<atom:link href="http://people.skolelinux.org/pere/blog/index.rss" rel="self" type="application/rss+xml" />
<item>
- <title>Debian Edu interview: Klaus Knopper</title>
- <link>http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Klaus_Knopper.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Klaus_Knopper.html</guid>
- <pubDate>Fri, 6 Dec 2013 09:50:00 +0100</pubDate>
- <description><p>It has been a while since I managed to publish the last interview,
-but the <a href="http://www.skolelinux.org/">Debian Edu /
-Skolelinux</a> community is still going strong, and yesterday we even
-had a new school administrator show up on
-<a href="irc://irc.debian.org/#debian-edu">#debian-edu</a> to share
-his success story with installing Debian Edu at their school. This
-time I have been able to get some helpful comments from the creator of
-Knoppix, Klaus Knopper, who was involved in a Skolelinux project in
-Germany a few years ago.</p>
-
-<p><strong>Who are you, and how do you spend your days?</strong></p>
-
-<p>I am Klaus Knopper. I have a master degree in electrical
-engineering, and is currently professor in information management at
-the university of applied sciences Kaiserslautern / Germany and
-freelance Open Source software developer and consultant.</p>
-
-<p>All of this is pretty much of the work I spend my days with. Apart
-from teaching, I'm also conducting some more or less experimental
-projects like the <a href="http://www.knoppix.org">Knoppix GNU/Linux live
-system</a> (Debian-based like Skolelinux),
-<a href="http://www.knopper.net/knoppix-adriane/index-en.html">ADRIANE</a>
-(a blind-friendly talking desktop system) and
-<a href="http://www.knopper.net/linbo/index-en.html">LINBO</a>
-(Linux-based network boot console, a fast remote install and repair
-system supporting various operating systems).</p>
-
-<p><strong>How did you get in contact with the Skolelinux / Debian Edu
-project?</strong></p>
-
-<p>The credit for this have to go to Kurt Gramlich, who is the German
-coordinator for Skolelinux. We were looking for an all-in-one open
-source community-supported distribution for schools, and Kurt
-introduced us to Skolelinux for this purpose.</p>
-
-<p><strong>What do you see as the advantages of Skolelinux / Debian
-Edu?</strong></p>
-
-<ul>
- <li>Quick installation,</li>
- <li>works (almost) out of the box,</li>
- <li>contains many useful software packages for teaching and learning,</li>
- <li>is a purely community-based distro and not controlled by a
- single company,</li>
- <li>has a large number of supporters and teachers who share their
- experience and problem solutions.</li>
-</ul>
-
-<p><strong>What do you see as the disadvantages of Skolelinux / Debian
-Edu?</strong></p>
-
-<ul>
- <li>Skolelinux is - as we had to learn - not easily upgradable to
- the next version. Opposed to its genuine Debian base, upgrading to
- a new version means a full new installation from scratch to get it
- working again reliably.
-
- <li>Skolelinux is based on Debian/stable, and therefore always a
- little outdated in terms of program versions compared to Edubuntu or
- similar educational Linux distros, which rather use Debian/testing
- as their base.
-
- <li>Skolelinux has some very self-opinionated and stubborn default
- configuration which in my opinion adds unnecessary complexity and is
- not always suitable for a schools needs, the preset network
- configuration is actually a core definition feature of Skolelinux
- and not easy to change, so schools sometimes have to change their
- network configuration to make it "Skolelinux-compatible".
-
- <li>Some proposed extensions, which were made available as
- contribution, like secure examination mode and lecture material
- distribution and collection, were not accepted into the mainline
- Skolelinux development and are now not easy to maintain in the
- future because of Skolelinux somewhat undeterministic update
- schemes.</li>
