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6 <title>Petter Reinholdtsen
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14 <a href=
"http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen
</a>
23 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Klaus_Knopper.html">Debian Edu interview: Klaus Knopper
</a></div>
24 <div class=
"date"> 6th December
2013</div>
25 <div class=
"body"><p>It has been a while since I managed to publish the last interview,
26 but the
<a href=
"http://www.skolelinux.org/">Debian Edu /
27 Skolelinux
</a> community is still going strong, and yesterday we even
28 had a new school administrator show up on
29 <a href=
"irc://irc.debian.org/#debian-edu">#debian-edu
</a> to share
30 his success story with installing Debian Edu at their school. This
31 time I have been able to get some helpful comments from the creator of
32 Knoppix, Klaus Knopper, who was involved in a Skolelinux project in
33 Germany a few years ago.
</p>
35 <p><strong>Who are you, and how do you spend your days?
</strong></p>
37 <p>I am Klaus Knopper. I have a master degree in electrical
38 engineering, and is currently professor in information management at
39 the university of applied sciences Kaiserslautern / Germany and
40 freelance Open Source software developer and consultant.
</p>
42 <p>All of this is pretty much of the work I spend my days with. Apart
43 from teaching, I'm also conducting some more or less experimental
44 projects like the
<a href=
"http://www.knoppix.org">Knoppix GNU/Linux live
45 system
</a> (Debian-based like Skolelinux),
46 <a href=
"http://www.knopper.net/knoppix-adriane/index-en.html">ADRIANE
</a>
47 (a blind-friendly talking desktop system) and
48 <a href=
"http://www.knopper.net/linbo/index-en.html">LINBO
</a>
49 (Linux-based network boot console, a fast remote install and repair
50 system supporting various operating systems).
</p>
52 <p><strong>How did you get in contact with the Skolelinux / Debian Edu
55 <p>The credit for this have to go to Kurt Gramlich, who is the German
56 coordinator for Skolelinux. We were looking for an all-in-one open
57 source community-supported distribution for schools, and Kurt
58 introduced us to Skolelinux for this purpose.
</p>
60 <p><strong>What do you see as the advantages of Skolelinux / Debian
64 <li>Quick installation,
</li>
65 <li>works (almost) out of the box,
</li>
66 <li>contains many useful software packages for teaching and learning,
</li>
67 <li>is a purely community-based distro and not controlled by a
69 <li>has a large number of supporters and teachers who share their
70 experience and problem solutions.
</li>
73 <p><strong>What do you see as the disadvantages of Skolelinux / Debian
77 <li>Skolelinux is - as we had to learn - not easily upgradable to
78 the next version. Opposed to its genuine Debian base, upgrading to
79 a new version means a full new installation from scratch to get it
80 working again reliably.
82 <li>Skolelinux is based on Debian/stable, and therefore always a
83 little outdated in terms of program versions compared to Edubuntu or
84 similar educational Linux distros, which rather use Debian/testing
87 <li>Skolelinux has some very self-opinionated and stubborn default
88 configuration which in my opinion adds unnecessary complexity and is
89 not always suitable for a schools needs, the preset network
90 configuration is actually a core definition feature of Skolelinux
91 and not easy to change, so schools sometimes have to change their
92 network configuration to make it "Skolelinux-compatible".
94 <li>Some proposed extensions, which were made available as
95 contribution, like secure examination mode and lecture material
96 distribution and collection, were not accepted into the mainline
97 Skolelinux development and are now not easy to maintain in the
98 future because of Skolelinux somewhat undeterministic update
101 <li>Skolelinux has only a very tiny number of base developers
102 compared to Debian.
</li>
106 <p>For these reasons and experience from our project, I would now
107 rather consider using plain Debian for schools next time, until
108 Skolelinux is more closely integrated into Debian and becomes
109 upgradeable without reinstallation.
</p>
111 <p><strong>Which free software do you use daily?
</strong></p>
113 <p>GNU/Linux with LXDE desktop, bash for interactive dialog and
114 programming, texlive for documentation and correspondence,
115 occasionally LibreOffice for document format conversion. Various
116 programming languages for teaching.
</p>
118 <p><strong>Which strategy do you believe is the right one to use to
119 get schools to use free software?
</strong></p>
121 <p>Strong arguments are
125 <li>Knowledge is free, and so should be methods and tools for
126 teaching and learning.
