Outreach_Program_for_Women__EFF_documenting_the_spying_and_Open_access_in_Norway.html">Good causes: Debian Outreach Program for Women, EFF documenting the spying and Open access in Norway</a>
 155       </div>
 156       <div class="date">
 157         15th October 2013
 158       </div>
 159       <div class="body">
 160         <p>The last few days I came across a few good causes that should get
 161 wider attention.  I recommend signing and donating to each one of
 162 these. :)</p>
 163
 164 <p>Via <a href="http://www.debian.org/News/weekly/2013/18/">Debian
 165 Project News for 2013-10-14</a> I came across the Outreach Program for
 166 Women program which is a Google Summer of Code like initiative to get
 167 more women involved in free software.  One debian sponsor has offered
 168 to match <a href="http://debian.ch/opw2013">any donation done to Debian
 169 earmarked</a> for this initiative.  I donated a few minutes ago, and
 170 hope you will to. :)</p>
 171
 172 <p>And the Electronic Frontier Foundation just announced plans to
 173 create <a href="https://supporters.eff.org/donate/nsa-videos">video
 174 documentaries about the excessive spying</a> on every Internet user that
 175 take place these days, and their need to fund the work.  I've already
 176 donated.  Are you next?</p>
 177
 178 <p>For my Norwegian audience, the organisation Studentenes og
 179 Akademikernes Internasjonale Hjelpefond is collecting signatures for a
 180 statement under the heading
 181 <a href="http://saih.no/Bloggers_United/">Bloggers United for Open
 182 Access</a> for those of us asking for more focus on open access in the
 183 Norwegian government.  So far 499 signatures.  I hope you will sign it
 184 too.</p>
 185
 186       </div>
 187       <div class="tags">
 188
 189
 190         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/opphavsrett">opphavsrett</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 191
 192
 193       </div>
 194     </div>
 195     <div class="padding"></div>
 196
 197     <div class="entry">
 198       <div class="title">
 199         <a href="http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">Oslo community mesh network - with NUUG and Hackeriet at Hausmania</a>
 200       </div>
 201       <div class="date">
 202         11th October 2013
 203       </div>
 204       <div class="body">
 205         <p>Wireless mesh networks are self organising and self healing
 206 networks that can be used to connect computers across small and large
 207 areas, depending on the radio technology used.  Normal wifi equipment
 208 can be used to create home made radio networks, and there are several
 209 successful examples like
 210 <a href="http://www.freifunk.net/">Freifunk</a> and
 211 <a href="http://www.awmn.net/">Athens Wireless Metropolitan Network</a>
 212 (see
 213 <a href="http://en.wikipedia.org/wiki/List_of_wireless_community_networks_by_region#Greece">wikipedia
 214 for a large list</a>) around the globe.  To give you an idea how it
 215 work, check out the nice overview of the Kiel Freifunk community which
 216 can be seen from their
 217 <a href="http://freifunk.in-kiel.de/ffmap/nodes.html">dynamically
 218 updated node graph and map</a>, where one can see how the mesh nodes
 219 automatically handle routing and recover from nodes disappearing.