-
- <li>Skolelinux has only a very tiny number of base developers
- compared to Debian.</li>
-
-</ul>
-
-<p>For these reasons and experience from our project, I would now
-rather consider using plain Debian for schools next time, until
-Skolelinux is more closely integrated into Debian and becomes
-upgradeable without reinstallation.</p>
-
-<p><strong>Which free software do you use daily?</strong></p>
-
-<p>GNU/Linux with LXDE desktop, bash for interactive dialog and
-programming, texlive for documentation and correspondence,
-occasionally LibreOffice for document format conversion. Various
-programming languages for teaching.</p>
-
-<p><strong>Which strategy do you believe is the right one to use to
-get schools to use free software?</strong></p>
-
-<p>Strong arguments are
+ <title>Hva henger under skibrua over E16 på Sollihøgda?</title>
+ <link>http://people.skolelinux.org/pere/blog/Hva_henger_under_skibrua_over_E16_p__Sollih_gda_.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Hva_henger_under_skibrua_over_E16_p__Sollih_gda_.html</guid>
+ <pubDate>Sun, 21 Sep 2014 09:50:00 +0200</pubDate>
+ <description><p>Rundt omkring i Oslo og Østlandsområdet henger det bokser over
+veiene som jeg har lurt på hva gjør. De har ut fra plassering og
+vinkling sett ut som bokser som sniffer ut et eller annet fra
+forbipasserende trafikk, men det har vært uklart for meg hva det er de
+leser av. Her om dagen tok jeg bilde av en slik boks som henger under
+<a href="http://www.openstreetmap.no/?zoom=19&mlat=59.96396&mlon=10.34443&layers=B00000">ei
+skibru på Sollihøgda</a>:</p>
+
+<p align="center"><img width="60%" src="http://people.skolelinux.org/pere/blog/images/2014-09-13-kapsch-sollihogda-crop.jpeg"></p>
+
+<p>Boksen er tydelig merket «Kapsch >>>», logoen til
+<a href="http://www.kapsch.net/">det sveitsiske selskapet Kapsch</a> som
+blant annet lager sensorsystemer for veitrafikk. Men de lager mye
+forskjellig, og jeg kjente ikke igjen boksen på utseendet etter en
+kjapp titt på produktlista til selskapet.</p>
+
+<p>I og med at boksen henger over veien E16, en riksvei vedlikeholdt
+av Statens Vegvesen, så antok jeg at det burde være mulig å bruke
+REST-API-et som gir tilgang til vegvesenets database over veier,
+skilter og annet veirelatert til å finne ut hva i alle dager dette
+kunne være. De har både
+<a href="https://www.vegvesen.no/nvdb/api/dokumentasjon/datakatalog">en
+datakatalog</a> og
+<a href="https://www.vegvesen.no/nvdb/api/dokumentasjon/sok">et
+søk</a>, der en kan søke etter ulike typer oppføringer innen for et
+gitt geografisk område. Jeg laget et enkelt shell-script for å hente
+ut antall av en gitt type innenfor området skibrua dekker, og listet
+opp navnet på typene som ble funnet. Orket ikke slå opp hvordan
+URL-koding av aktuelle strenger kunne gjøres mer generisk, og brukte
+en stygg sed-linje i stedet.</p>
+
+<blockquote><pre>
+#!/bin/sh
+urlmap() {
+ sed \
+ -e 's/ / /g' -e 's/{/%7B/g' \
+ -e 's/}/%7D/g' -e 's/\[/%5B/g' \
+ -e 's/\]/%5D/g' -e 's/ /%20/g' \
+ -e 's/,/%2C/g' -e 's/\"/%22/g' \
+ -e 's/:/%3A/g'
+}
-<ul>
+lookup() {
+ url="$1"
+ curl -s -H 'Accept: application/vnd.vegvesen.nvdb-v1+xml' \
+ "https://www.vegvesen.no/nvdb/api$url" | xmllint --format -
+}
- <li>Knowledge is free, and so should be methods and tools for
- teaching and learning.</li>
+for id in $(seq 1 874) ; do
+ search="{
+ lokasjon: {
+ bbox: \"10.34425,59.96386,10.34458,59.96409\",
+ srid: \"WGS84\"
+ },
+ objektTyper: [{
+ id: $id, antall: 10
+ }]
+}"
+
+ query=/sok?kriterie=$(echo $search | urlmap)
+ if lookup "$query" |
+ grep -q '&lt;totaltAntallReturnert>0&lt;'
+ then
+ :
+ else
+ echo $id
+ lookup "/datakatalog/objekttyper/$id" |grep '^ &lt;navn>'
+ fi
+done
+
+exit 0
+</pre></blockquote>
+
+Aktuelt ID-område 1-874 var riktig i datakatalogen da jeg laget
+scriptet. Det vil endre seg over tid. Skriptet listet så opp
+aktuelle typer i og rundt skibrua:
+
+<blockquote><pre>
+5