</li>
128 <li>Students can learn with and use the same software at school, at
129 home, and at their working place without running into license or
130 conversion problems.
</li>
132 <li>Closed source or proprietary software hides knowledge rather
133 than exposing it, and proprietary software vendors try to bind
134 customers to certain products. But teachers need to teach
135 science, not products.
</li>
137 <li>If you have everything you for daily work as open source, what
138 would you need proprietary software for?
</li>
145 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>.
150 <div class=
"padding"></div>
153 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/Dugnadsnett_for_alle__a_wireless_community_network_in_Oslo__take_shape.html">Dugnadsnett for alle, a wireless community network in Oslo, take shape
</a></div>
154 <div class=
"date">30th November
2013</div>
155 <div class=
"body"><p>If you want the ability to electronically communicate directly with
156 your neighbors and friends using a network controlled by your peers in
157 stead of centrally controlled by a few corporations, or would like to
158 experiment with interesting network technology, the
159 <a href=
"http://www.dugnadsnett.no/">Dugnasnett for alle i Oslo
</a>
160 might be project for you.
39 mesh nodes are currently being planned,
161 in the freshly started initiative from NUUG and Hackeriet to create a
162 wireless community network. The work is inspired by
163 <a href=
"http://freifunk.net/">Freifunk
</a>,
164 <a href=
"http://www.awmn.net/">Athens Wireless Metropolitan
165 Network
</a>,
<a href=
"http://en.wikipedia.org/wiki/Roofnet">Roofnet
</a>
166 and other successful mesh networks around the globe. Two days ago we
167 held a workshop to try to get people started on setting up their own
168 mesh node, and there we decided to create a new mailing list
169 <a href=
"http://lists.nuug.no/mailman/listinfo/dugnadsnett">dugnadsnett
170 (at) nuug.no
</a> and IRC channel
171 <a href=
"irc://irc.freenode.net/#dugnadsnett.no">#dugnadsnett.no
</a> to
172 coordinate the work. See also the NUUG blog post
173 <a href=
"http://www.nuug.no/news/E_postliste_og_IRC_kanal_for_Dugnadsnett_for_alle_i_Oslo.shtml">announcing
174 the mailing list and IRC channel
</a>.
</p>
179 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</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>.
184 <div class=
"padding"></div>
187 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/Hvor_godt_fungerer_Linux_klienter_mot_MS_Exchange_.html">Hvor godt fungerer Linux-klienter mot MS Exchange?
</a></div>
188 <div class=
"date">26th November
2013</div>
189 <div class=
"body"><p>Jeg
190 <a href=
"http://people.skolelinux.org/pere/blog/_pent_m_te_p__onsdag_om_bruken_av_Microsoft_Exchange_ved_Universitetet_i_Oslo.html">skrev
191 i juni om protestene
</a> på planene til min arbeidsplass,
192 <a href=
"http://www.uio.no/">Universitetet i Oslo
</a>, om å gå bort fra
193 fri programvare- og åpne standardløsninger for å håndtere epost,
194 vekk fra IETF-standarden SIEVE for filtrering av epost og over til
195 godseide spesifikasjoner og epostsystemet Microsoft Exchange.
196 Protestene har fått litt ny omtale i media de siste dagene, i tillegg
197 til de oppslagene som kom i mai.