 220 There is also a small community mesh network group in Oslo, Norway,
 221 and that is the main topic of this blog post.</p>
 222
 223 <p>I've wanted to check out mesh networks for a while now, and hoped
 224 to do it as part of my involvement with the <a
 225 href="http://www.nuug.no/">NUUG member organisation</a> community, and
 226 my recent involvement in
 227 <a href="https://wiki.debian.org/FreedomBox">the Freedombox project</a>
 228 finally lead me to give mesh networks some priority, as I suspect a
 229 Freedombox should use mesh networks to connect neighbours and family
 230 when possible, given that most communication between people are
 231 between those nearby (as shown for example by research on Facebook
 232 communication patterns).  It also allow people to communicate without
 233 any central hub to tap into for those that want to listen in on the
 234 private communication of citizens, which have become more and more
 235 important over the years.</p>
 236
 237 <p>So far I have only been able to find one group of people in Oslo
 238 working on community mesh networks, over at the hack space
 239 <a href="http://hackeriet.no/">Hackeriet</a> at Husmania.  They seem to
 240 have started with some Freifunk based effort using OLSR, called
 241 <a href="http://oslo.freifunk.net/index.php?title=Main_Page">the Oslo
 242 Freifunk project</a>, but that effort is now dead and the people
 243 behind it have moved on to a batman-adv based system called
 244 <a href="http://meshfx.org/trac">meshfx</a>.  Unfortunately the wiki
 245 site for the Oslo Freifunk project is no longer possible to update to
 246 reflect this fact, so the old project page can't be updated to point to
 247 the new project.  A while back, the people at Hackeriet invited people
 248 from the Freifunk community to Oslo to talk about mesh networks.  I
 249 came across this video where Hans Jørgen Lysglimt interview the
 250 speakers about this talk (from
 251 <a href="https://www.youtube.com/watch?v=N2Kd7CLkhSY">youtube</a>):</p>
 252
 253 <p><iframe width="420" height="315" src="https://www.youtube.com/embed/N2Kd7CLkhSY" frameborder="0" allowfullscreen></iframe></p>
 254
 255 <p>I mentioned OLSR and batman-adv, which are mesh routing protocols.
 256 There are heaps of different protocols, and I am still struggling to
 257 figure out which one would be "best" for some definitions of best, but
 258 given that the community mesh group in Oslo is so small, I believe it
 259 is best to hook up with the existing one instead of trying to create a
 260 completely different setup, and thus I have decided to focus on
 261 batman-adv for now.  It sure help me to  know that the very cool
 262 <a href="http://www.servalproject.org/">Serval project in Australia</a>
 263 is using batman-adv as their meshing technology when it create a self
 264 organizing and self healing telephony system for disaster areas and
 265 less industrialized communities.  Check out this cool video presenting
 266 that project (from
 267 <a href="https://www.youtube.com/watch?v=30qNfzJCQOA">youtube</a>):</p>
 268
 269 <p><iframe width="560" height="315" src="https://www.youtube.com/embed/30qNfzJCQOA" frameborder="0" allowfullscreen></iframe></p>
 270
 271 <p>According to the wikipedia page on
 272 <a href="http://en.wikipedia.org/wiki/Wireless_mesh_network">Wireless
 273 mesh network</a> there are around 70 competing schemes for routing
 274 packets across mesh networks, and OLSR, B.A.T.M.A.N. and
 275 B.A.T.M.A.N. advanced are protocols used by several free software
 276 based community mesh networks.</p>
 277
 278 <p>The batman-adv protocol is a bit special, as it provide layer 2
 279 (as in ethernet ) routing, allowing ipv4 and ipv6 to work on the same
 280 network.  One way to think about it is that it provide a mesh based
 281 vlan you can bridge to or handle like any other vlan connected to your
 282 computer.  The required drivers are already in the Linux kernel at
 283 least since Debian Wheezy, and it is fairly easy to set up.  A
 284 <a href="http://www.open-mesh.org/projects/batman-adv/wiki/Quick-start-guide">good
 285 introduction</a> is available from the Open Mesh project.  These are
 286 the key settings needed to join the Oslo meshfx network:</p>
 287
 288 <p><table>
 289 <tr><th>Setting</th><th>Value</th></tr>
 290 <tr><td>Protocol / kernel module</td><td>batman-adv</td></tr>
 291 <tr><td>ESSID</td><td>meshfx@hackeriet</td></tr>
 292 <td>Channel / Frequency</td><td>11 / 2462</td></tr>
 293 <td>Cell ID</td><td>02:BA:00:00:00:01</td>
 294 </table></p>
 295