+ &lt;navn>Rekkverk&lt;/navn>
+14
+ &lt;navn>Rekkverksende&lt;/navn>
+47
+ &lt;navn>Trafikklomme&lt;/navn>
+49
+ &lt;navn>Trafikkøy&lt;/navn>
+60
+ &lt;navn>Bru&lt;/navn>
+79
+ &lt;navn>Stikkrenne/Kulvert&lt;/navn>
+80
+ &lt;navn>Grøft, åpen&lt;/navn>
+86
+ &lt;navn>Belysningsstrekning&lt;/navn>
+95
+ &lt;navn>Skiltpunkt&lt;/navn>
+96
+ &lt;navn>Skiltplate&lt;/navn>
+98
+ &lt;navn>Referansestolpe&lt;/navn>
+99
+ &lt;navn>Vegoppmerking, langsgående&lt;/navn>
+105
+ &lt;navn>Fartsgrense&lt;/navn>
+106
+ &lt;navn>Vinterdriftsstrategi&lt;/navn>
+172
+ &lt;navn>Trafikkdeler&lt;/navn>
+241
+ &lt;navn>Vegdekke&lt;/navn>
+293
+ &lt;navn>Breddemåling&lt;/navn>
+301
+ &lt;navn>Kantklippareal&lt;/navn>
+318
+ &lt;navn>Snø-/isrydding&lt;/navn>
+445
+ &lt;navn>Skred&lt;/navn>
+446
+ &lt;navn>Dokumentasjon&lt;/navn>
+452
+ &lt;navn>Undergang&lt;/navn>
+528
+ &lt;navn>Tverrprofil&lt;/navn>
+532
+ &lt;navn>Vegreferanse&lt;/navn>
+534
+ &lt;navn>Region&lt;/navn>
+535
+ &lt;navn>Fylke&lt;/navn>
+536
+ &lt;navn>Kommune&lt;/navn>
+538
+ &lt;navn>Gate&lt;/navn>
+539
+ &lt;navn>Transportlenke&lt;/navn>
+540
+ &lt;navn>Trafikkmengde&lt;/navn>
+570
+ &lt;navn>Trafikkulykke&lt;/navn>
+571
+ &lt;navn>Ulykkesinvolvert enhet&lt;/navn>
+572
+ &lt;navn>Ulykkesinvolvert person&lt;/navn>
+579
+ &lt;navn>Politidistrikt&lt;/navn>
+583
+ &lt;navn>Vegbredde&lt;/navn>
+591
+ &lt;navn>Høydebegrensning&lt;/navn>
+592
+ &lt;navn>Nedbøyningsmåling&lt;/navn>
+597
+ &lt;navn>Støy-luft, Strekningsdata&lt;/navn>
+601
+ &lt;navn>Oppgravingsdata&lt;/navn>
+602
+ &lt;navn>Oppgravingslag&lt;/navn>
+603
+ &lt;navn>PMS-parsell&lt;/navn>
+604
+ &lt;navn>Vegnormalstrekning&lt;/navn>
+605
+ &lt;navn>Værrelatert strekning&lt;/navn>
+616
+ &lt;navn>Feltstrekning&lt;/navn>
+617
+ &lt;navn>Adressepunkt&lt;/navn>
+626
+ &lt;navn>Friksjonsmåleserie&lt;/navn>
+629
+ &lt;navn>Vegdekke, flatelapping&lt;/navn>
+639
+ &lt;navn>Kurvatur, horisontalelement&lt;/navn>
+640
+ &lt;navn>Kurvatur, vertikalelement&lt;/navn>
+642
+ &lt;navn>Kurvatur, vertikalpunkt&lt;/navn>
+643
+ &lt;navn>Statistikk, trafikkmengde&lt;/navn>
+647
+ &lt;navn>Statistikk, vegbredde&lt;/navn>
+774
+ &lt;navn>Nedbøyningsmåleserie&lt;/navn>
+775
+ &lt;navn>ATK, influensstrekning&lt;/navn>
+794
+ &lt;navn>Systemobjekt&lt;/navn>
+810
+ &lt;navn>Vinterdriftsklasse&lt;/navn>
+821
+ &lt;navn>Funksjonell vegklasse&lt;/navn>
+825
+ &lt;navn>Kurvatur, stigning&lt;/navn>
+838
+ &lt;navn>Vegbredde, beregnet&lt;/navn>
+862
+ &lt;navn>Reisetidsregistreringspunkt&lt;/navn>
+871
+ &lt;navn>Bruksklasse&lt;/navn>
+</pre></blockquote>
+
+<p>Av disse ser ID 775 og 862 mest relevant ut. ID 775 antar jeg
+refererer til fotoboksen som står like ved brua, mens
+«Reisetidsregistreringspunkt» kanskje kan være boksen som henger der.
+Hvordan finner jeg så ut hva dette kan være for noe. En titt på
+<a href="http://labs.vegdata.no/nvdb-datakatalog/862-Reisetidsregistreringspunkt/">datakatalogsiden
+for ID 862/Reisetidsregistreringspunkt</a> viser at det er finnes 53
+slike målere i Norge, og hvor de er plassert, men gir ellers få
+detaljer. Det er plassert 40 på østlandet og 13 i Trondheimsregionen.
+Men siden nevner «AutoPASS», og hvis en slår opp oppføringen på
+Sollihøgda nevner den «Ciber AS» som ID for eksternt system. (Kan det
+være snakk om
+<a href="http://www.proff.no/selskap/ciber-norge-as/oslo/internettdesign-og-programmering/Z0I3KMF4/">Ciber
+Norge AS</a>, et selskap eid av Ciber Europe Bv?) Et nettsøk på
+ «Ciber AS autopass» fører meg til en artikkel fra NRK Trøndelag i
+ 2013 med tittel
+«<a href="http://www.nrk.no/trondelag/sjekk-dette-hvis-du-vil-unnga-ko-1.11327947">Sjekk
+dette hvis du vil unngå kø</a>». Artikkelen henviser til vegvesenets
+nettside
+<a href="http://www.reisetider.no/reisetid/forside.html">reisetider.no</a>
+som har en
+<a href="http://www.reisetider.no/reisetid/omrade.html?omrade=5">kartside
+for Østlandet</a> som viser at det måles mellom Sandvika og Sollihøgda.