</p>
201 <li>2013-
11-
26 <a href=
"http://www.version2.dk/artikel/gigantisk-outlook-konvertering-moeder-protester-paa-universitet-55147">Gigantisk Outlook-konvertering møder protester på universitet
</a> - versjon2.dk
</li>
204 <a href=
"http://www.idg.no/computerworld/article279407.ece">Microsoft-protest
205 på Universitetet
</a> - Computerworld
</li>
208 <a href=
"http://www.uniforum.uio.no/nyheter/2013/11/uio-bor-bruke-apen-programvare.html">Kjemper
209 mot innføring av Microsoft Exchange på UiO
</a> - Uniforum
</li>
212 <a href=
"http://www.uniforum.uio.no/nyheter/2013/11/uio-utsetter-innforing-av-nytt-e-postsystem.html">Utsetter
213 innføring av nytt e-postsystem
</a> - Uniforum
</li>
216 <a href=
"http://universitas.no/nyhet/58462/forsvarer-nytt-it-system">Forsvarer
217 nytt IT-system
</a> - Universitas
</li>
220 <a href=
"http://www.uniforum.uio.no/nyheter/2013/05/uio-innforer-nytt-epost-og-kalendersystem.html">UiO
221 innfører nytt epost- og kalenderverktøy
</a> - Uniforum
</li>
224 <a href=
"http://universitas.no/nyhet/58424/protestgruppe-vil-stanse-it-system">Protestgruppe
225 vil stanse IT-system
</a> - Universitas
</li>
228 <a href=
"http://www.uniforum.uio.no/leserbrev/2013/uio-ma-ha-kontroll-over-sitt-eget-epostsystem.html">UiO
229 må ha kontroll over sitt eget epostsystem
</a> - Uniforum
</li>
233 <p>Prosjektledelsen har fortalt at dette skal fungere like godt for
234 Linux-brukere som for brukere av Microsoft Windows og Apple MacOSX,
235 men jeg lurer på hva slags erfaringer Linux-brukere i eksisterende
236 miljøer som bruker MS Exchange har gjort. Hvis du har slik erfaring
237 hadet det vært veldig fint om du kan send et leserbrev til
238 <a href=
"http://www.uniforum.uio.no/">Uniforum
</a> og fortelle om hvor
239 greit det er å bruke Exchange i kryss-platform-miljøer? De jeg har
240 snakket med sier en greit får lest e-posten sin hvis Exchange har
241 slått på IMAP-funksjonalitet, men at kalender og møtebooking ikke
242 fungerer godt for Linux-klienter. Jeg har ingen personlig erfaring å
243 komme med, så jeg er nysgjerrig på hva andre kan dele av erfaringer
244 med universitetet.
</p>
246 <p>Mitt ankerpunkt mot å bytte ut fri programvare som fungerer godt
247 med godseid programvare er at en mister kontroll over egen
248 infrastruktur, låser seg inn i en løsning det vil bli dyrt å komme ut
249 av, uten at en får funksjonalitet en ikke kunne skaffet seg med fri
250 programvare, eventuelt videreutviklet med de pengene som brukes på
251 overgangen til MS Exchange. Personlig planlegger jeg å fortsette å
252 laste ned all eposten min til lokal maskin for indeksering og lesing
253 med
<a href==
"http://notmuchmail.org">notmuch
</a>, så jeg håper jeg
254 ikke blir veldig skadelidende av overgangen.
</p>
256 <p><a href=
"http://dinis.linguateca.pt/Diana/ImotMSUiO.html">Underskriftslista
257 for oss som er mot endringen
</a>, som omtales i artiklene, er fortsatt
258 åpen for de som vil signere på oppropet. Akkurat nå er det
298
259 personer som har signert.
</p>
264 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/norsk">norsk
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/standard">standard
</a>.
269 <div class=
"padding"></div>
272 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/New_chrpath_release_0_15.html">New chrpath release
0.15</a></div>
273 <div class=
"date">24th November
2013</div>
274 <div class=
"body"><p>After many years break from the package and a vain hope that
275 development would be continued by someone else, I finally pulled my
276 acts together this morning and wrapped up a new release of chrpath,
277 the command line tool to modify the rpath and runpath of already
278 compiled ELF programs. The update was triggered by the persistence of
279 Isha Vishnoi at IBM, which needed a new config.guess file to get
280 support for the ppc64le architecture (powerpc
64-bit Little Endian) he
281 is working on. I checked the
282 <a href=
"http://packages.qa.debian.org/chrpath">Debian
</a>,
283 <a href=
"https://launchpad.net/ubuntu/+source/chrpath">Ubuntu
</a> and
284 <a href=
"https://admin.fedoraproject.org/pkgdb/acls/name/chrpath">Fedora
</a>
285 packages for interesting patches (failed to find the source from
286 OpenSUSE and Mandriva packages), and found quite a few nice fixes.
287 These are the release notes:
</p>
289 <p>New in
0.15 released
2013-
11-
24:
</p>
293 <li>Updated config.sub and config.guess from the GNU project to work
294 with newer architectures. Thanks to isha vishnoi for the heads
297 <li>Updated README with current URLs.