 296 <p>The reason for setting ad-hoc wifi Cell ID is to work around bugs
 297 in firmware used in wifi card and wifi drivers.  (See a nice post from
 298 VillageTelco about
 299 "<a href="http://tiebing.blogspot.no/2009/12/ad-hoc-cell-splitting-re-post-original.html">Information
 300 about cell-id splitting, stuck beacons, and failed IBSS merges!</a>
 301 for details.)  When these settings are activated and you have some
 302 other mesh node nearby, your computer will be connected to the mesh
 303 network and can communicate with any mesh node that is connected to
 304 any of the nodes in your network of nodes. :)</p>
 305
 306 <p>My initial plan was to reuse my old Linksys WRT54GL as a mesh node,
 307 but that seem to be very hard, as I have not been able to locate a
 308 firmware supporting batman-adv.  If anyone know how to use that old
 309 wifi access point with batman-adv these days, please let me know.</p>
 310
 311 <p>If you find this project interesting and want to join, please join
 312 us on IRC, either channel
 313 <a href="irc://irc.freenode.net/#oslohackerspace">#oslohackerspace</a>
 314 or <a href="irc://irc.freenode.net/#nuug">#nuug</a> on
 315 irc.freenode.net.</p>
 316
 317 <p>While investigating mesh networks in Oslo, I came across an old
 318 research paper from the university of Stavanger and Telenor Research
 319 and Innovation called
 320 <a href="http://folk.uio.no/paalee/publications/netrel-egeland-iswcs-2008.pdf">The
 321 reliability of wireless backhaul mesh networks</a> and elsewhere
 322 learned that Telenor have been experimenting with mesh networks at
 323 Grünerløkka in Oslo.  So mesh networks are also interesting for
 324 commercial companies, even though Telenor discovered that it was hard
 325 to figure out a good business plan for mesh networking and as far as I
 326 know have closed down the experiment.  Perhaps Telenor or others would
 327 be interested in a cooperation?</p>
 328
 329 <p><strong>Update 2013-10-12</strong>: I was just
 330 <a href="http://lists.alioth.debian.org/pipermail/freedombox-discuss/2013-October/005900.html">told
 331 by the Serval project developers</a> that they no longer use
 332 batman-adv (but are compatible with it), but their own crypto based
 333 mesh system.</p>
 334
 335       </div>
 336       <div class="tags">
 337
 338
 339         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox</a>, <a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.
 340
 341
 342       </div>
 343     </div>
 344     <div class="padding"></div>
 345
 346     <div class="entry">
 347       <div class="title">
 348         <a href="http://people.skolelinux.org/pere/blog/Skolelinux___Debian_Edu_7_1_install_and_overview_video_from_Marcelo_Salvador.html">Skolelinux / Debian Edu 7.1 install and overview video from Marcelo Salvador</a>
 349       </div>
 350       <div class="date">
 351          8th October 2013
 352       </div>
 353       <div class="body">
 354         <p>The other day I was pleased and surprised to discover that Marcelo
 355 Salvador had published a
 356 <a href="https://www.youtube.com/watch?v=w-GgpdqgLFc">video on
 357 Youtube</a> showing how to install the standalone Debian Edu /
 358 Skolelinux profile.  This is the profile intended for use at home or
 359 on laptops that should not be integrated into the provided network
 360 services (no central home directory, no Kerberos / LDAP directory etc,
 361 in other word a single user machine).  The result is 11 minutes long,
 362 and show some user applications (seem to be rather randomly picked).
 363 Missed a few of my favorites like celestia, planets and chromium
 364 showing the <a href="http://www.zygotebody.com/">Zygote Body 3D model
 365 of the human body</a>, but I guess he did not know about those or find
 366 other programs more interesting. :) And the video do not show the
 367 advantages I believe is one of the most valuable featuers in Debian
 368 Edu, its central school server making it possible to run hundreds of
 369 computers without hard drives by installing one central
 370 <a href="http://www.ltsp.org/">LTSP server</a>.</p>
 371
 372 <p>Anyway, check out the video, embedded below and linked to above:</p>
 373
 374 <iframe width="420" height="315" src="http://www.youtube.com/embed/w-GgpdqgLFc" frameborder="0" allowfullscreen></iframe>
 375
 376 <p>Are there other nice videos demonstrating Skolelinux?  Please let
 377 me know. :)</p>
 378
 379       </div>
 380       <div class="tags">
 381
 382
 383         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/video">video</a>.