+Det kan dermed se ut til at jeg har funnet ut hva boksene gjør.</p>
+
+<p>Hvis det stemmer, så er dette bokser som leser av AutoPASS-ID-en
+til alle passerende biler med AutoPASS-brikke, og dermed gjør det mulig
+for de som kontrollerer boksene å holde rede på hvor en gitt bil er
+når den passerte et slikt målepunkt. NRK-artikkelen forteller at
+denne informasjonen i dag kun brukes til å koble to
+AutoPASS-brikkepasseringer passeringer sammen for å beregne
+reisetiden, og at bruken er godkjent av Datatilsynet. Det er desverre
+ikke mulig for en sjåfør som passerer under en slik boks å kontrollere
+at AutoPASS-ID-en kun brukes til dette i dag og i fremtiden.</p>
+
+<p>I tillegg til denne type AutoPASS-sniffere vet jeg at det også
+finnes mange automatiske stasjoner som tar betalt pr. passering (aka
+bomstasjoner), og der lagres informasjon om tid, sted og bilnummer i
+10 år. Finnes det andre slike sniffere plassert ut på veiene?</p>
+
+<p>Personlig har jeg valgt å ikke bruke AutoPASS-brikke, for å gjøre
+det vanskeligere og mer kostbart for de som vil invadere privatsfæren
+og holde rede på hvor bilen min beveger seg til enhver tid. Jeg håper
+flere vil gjøre det samme, selv om det gir litt høyere private
+utgifter (dyrere bompassering). Vern om privatsfæren koster i disse
+dager.</p>
+
+<p>Takk til Jan Kristian Jensen i Statens Vegvesen for tips om
+dokumentasjon på vegvesenets REST-API.</p>
+</description>
+ </item>
+
+ <item>
+ <title>Speeding up the Debian installer using eatmydata and dpkg-divert</title>
+ <link>http://people.skolelinux.org/pere/blog/Speeding_up_the_Debian_installer_using_eatmydata_and_dpkg_divert.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Speeding_up_the_Debian_installer_using_eatmydata_and_dpkg_divert.html</guid>
+ <pubDate>Tue, 16 Sep 2014 14:00:00 +0200</pubDate>
+ <description><p>The <a href="https://www.debian.org/">Debian</a> installer could be
+a lot quicker. When we install more than 2000 packages in
+<a href="http://www.skolelinux.org/">Skolelinux / Debian Edu</a> using
+tasksel in the installer, unpacking the binary packages take forever.
+A part of the slow I/O issue was discussed in
+<a href="https://bugs.debian.org/613428">bug #613428</a> about too
+much file system sync-ing done by dpkg, which is the package
+responsible for unpacking the binary packages. Other parts (like code
+executed by postinst scripts) might also sync to disk during
+installation. All this sync-ing to disk do not really make sense to
+me. If the machine crash half-way through, I start over, I do not try
+to salvage the half installed system. So the failure sync-ing is
+supposed to protect against, hardware or system crash, is not really
+relevant while the installer is running.</p>
+
+<p>A few days ago, I thought of a way to get rid of all the file
+system sync()-ing in a fairly non-intrusive way, without the need to
+change the code in several packages. The idea is not new, but I have
+not heard anyone propose the approach using dpkg-divert before. It
+depend on the small and clever package
+<a href="https://packages.qa.debian.org/eatmydata">eatmydata</a>, which
+uses LD_PRELOAD to replace the system functions for syncing data to
+disk with functions doing nothing, thus allowing programs to live
+dangerous while speeding up disk I/O significantly. Instead of
+modifying the implementation of dpkg, apt and tasksel (which are the
+packages responsible for selecting, fetching and installing packages),
+it occurred to me that we could just divert the programs away, replace
+them with a simple shell wrapper calling
+"eatmydata&nbsp;$program&nbsp;$@", to get the same effect.
+Two days ago I decided to test the idea, and wrapped up a simple
+implementation for the Debian Edu udeb.</p>
+
+<p>The effect was stunning. In my first test it reduced the running
+time of the pkgsel step (installing tasks) from 64 to less than 44
+minutes (20 minutes shaved off the installation) on an old Dell
+Latitude D505 machine. I am not quite sure what the optimised time
+would have been, as I messed up the testing a bit, causing the debconf
+priority to get low enough for two questions to pop up during
+installation. As soon as I saw the questions I moved the installation
+along, but do not know how long the question were holding up the
+installation. I did some more measurements using Debian Edu Jessie,
+and got these results. The time measured is the time stamp in
+/var/log/syslog between the "pkgsel: starting tasksel" and the
+"pkgsel: finishing up" lines, if you want to do the same measurement
+yourself. In Debian Edu, the tasksel dialog do not show up, and the
+timing thus do not depend on how quickly the user handle the tasksel
+dialog.</p>
+
+<p><table>
+
+<tr>
+<th>Machine/setup</th>
+<th>Original tasksel</th>