</li>
299 <li>Added byteswap fix found in Ubuntu, credited Jeremy Kerr and
302 <li>Added missing help for -k|--keepgoing option, using patch by
303 Petr Machata found in Fedora.
</li>
305 <li>Rewrite removal of RPATH/RUNPATH to make sure the entry in
306 .dynamic is a NULL terminated string. Based on patch found in
307 Fedora credited Axel Thimm and Christian Krause.
</li>
312 <a href=
"https://alioth.debian.org/frs/?group_id=31052">download the
313 new version
0.15 from alioth
</a>. Please let us know via the Alioth
314 project if something is wrong with the new release. The test suite
315 did not discover any old errors, so if you find a new one, please also
316 include a testsuite check.
</p>
321 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>.
326 <div class=
"padding"></div>
329 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/RSS_kilde_for_friteksts_k_i_offentlige_anbud_hos_Doffin.html">RSS-kilde for fritekstsøk i offentlige anbud hos Doffin
</a></div>
330 <div class=
"date">22nd November
2013</div>
331 <div class=
"body"><p>I fjor sommer lagde jeg en
332 <a href=
"http://people.skolelinux.org/pere/blog/SQL_database_med_anbud_publisert_p__Doffin.html">offentlig
333 tilgjengelig SQL-database over offentlig anbud
</a> basert på skraping
334 av HTML-data fra Doffin. Den har stått og gått siden da, og har nå
335 ca.
28000 oppføringer. Jeg oppdaget da jeg tittet innom at noen
336 oppføringer var ikke blitt med, antagelig på grunn av at de fikk
337 tildelt sekvensnummer i Doffin en godt stund før de ble publisert,
338 slik at min nettsideskraper som fortsatte skrapingen der den slapp
339 sist ikke fikk dem med seg. Jeg har fikset litt slik at skraperen nå
340 ser litt tilbake i tid for å se om den har gått glipp av noen
341 oppføringer, og har skrapet på nytt fra midten av september
2013 og
342 fremover. Det bør dermed bli en mer komplett database for kommende
343 måneder. Hvis jeg får tid skal jeg forsøke å skrape "glemte" data fra
344 før midten av september
2013, men tør ikke garantere at det blir
345 prioritert med det første.
</p>
347 <p>Men målet med denne bloggposten er å vise hvordan denne
348 Doffin-databasen kan brukes og integreres med en RSS-leser, slik at en
349 kan la datamaskinen holde et øye med Doffin-annonseringer etter
350 nøkkelord. En kan lage sitt eget søk ved å besøke
351 <ahref=
"https://classic.scraperwiki.com/docs/api?name=norwegian-doffin#sqlite">API-et
352 hos Scraperwiki
</a>, velge format rss2 og så legge inn noe ala dette i
356 select title, scrapedurl as link, abstract as description,
357 publishdate as pubDate from 'swdata'
358 where abstract like '%linux%' or title like '%linux%'
359 order by seq desc limit
20
362 <p>Dette vil søke opp alle anbud med ordet linux i oppsummering eller
363 tittel. En kan lage mer avanserte søk hvis en ønsker det. URL-en som
364 dukker opp nederst på siden kan en så gi til sin RSS-leser (jeg bruker
365 akregator selv), og så automatisk få beskjed hvis det dukker opp anbud
366 med det aktuelle nøkkelordet i teksten. Merk at kapasiteten og
367 ytelsen hos Scraperwiki er begrenset, så ikke be RSS-leseren hente ned
368 oftere enn en gang hver dag.
</p>
370 <p>Du lurer kanskje på hva slags informasjon en kan få ut fra denne
371 databasen. Her er to RSS-kilder, med søkeordet
372 "
<a href=
"https://api.scraperwiki.com/api/1.0/datastore/sqlite?format=rss2&name=norwegian-doffin&query=select%20title%2C%20scrapedurl%20as%20link%2C%20abstract%20as%20description%2C%0A%20%20%20%20%20%20%20publishdate%20as%20pubDate%20from%20'swdata'%0A%20%20%20where%20abstract%20like%20'%25linux%25'%20or%20title%20like%20'%25linux%25'%0A%20%20%20order%20by%20seq%20desc%20limit%2020">linux
</a>",
374 "<a href=
"https://api.scraperwiki.com/api/1.0/datastore/sqlite?format=rss2&name=norwegian-doffin&query=select%20title%2C%20scrapedurl%20as%20link%2C%20abstract%20as%20description%2C%0A%20%20%20%20%20%20%20publishdate%20as%20pubDate%20from%20'swdata'%0A%20%20%20where%20abstract%20like%20'%25fri%20programvare%25'%20or%20title%20like%20'%25fri%20programvare%25'%0A%20%20%20order%20by%20seq%20desc%20limit%2020">fri
377 "<a href=
"https://api.scraperwiki.com/api/1.0/datastore/sqlite?format=rss2&name=norwegian-doffin&query=select%20title%2C%20scrapedurl%20as%20link%2C%20abstract%20as%20description%2C%0A%20%20%20%20%20%20%20publishdate%20as%20pubDate%20from%20'swdata'%0A%20%20%20where%20abstract%20like%20'%25odf%25'%20or%20title%20like%20'%25odf%25'%0A%20%20%20order%20by%20seq%20desc%20limit%2020">odf
</a>".