 384
 385
 386       </div>
 387     </div>
 388     <div class="padding"></div>
 389
 390     <p style="text-align: right;"><a href="10.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 391     <div id="sidebar">
 392
 393
 394
 395 <h2>Archive</h2>
 396 <ul>
 397
 398 <li>2013
 399 <ul>
 400
 401 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 402
 403 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 404
 405 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 406
 407 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 408
 409 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 410
 411 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 412
 413 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 414
 415 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 416
 417 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 418
 419 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (5)</a></li>
 420
 421 </ul></li>
 422
 423 <li>2012
 424 <ul>
 425
 426 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 427
 428 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 429
 430 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 431
 432 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 433
 434 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 435
 436 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 437
 438 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 439
 440 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 441
 442 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 443
 444 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 445
 446 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 447
 448 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 449
 450 </ul></li>
 451
 452 <li>2011
 453 <ul>
 454
 455 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 456
 457 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 458
 459 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 460
 461 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 462
 463 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 464
 465 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 466
 467 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 468
 469 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 470
 471 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 472
 473 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 474
 475 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 476
 477 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 478
 479 </ul></li>
 480
 481 <li>2010
 482 <ul>
 483
 484 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 485
 486 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 487
 488 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 489
 490 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 491
 492 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 493
 494 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 495
 496 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 497
 498 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 499
 500 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 501
 502 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 503
 504 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 505
 506 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 507
 508 </ul></li>
 509
 510 <li>2009
 511 <ul>
 512
 513 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 514
 515 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 516
 517 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 518
 519 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 520
 521 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 522
 523 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 524
 525 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 526
 527 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 528
 529 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 530
 531 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 532
 533 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 534
 535 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 536
 537 </ul></li>
 538
 539 <li>2008
 540 <ul>
 541
 542 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 543
 544 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 545
 546 </ul></li>
 547
 548 </ul>
 549
 550
 551
 552 <h2>Tags</h2>
 553 <ul>
 554
 555  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 556
 557  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 558
 559  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 560
 561  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 562
 563  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (7)</a></li>
 564
 565  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 566
 567  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 568
 569  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (87)</a></li>
 570
 571  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (142)</a></li>
 572
 573  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 574
 575  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (10)</a></li>
 576
 577  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 578
 579  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (222)</a></li>
 580
 581  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
 582
 583  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 584
 585  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (12)</a></li>
 586
 587  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (4)</a></li>
 588
 589  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (11)</a></li>
 590
 591  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (37)</a></li>
 592
 593  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (7)</a></li>
 594
 595  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (18)</a></li>
 596
 597  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 598
 599  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (6)</a></li>
 600
 601  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 602
 603  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (2)</a></li>
 604
 605  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
 606
 607  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (235)</a></li>
 608
 609  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (156)</a></li>
 610
 611  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (8)</a></li>
 612
 613  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 614
 615  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (45)</a></li>
 616
 617  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (66)</a></li>
 618
 619  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 620
 621  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 622
 623  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 624
 625  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (8)</a></li>
 626
 627  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 628
 629  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 630
 631  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 632
 633  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (31)</a></li>
 634
 635  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 636
 637  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 638
 639  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (43)</a></li>
 640
 641  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 642
 643  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (8)</a></li>
 644
 645  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (19)</a></li>
 646
 647  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
 648
 649  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
 650
 651  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (39)</a></li>
 652
 653  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 654
 655  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (28)</a></li>
 656
 657 </ul>
 658
 659
 660     </div>
 661     <p style="text-align: right">
 662  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 663 </p>
 664
 665   </body>
 666 </html>