+<th>Optimised tasksel</th>
+<th>Reduction</th>
+</tr>
+
+<tr>
+<td>Latitude D505 Main+LTSP LXDE</td>
+<td>64 min (07:46-08:50)</td>
+<td><44 min (11:27-12:11)</td>
+<td>>20 min 18%</td>
+</tr>
+
+<tr>
+<td>Latitude D505 Roaming LXDE</td>
+<td>57 min (08:48-09:45)</td>
+<td>34 min (07:43-08:17)</td>
+<td>23 min 40%</td>
+</tr>
+
+<tr>
+<td>Latitude D505 Minimal</td>
+<td>22 min (10:37-10:59)</td>
+<td>11 min (11:16-11:27)</td>
+<td>11 min 50%</td>
+</tr>
+
+<tr>
+<td>Thinkpad X200 Minimal</td>
+<td>6 min (08:19-08:25)</td>
+<td>4 min (08:04-08:08)</td>
+<td>2 min 33%</td>
+</tr>
+
+<tr>
+<td>Thinkpad X200 Roaming KDE</td>
+<td>19 min (09:21-09:40)</td>
+<td>15 min (10:25-10:40)</td>
+<td>4 min 21%</td>
+</tr>
+
+</table></p>
+
+<p>The test is done using a netinst ISO on a USB stick, so some of the
+time is spent downloading packages. The connection to the Internet
+was 100Mbit/s during testing, so downloading should not be a
+significant factor in the measurement. Download typically took a few
+seconds to a few minutes, depending on the amount of packages being
+installed.</p>
+
+<p>The speedup is implemented by using two hooks in
+<a href="https://www.debian.org/devel/debian-installer/">Debian
+Installer</a>, the pre-pkgsel.d hook to set up the diverts, and the
+finish-install.d hook to remove the divert at the end of the
+installation. I picked the pre-pkgsel.d hook instead of the
+post-base-installer.d hook because I test using an ISO without the
+eatmydata package included, and the post-base-installer.d hook in
+Debian Edu can only operate on packages included in the ISO. The
+negative effect of this is that I am unable to activate this
+optimization for the kernel installation step in d-i. If the code is
+moved to the post-base-installer.d hook, the speedup would be larger
+for the entire installation.</p>
+
+<p>I've implemented this in the
+<a href="https://packages.qa.debian.org/debian-edu-install">debian-edu-install</a>
+git repository, and plan to provide the optimization as part of the
+Debian Edu installation. If you want to test this yourself, you can
+create two files in the installer (or in an udeb). One shell script
+need do go into /usr/lib/pre-pkgsel.d/, with content like this:</p>
+
+<p><blockquote><pre>
+#!/bin/sh
+set -e
+. /usr/share/debconf/confmodule
+info() {
+ logger -t my-pkgsel "info: $*"
+}
+error() {
+ logger -t my-pkgsel "error: $*"
+}
+override_install() {
+ apt-install eatmydata || true
+ if [ -x /target/usr/bin/eatmydata ] ; then
+ for bin in dpkg apt-get aptitude tasksel ; do
+ file=/usr/bin/$bin
+ # Test that the file exist and have not been diverted already.
+ if [ -f /target$file ] ; then
+ info "diverting $file using eatmydata"
+ printf "#!/bin/sh\neatmydata $bin.distrib \"\$@\"\n" \
+ > /target$file.edu
+ chmod 755 /target$file.edu
+ in-target dpkg-divert --package debian-edu-config \
+ --rename --quiet --add $file
+ ln -sf ./$bin.edu /target$file
+ else
+ error "unable to divert $file, as it is missing."
+ fi
+ done
+ else
+ error "unable to find /usr/bin/eatmydata after installing the eatmydata pacage"
+ fi
+}
- <li>Students can learn with and use the same software at school, at
- home, and at their working place without running into license or
- conversion problems.</li>
+override_install
+</pre></blockquote></p>
- <li>Closed source or proprietary software hides knowledge rather
- than exposing it, and proprietary software vendors try to bind
- customers to certain products. But teachers need to teach
- science, not products.</li>
+<p>To clean up, another shell script should go into
+/usr/lib/finish-install.d/ with code like this:
- <li>If you have everything you for daily work as open source, what
- would you need proprietary software for?</li>
+<p><blockquote><pre>
+#! /bin/sh -e
+. /usr/share/debconf/confmodule
+error() {
+ logger -t my-finish-install "error: $@"
+}
+remove_install_override() {
+ for bin in dpkg apt-get aptitude tasksel ; do
+ file=/usr/bin/$bin
+ if [ -x /target$file.edu ] ; then
+ rm /target$file
+ in-target dpkg-divert --package debian-edu-config \
+ --rename --quiet --remove $file
+ rm /target$file.edu
+ else
+ error "Missing divert for $file."
+ fi
+ done
+ sync # Flush file buffers before continuing
+}
-</ul>
+remove_install_override
+</pre></blockquote></p>
+
+<p>In Debian Edu, I placed both code fragments in a separate script
+edu-eatmydata-install and call it from the pre-pkgsel.d and
+finish-install.d scripts.</p>
+
+<p>By now you might ask if this change should get into the normal
+Debian installer too? I suspect it should, but am not sure the
+current debian-installer coordinators find it useful enough. It also
+depend on the side effects of the change. I'm not aware of any, but I
+guess we will see if the change is safe after some more testing.