378 Det er bare å søke på det en er interessert i. Kopier gjerne
379 datasettet og sett opp din egen tjeneste hvis du vil gjøre mer
380 avanserte søk. SQLite-filen med Doffin-oppføringer kan lastes med fra
381 Scraperwiki for de som vil grave dypere.</p>
386 Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk
">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug
">nuug</a>, <a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn
">offentlig innsyn</a>.
391 <div class="padding
"></div>
394 <div class="title
"><a href="http://people.skolelinux.org/pere/blog/All_drones_should_be_radio_marked_with_what_they_do_and_who_they_belong_to.html
">All drones should be radio marked with what they do and who they belong to</a></div>
395 <div class="date
">21st November 2013</div>
396 <div class="body
"><p>Drones, flying robots, are getting more and more popular. The most
397 know ones are the killer drones used by some government to murder
398 people they do not like without giving them the chance of a fair
399 trial, but the technology have many good uses too, from mapping and
400 forest maintenance to photography and search and rescue. I am sure it
401 is just a question of time before "bad drones" are in the hands of
402 private enterprises and not only state criminals but petty criminals
403 too. The drone technology is very useful and very dangerous. To have
404 some control over the use of drones, I agree with Daniel Suarez in his
406 "
<a href=
"https://archive.org/details/DanielSuarez_2013G">The kill
407 decision shouldn't belong to a robot
</a>", where he suggested this
408 little gem to keep the good while limiting the bad use of drones:</p>
412 <p>Each robot and drone should have a cryptographically signed
413 I.D. burned in at the factory that can be used to track its movement
414 through public spaces. We have license plates on cars, tail numbers on
415 aircraft. This is no different. And every citizen should be able to
416 download an app that shows the population of drones and autonomous
417 vehicles moving through public spaces around them, both right now and
418 historically. And civic leaders should deploy sensors and civic drones
419 to detect rogue drones, and instead of sending killer drones of their
420 own up to shoot them down, they should notify humans to their
421 presence. And in certain very high-security areas, perhaps civic
422 drones would snare them and drag them off to a bomb disposal facility.</p>
424 <p>But notice, this is more an immune system than a weapons system. It
425 would allow us to avail ourselves of the use of autonomous vehicles
426 and drones while still preserving our open, civil society.</p>
430 <p>The key is that <em>every citizen</em> should be able to read the
431 radio beacons sent from the drones in the area, to be able to check
432 both the government and others use of drones. For such control to be
433 effective, everyone must be able to do it. What should such beacon
434 contain? At least formal owner, purpose, contact information and GPS
435 location. Probably also the origin and target position of the current
436 flight. And perhaps some registration number to be able to look up
437 the drone in a central database tracking their movement. Robots
438 should not have privacy. It is people who need privacy.</p>
443 Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english
">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/robot
">robot</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet
">sikkerhet</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance
">surveillance</a>.
448 <div class="padding
"></div>
451 <div class="title
"><a href="http://people.skolelinux.org/pere/blog/Lets_make_a_wireless_community_network_in_Oslo_.html
">Lets make a wireless community network in Oslo!</a></div>
452 <div class="date
">13th November 2013</div>
453 <div class="body
"><p>Today NUUG and Hackeriet announced
454 <a href="http://www.nuug.no/news/Bli_med___bygge_dugnadsnett_for_alle_i_Oslo.shtml
">our
455 plans to join forces and create a wireless community network in
456 Oslo</a>. The workshop to help people get started will take place
457 Thursday 2013-11-28, but we already are collecting the geolocation of
458 people joining forces to make this happen. We have
459 <a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/oslo-nodes.geojson
">9
460 locations plotted on the map</a>, but we will need more before we have
461 a connected mesh spread across Oslo. If this sound interesting to
462 you, please join us at the workshop. If you are too impatient to wait
463 15 days, please join us on the IRC channel
464 <a href="irc://irc.freenode.net/%
23nuug
">#nuug on irc.freenode.net</a>
470 Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english
">english</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>.