+Perhaps there is some package in Debian depending on sync() and
+fsync() having effect? Perhaps it should go into its own udeb, to
+allow those of us wanting to enable it to do so without affecting
+everyone.</p>
+
+<p>Update 2014-09-24: Since a few days ago, enabling this optimization
+will break installation of all programs using gnutls because of
+<ahref="https://bugs.debian.org/702711">bug #702711. An updated
+eatmydata package in Debian will solve it.</p>
</description>
</item>
<item>
- <title>Dugnadsnett for alle, a wireless community network in Oslo, take shape</title>
- <link>http://people.skolelinux.org/pere/blog/Dugnadsnett_for_alle__a_wireless_community_network_in_Oslo__take_shape.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Dugnadsnett_for_alle__a_wireless_community_network_in_Oslo__take_shape.html</guid>
- <pubDate>Sat, 30 Nov 2013 10:10:00 +0100</pubDate>
- <description><p>If you want the ability to electronically communicate directly with
-your neighbors and friends using a network controlled by your peers in
-stead of centrally controlled by a few corporations, or would like to
-experiment with interesting network technology, the
-<a href="http://www.dugnadsnett.no/">Dugnasnett for alle i Oslo</a>
-might be project for you. 39 mesh nodes are currently being planned,
-in the freshly started initiative from NUUG and Hackeriet to create a
-wireless community network. The work is inspired by
-<a href="http://freifunk.net/">Freifunk</a>,
-<a href="http://www.awmn.net/">Athens Wireless Metropolitan
-Network</a>, <a href="http://en.wikipedia.org/wiki/Roofnet">Roofnet</a>
-and other successful mesh networks around the globe. Two days ago we
-held a workshop to try to get people started on setting up their own
-mesh node, and there we decided to create a new mailing list
-<a href="http://lists.nuug.no/mailman/listinfo/dugnadsnett">dugnadsnett
-(at) nuug.no</a> and IRC channel
-<a href="irc://irc.freenode.net/#dugnadsnett.no">#dugnadsnett.no</a> to
-coordinate the work. See also the NUUG blog post
-<a href="http://www.nuug.no/news/E_postliste_og_IRC_kanal_for_Dugnadsnett_for_alle_i_Oslo.shtml">announcing
-the mailing list and IRC channel</a>.</p>
+ <title>Good bye subkeys.pgp.net, welcome pool.sks-keyservers.net</title>
+ <link>http://people.skolelinux.org/pere/blog/Good_bye_subkeys_pgp_net__welcome_pool_sks_keyservers_net.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Good_bye_subkeys_pgp_net__welcome_pool_sks_keyservers_net.html</guid>
+ <pubDate>Wed, 10 Sep 2014 13:10:00 +0200</pubDate>
+ <description><p>Yesterday, I had the pleasure of attending a talk with the
+<a href="http://www.nuug.no/">Norwegian Unix User Group</a> about
+<a href="http://www.nuug.no/aktiviteter/20140909-sks-keyservers/">the
+OpenPGP keyserver pool sks-keyservers.net</a>, and was very happy to
+learn that there is a large set of publicly available key servers to
+use when looking for peoples public key. So far I have used
+subkeys.pgp.net, and some times wwwkeys.nl.pgp.net when the former
+were misbehaving, but those days are ended. The servers I have used
+up until yesterday have been slow and some times unavailable. I hope
+those problems are gone now.</p>
+
+<p>Behind the round robin DNS entry of the
+<a href="https://sks-keyservers.net/">sks-keyservers.net</a> service
+there is a pool of more than 100 keyservers which are checked every
+day to ensure they are well connected and up to date. It must be
+better than what I have used so far. :)</p>
+
+<p>Yesterdays speaker told me that the service is the default
+keyserver provided by the default configuration in GnuPG, but this do
+not seem to be used in Debian. Perhaps it should?</p>
+
+<p>Anyway, I've updated my ~/.gnupg/options file to now include this
+line:</p>
+
+<p><blockquote><pre>
+keyserver pool.sks-keyservers.net
+</pre></blockquote></p>
+
+<p>With GnuPG version 2 one can also locate the keyserver using SRV
+entries in DNS. Just for fun, I did just that at work, so now every
+user of GnuPG at the University of Oslo should find a OpenGPG
+keyserver automatically should their need it:</p>
+
+<p><blockquote><pre>
+% host -t srv _pgpkey-http._tcp.uio.no
+_pgpkey-http._tcp.uio.no has SRV record 0 100 11371 pool.sks-keyservers.net.
+%
+</pre></blockquote></p>
+
+<p>Now if only
+<a href="http://ietfreport.isoc.org/idref/draft-shaw-openpgp-hkp/">the
+HKP lookup protocol</a> supported finding signature paths, I would be
+very happy. It can look up a given key or search for a user ID, but I
+normally do not want that, but to find a trust path from my key to
+another key. Given a user ID or key ID, I would like to find (and
+download) the keys representing a signature path from my key to the
+key in question, to be able to get a trust path between the two keys.
+This is as far as I can tell not possible today. Perhaps something
+for a future version of the protocol?</p>
</description>
</item>
<item>
- <title>Hvor godt fungerer Linux-klienter mot MS Exchange?</title>
- <link>http://people.skolelinux.org/pere/blog/Hvor_godt_fungerer_Linux_klienter_mot_MS_Exchange_.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Hvor_godt_fungerer_Linux_klienter_mot_MS_Exchange_.html</guid>
- <pubDate>Tue, 26 Nov 2013 18:50:00 +0100</pubDate>
- <description><p>Jeg
-<a href="http://people.skolelinux.org/pere/blog/_pent_m_te_p__onsdag_om_bruken_av_Microsoft_Exchange_ved_Universitetet_i_Oslo.html">skrev
-i juni om protestene</a> på planene til min arbeidsplass,
-<a href="http://www.uio.no/">Universitetet i Oslo</a>, om å gå bort fra
-fri programvare- og åpne standardløsninger for å håndtere epost,
-vekk fra IETF-standarden SIEVE for filtrering av epost og over til
-godseide spesifikasjoner og epostsystemet Microsoft Exchange.
-Protestene har fått litt ny omtale i media de siste dagene, i tillegg
-til de oppslagene som kom i mai.</p>
-
-<ul>
-
-<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>
-
-<li>2013-11-25
- <a href="http://www.idg.no/computerworld/article279407.ece">Microsoft-protest
- på Universitetet</a> - Computerworld</li>
-
-<li>2013-11-25
- <a href="http://www.uniforum.uio.no/nyheter/2013/11/uio-bor-bruke-apen-programvare.html">Kjemper
- mot innføring av Microsoft Exchange på UiO</a> - Uniforum</li>
+ <title>Do you need an agreement with MPEG-LA to publish and broadcast H.264 video in Norway?</title>
+ <link>http://people.skolelinux.org/pere/blog/Do_you_need_an_agreement_with_MPEG_LA_to_publish_and_broadcast_H_264_video_in_Norway_.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Do_you_need_an_agreement_with_MPEG_LA_to_publish_and_broadcast_H_264_video_in_Norway_.html</guid>
+ <pubDate>Mon, 25 Aug 2014 22:10:00 +0200</pubDate>
+ <description><p>Two years later, I am still not sure if it is legal here in Norway
+to use or publish a video in H.264 or MPEG4 format edited by the
+commercially licensed video editors, without limiting the use to
+create "personal" or "non-commercial" videos or get a license
+agreement with <a href="http://www.mpegla.com">MPEG LA</a>. If one
+want to publish and broadcast video in a non-personal or commercial
+setting, it might be that those tools can not be used, or that video
+format can not be used, without breaking their copyright license. I
+am not sure.
+<a href="http://people.skolelinux.org/pere/blog/Trenger_en_avtale_med_MPEG_LA_for___publisere_og_kringkaste_H_264_video_.html">Back
+then</a>, I found that the copyright license terms for Adobe Premiere
+and Apple Final Cut Pro both specified that one could not use the
+program to produce anything else without a patent license from MPEG
+LA. The issue is not limited to those two products, though. Other
+much used products like those from Avid and Sorenson Media have terms
+of use are similar to those from Adobe and Apple. The complicating
+factor making me unsure if those terms have effect in Norway or not is
+that the patents in question are not valid in Norway, but copyright
+licenses are.</p>
+
+<p>These are the terms for Avid Artist Suite, according to their
+<a href="http://www.avid.com/US/about-avid/legal-notices/legal-enduserlicense2">published
+end user</a>
+<a href="http://www.avid.com/static/resources/common/documents/corporate/LICENSE.pdf">license
+text</a> (converted to lower case text for easier reading):</p>
+
+<p><blockquote>
+<p>18.2. MPEG-4. MPEG-4 technology may be included with the
+software. MPEG LA, L.L.C. requires this notice: </p>
+
+<p>This product is licensed under the MPEG-4 visual patent portfolio
+license for the personal and non-commercial use of a consumer for (i)
+encoding video in compliance with the MPEG-4 visual standard (“MPEG-4
+video”) and/or (ii) decoding MPEG-4 video that was encoded by a
+consumer engaged in a personal and non-commercial activity and/or was
+obtained from a video provider licensed by MPEG LA to provide MPEG-4
+video. No license is granted or shall be implied for any other
+use. Additional information including that relating to promotional,
+internal and commercial uses and licensing may be obtained from MPEG
+LA, LLC. See http://www.mpegla.com. This product is licensed under
+the MPEG-4 systems patent portfolio license for encoding in compliance
+with the MPEG-4 systems standard, except that an additional license
+and payment of royalties are necessary for encoding in connection with
+(i) data stored or replicated in physical media which is paid for on a
+title by title basis and/or (ii) data which is paid for on a title by
+title basis and is transmitted to an end user for permanent storage
+and/or use, such additional license may be obtained from MPEG LA,
+LLC. See http://www.mpegla.com for additional details.</p>
+
+<p>18.3. H.264/AVC. H.264/AVC technology may be included with the
+software. MPEG LA, L.L.C. requires this notice:</p>
+
+<p>This product is licensed under the AVC patent portfolio license for
+the personal use of a consumer or other uses in which it does not
+receive remuneration to (i) encode video in compliance with the AVC
+standard (“AVC video”) and/or (ii) decode AVC video that was encoded
+by a consumer engaged in a personal activity and/or was obtained from
+a video provider licensed to provide AVC video. No license is granted
+or shall be implied for any other use. Additional information may be
+obtained from MPEG LA, L.L.C. See http://www.mpegla.com.</p>
+</blockquote></p>
+
+<p>Note the requirement that the videos created can only be used for
+personal or non-commercial purposes.</p>
+
+<p>The Sorenson Media software have
+<a href="http://www.sorensonmedia.com/terms/">similar terms</a>:</p>
+
+<p><blockquote>
+
+<p>With respect to a license from Sorenson pertaining to MPEG-4 Video
+Decoders and/or Encoders: Any such product is licensed under the
+MPEG-4 visual patent portfolio license for the personal and
+non-commercial use of a consumer for (i) encoding video in compliance
+with the MPEG-4 visual standard (“MPEG-4 video”) and/or (ii) decoding