475 <div class="padding
"></div>
478 <div class="title
"><a href="http://people.skolelinux.org/pere/blog/Running_TP_Link_MR3040_as_a_batman_adv_mesh_node_using_openwrt.html
">Running TP-Link MR3040 as a batman-adv mesh node using openwrt</a></div>
479 <div class="date
">10th November 2013</div>
480 <div class="body
"><p>Continuing my research into mesh networking, I was recommended to
481 use TP-Link 3040 and 3600 access points as mesh nodes, and the pair I
482 bought arrived on Friday. Here are my notes on how to set up the
483 MR3040 as a mesh node using
484 <a href="http://www.openwrt.org/
">OpenWrt</a>.</p>
486 <p>I started by following the instructions on the OpenWRT wiki for
487 <a href="http://wiki.openwrt.org/toh/tp-link/tl-mr3040
">TL-MR3040</a>,
489 <a href="http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin
">the
490 recommended firmware image</a>
491 (openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin) and
492 uploaded it into the original web interface. The flashing went fine,
493 and the machine was available via telnet on the ethernet port. After
494 logging in and setting the root password, ssh was available and I
495 could start to set it up as a batman-adv mesh node.</p>
497 <p>I started off by reading the instructions from
498 <a href="http://wirelessafrica.meraka.org.za/wiki/index.php?title=Antoine's_Research
">Wireless
499 Africa</a>, which had quite a lot of useful information, but
500 eventually I followed the recipe from the Open Mesh wiki for
501 <a href="http://www.open-mesh.org/projects/batman-adv/wiki/Batman-adv-openwrt-config
">using
502 batman-adv on OpenWrt</a>. A small snag was the fact that the
503 <tt>opkg install kmod-batman-adv</tt> command did not work as it
504 should. The batman-adv kernel module would fail to load because its
505 dependency crc16 was not already loaded. I
506 <a href="https://dev.openwrt.org/ticket/
14452">reported the bug</a> to
507 the openwrt project and hope it will be fixed soon. But the problem
508 only seem to affect initial testing of batman-adv, as configuration
509 seem to work when booting from scratch.</p>
511 <p>The setup is done using files in /etc/config/. I did not bridge
512 the Ethernet and mesh interfaces this time, to be able to hook up the
513 box on my local network and log into it for configuration updates.
514 The following files were changed and look like this after modifying
517 <p><tt>/etc/config/network</tt></p>
521 config interface 'loopback'
523 option proto 'static'
524 option ipaddr '127.0.0.1'
525 option netmask '255.0.0.0'
527 config globals 'globals'
528 option ula_prefix 'fdbf:4c12:3fed::/48'
530 config interface 'lan'
534 option ipaddr '192.168.1.1'
535 option netmask '255.255.255.0'
536 option hostname 'tl-mr3040'
537 option ip6assign '60'
539 config interface 'mesh'
540 option ifname 'adhoc0'
542 option proto 'batadv'
546 <p><tt>/etc/config/wireless</tt></p>
549 config wifi-device 'radio0'
550 option type 'mac80211'
553 option path 'platform/ar933x_wmac'
555 list ht_capab 'SHORT-GI-20'
556 list ht_capab 'SHORT-GI-40'
557 list ht_capab 'RX-STBC1'
558 list ht_capab 'DSSS_CCK-40'
561 config wifi-iface 'wmesh'
562 option device 'radio0'
563 option ifname 'adhoc0'
564 option network 'mesh'
565 option encryption 'none'
567 option bssid '02:BA:00:00:00:01'
568 option ssid 'meshfx@hackeriet'
570 <p><tt>/etc/config/batman-adv</tt></p>
574 option interfaces 'adhoc0'
575 option 'aggregated_ogms'
576 option 'ap_isolation'
578 option 'fragmentation'
579 option 'gw_bandwidth'
581 option 'gw_sel_class'
583 option 'orig_interval'
585 option 'bridge_loop_avoidance'
586 option 'distributed_arp_table'
587 option 'network_coding'
590 # yet another batX instance
591 # config 'mesh' 'bat5'
592 # option 'interfaces' 'second_mesh'
595 <p>The mesh node is now operational. I have yet to test its range,
596 but I hope it is good. I have not yet tested the TP-Link 3600 box
597 still wrapped up in plastic.</p>
602 Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english
">english</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>.
607 <div class="padding
"></div>
610 <div class="title
"><a href="http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html
">Debian init.d boot script example for rsyslog</a></div>
611 <div class="date
"> 2nd November 2013</div>
612 <div class="body
"><p>If one of the points of switching to a new init system in Debian is
613 <a href="http://thomas.goirand.fr/blog/?p=
147">to get rid of huge
614 init.d scripts</a>, I doubt we need to switch away from sysvinit and
615 init.d scripts at all. Here is an example init.d script, ie a rewrite
616 of /etc/init.d/rsyslog:</p>
619 #!/lib/init/init-d-script
622 # Required-Start: $remote_fs $time
623 # Required-Stop: umountnfs $time
624 # X-Stop-After: sendsigs
625 # Default-Start: 2 3 4 5
626 # Default-Stop: 0 1 6
627 # Short-Description: enhanced syslogd
628 # Description: Rsyslog is an enhanced multi-threaded syslogd.
629 # It is quite compatible to stock sysklogd and can be
630 # used as a drop-in replacement.
632 DESC="enhanced syslogd"
633 DAEMON=/usr/sbin/rsyslogd
636 <p>Pretty minimalistic to me... For the record, the original sysv-rc
637 script was
137 lines, and the above is just
15 lines, most of it meta
640 <p>How to do this, you ask? Well, one create a new script
641 /lib/init/init-d-script looking something like this:
646 # Define LSB log_* functions.
647 # Depend on lsb-base (
>=
3.2-
14) to ensure that this file is present
648 # and status_of_proc is working.
649 . /lib/lsb/init-functions
652 # Function that starts the daemon/service
658 #
0 if daemon has been started
659 #
1 if daemon was already running
660 #
2 if daemon could not be started
661 start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test
> /dev/null \
663 start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
666 # Add code here, if necessary, that waits for the process to be ready
667 # to handle requests from services started subsequently which depend
668 # on this one. As a last resort, sleep for some time.
672 # Function that stops the daemon/service
677 #
0 if daemon has been stopped
678 #
1 if daemon was already stopped
679 #
2 if daemon could not be stopped
680 # other if a failure occurred
681 start-stop-daemon --stop --quiet --retry=TERM/
30/KILL/
5 --pidfile $PIDFILE --name $NAME
683 [ "$RETVAL" =
2 ] && return
2
684 # Wait for children to finish too if this is a daemon that forks
685 # and if the daemon is only ever run from this initscript.
686 # If the above conditions are not satisfied then add some other code
687 # that waits for the process to drop all resources that could be
688 # needed by services started subsequently. A last resort is to
689 # sleep for some time.
690 start-stop-daemon --stop --quiet --oknodo --retry=
0/
30/KILL/
5 --exec $DAEMON
691 [ "$?" =
2 ] && return
2
692 # Many daemons don't delete their pidfiles when they exit.
698 # Function that sends a SIGHUP to the daemon/service
702 # If the daemon can reload its configuration without
703 # restarting (for example, when it is sent a SIGHUP),
704 # then implement that here.
706 start-stop-daemon --stop --signal
1 --quiet --pidfile $PIDFILE --name $NAME
711 scriptbasename="$(basename $
1)"
712 echo "SN: $scriptbasename"
713 if [ "$scriptbasename" != "init-d-library" ] ; then
721 NAME=$(basename $DAEMON)
722 PIDFILE=/var/run/$NAME.pid
724 # Exit if the package is not installed
725 #[ -x "$DAEMON" ] || exit
0
727 # Read configuration variable file if it is present
728 [ -r /etc/default/$NAME ] && . /etc/default/$NAME
730 # Load the VERBOSE setting and other rcS variables
735 [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
738 0|
1) [ "$VERBOSE" != no ] && log_end_msg
0 ;;
739 2) [ "$VERBOSE" != no ] && log_end_msg
1 ;;
743 [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
746 0|
1) [ "$VERBOSE" != no ] && log_end_msg
0 ;;
747 2) [ "$VERBOSE" != no ] && log_end_msg
1 ;;
751 status_of_proc "$DAEMON" "$NAME" && exit
0 || exit $?
753 #reload|force-reload)
755 # If do_reload() is not implemented then leave this commented out
756 # and leave 'force-reload' as an alias for 'restart'.
758 #log_daemon_msg "Reloading $DESC" "$NAME"
762 restart|force-reload)
764 # If the "reload" option is implemented then remove the
765 # 'force-reload' alias
767 log_daemon_msg "Restarting $DESC" "$NAME"
774 1) log_end_msg
1 ;; # Old process is still running
775 *) log_end_msg
1 ;; # Failed to start
785 echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}"
>&
2
793 <p>It is based on /etc/init.d/skeleton, and could be improved quite a
794 lot. I did not really polish the approach, so it might not always
795 work out of the box, but you get the idea. I did not try very hard to
796 optimize it nor make it more robust either.
</p>
798 <p>A better argument for switching init system in Debian than reducing
799 the size of init scripts (which is a good thing to do anyway), is to
800 get boot system that is able to handle the kernel events sensibly and
801 robustly, and do not depend on the boot to run sequentially. The boot
802 and the kernel have not behaved sequentially in years.
</p>
807 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/debian">debian
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>.
812 <div class=
"padding"></div>
815 <div class=
"title"><a href=
"http://people.skolelinux.org/pere/blog/Browser_plugin_for_SPICE__spice_xpi__uploaded_to_Debian.html">Browser plugin for SPICE (spice-xpi) uploaded to Debian
</a></div>
816 <div class=
"date"> 1st November
2013</div>
817 <div class=
"body"><p><a href=
"http://www.spice-space.org/">The SPICE protocol
</a> for
818 remote display access is the preferred solution with oVirt and RedHat
819 Enterprise Virtualization, and I was sad to discover the other day
820 that the browser plugin needed to use these systems seamlessly was
821 missing in Debian. The
<a href=
"http://bugs.debian.org/668284">request
822 for a package
</a> was from
2012-
04-
10 with no progress since
823 2013-
04-
01, so I decided to wrap up a package based on the great work
824 from Cajus Pollmeier and put it in a collab-maint maintained git
825 repository to get a package I could use. I would very much like
826 others to help me maintain the package (or just take over, I do not
827 mind), but as no-one had volunteered so far, I just uploaded it to
828 NEW. I hope it will be available in Debian in a few days.
</p>
830 <p>The source is now available from
831 <a href=
"http://anonscm.debian.org/gitweb/?p=collab-maint/spice-xpi.git;a=summary">http://anonscm.debian.org/gitweb/?p=collab-maint/spice-xpi.git;a=summary
</a>.
</p>
836 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>.
841 <div class=
"padding"></div>
843 <p style=
"text-align: right;"><a href=
"index.rss"><img src=
"http://people.skolelinux.org/pere/blog/xml.gif" alt=
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"http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (
25)
</a></li>
1064 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/norsk">norsk (
238)
</a></li>
1066 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/nuug">nuug (
160)
</a></li>
1068 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (
9)
</a></li>
1070 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/open311">open311 (
2)
</a></li>
1072 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (
45)
</a></li>
1074 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/personvern">personvern (
67)
</a></li>
1076 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/raid">raid (
1)
</a></li>
1078 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/reprap">reprap (
11)
</a></li>
1080 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/rfid">rfid (
2)
</a></li>
1082 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/robot">robot (
9)
</a></li>
1084 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/rss">rss (
1)
</a></li>
1086 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/ruter">ruter (
4)
</a></li>
1088 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (
2)
</a></li>
1090 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (
33)
</a></li>
1092 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (
4)
</a></li>
1094 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (
4)
</a></li>
1096 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/standard">standard (
44)
</a></li>
1098 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (
3)
</a></li>
1100 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (
9)
</a></li>
1102 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (
21)
</a></li>
1104 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (
1)
</a></li>
1106 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/valg">valg (
8)
</a></li>
1108 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/video">video (
39)
</a></li>
1110 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (
4)
</a></li>
1112 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/web">web (
28)
</a></li>
1118 <p style=
"text-align: right">
1119 Created by
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