+MPEG-4 video that was encoded by a consumer engaged in a personal and
+non-commercial activity and/or was obtained from a video provider
+licensed by MPEG LA to provide MPEG-4 video. No license is granted or
+shall be implied for any other use. Additional information including
+that relating to promotional, internal and commercial uses and
+licensing may be obtained from MPEG LA, LLC. See
+http://www.mpegla.com.</p>
+
+<p>With respect to a license from Sorenson pertaining to MPEG-4
+Consumer Recorded Data Encoder, MPEG-4 Systems Internet Data Encoder,
+MPEG-4 Mobile Data Encoder, and/or MPEG-4 Unique Use Encoder: Any such
+product is licensed under the MPEG-4 systems patent portfolio license
+for encoding in compliance with the MPEG-4 systems standard, except
+that an additional license and payment of royalties are necessary for
+encoding in connection with (i) data stored or replicated in physical
+media which is paid for on a title by title basis and/or (ii) data
+which is paid for on a title by title basis and is transmitted to an
+end user for permanent storage and/or use. Such additional license may
+be obtained from MPEG LA, LLC. See http://www.mpegla.com for
+additional details.</p>
+
+</blockquote></p>
+
+<p>Some free software like
+<a href="https://handbrake.fr/">Handbrake</A> and
+<a href="http://ffmpeg.org/">FFMPEG</a> uses GPL/LGPL licenses and do
+not have any such terms included, so for those, there is no
+requirement to limit the use to personal and non-commercial.</p>
+</description>
+ </item>
+
+ <item>
+ <title>Lenker for 2014-08-03</title>
+ <link>http://people.skolelinux.org/pere/blog/Lenker_for_2014_08_03.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Lenker_for_2014_08_03.html</guid>
+ <pubDate>Sun, 3 Aug 2014 23:00:00 +0200</pubDate>
+ <description><p>Lenge siden jeg har hatt tid til å publisere lenker til skriverier
+jeg har hatt glede og nytte av av å lese. Her er en liten norsk
+lenkesamling.</p>
+
+<p><ul>
+
+<li><a href="http://www.nrk.no/ytring/sjoslag-om-fiskemilliardene-1.11576109">Sjøslag
+om fiskemilliardene</a> (NRK Ytring 2014-03-03) - litt om hvordan de
+norske felles matressurser røves fra felleskapet.</li>
+
+<li><a href="http://www.aftenposten.no/nyheter/Matkrisen-kan-komme-til-Norge-7522341.html">Matkrisen
+kan komme til Norge</a> (Aftenposten 2014-4-01) - hvordan miljøendringene vil gjøre matproduksjonen i Norge mer sårbar.</li>
+
+<li><a href="http://www.nrk.no/ytring/norge-trenger-kornlager-1.11726744">Norge
+trenger kornlager</a> (NRK Ytring 2014-06-07) Chr. Anton Smedshaug
+forteller litt om Norges sårbare matsituasjon etter at Staten solgte
+Norges kornlager.</li>
+
+<li><a href="http://www.nrk.no/norge/pst-vil-overvake-datatastaturer-1.11583286">PST
+vil overvåke datatastaturer</a> (NRK 2014-03-04) - PST ønsker retten
+til å bryte seg inn på private PC-er og legge inn spionprogrammer.
+Hvilket nok vil gjøre Linux mer populært, men gjør at en i enda mindre
+grad enn i dag kan stole på datamaskiner - neppe en god ide for
+samfunnet totalt sett.</li>
+
+<li><a href="http://www.osloby.no/nyheter/Ruter-fremstar-som-et-pobelvelde-7490624.html">«Ruter
+fremstår som et pøbelvelde»</a> (OsloBy 2014-03-05) - et eksempel på
+hvordan kollektivtransportselskapet i Oslo håndterer sine kunder.</li>
+
+<li><a href="http://www.dagbladet.no/2014/03/05/nyheter/dbtv/reklame/clear_channel/32123808/">Clear
+Channel nektet å vise Greenpeace-reklame i Oslo</a> (Dagbladet
+2014-03-05) - forteller litt om hvordan hvilke budskap som når ut i
+det offentlige rom kontrolleres i Norge.</li>
+
+<li><a href="http://www.dagbladet.no/2014/03/06/kultur/meninger/debattinnlegg/kronikk/22_juli/32175854/">Svarte
+ikke på kritikken</a> (Dagbladet 2014-03-06) - innlegg fra Norsk
+presseforbund der de nok en gang tar opp det forkastelige i at
+politiet nå har full tilgang til å bedrive telefonkontroll av
+advokater.</li>
+
+<li><a href="http://www.aftenposten.no/nyheter/uriks/Putin-spiller-poker_-ikke-sjakk-I-sjakk-har-man-regler-7495368.html">«Putin
+spiller poker, ikke sjakk. I sjakk har man regler.»</a> (Aftenposten
+2014-03-08) - sjakklegenden Kasparov forklarer litt om hvordan han ser
+at Russlands politikk fungerer, blant annet i lys av started av
+Ukraina-krisen.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/kronikker/I-seng-med-fienden-7492605.html">I
+seng med fienden</a> (Aftenposten 2014-03-10) - kronikk fra Eirik
+H. Vinje om hvordan menn og kvinner settes opp mot hverandre i det
+offentlige ordskiftet, kanskje på sviktende grunnlag.</li>
+
+<li><a href="http://www.aftenposten.no/amagasinet/Hvor-er-elevene-7501690.html">Fritt
+frem for skulk</a> (Aftenposten 2014-03-14) - skildring av hvordan
+norske elever i dag ikke lenger har rimelig krav om oppmøte på
+skolen.</li>
+
+<li><a href="http://www.aftenposten.no/digital/Datalagringsdirektiv-avslorte-abort_-sykdom-og-vapenkjop--7503014.html">«Datalagringsdirektiv»
+avslørte abort, sykdom og våpenkjøp</a> (Aftenposten 2014-03-14) - om
+hvordan forskere har dokumentert hvordan innsamling av metadata om
+telefoni og Internett-bruk kan være svært avslørende.</li>
+
+<li><a href="http://www.dagbladet.no/2014/03/14/kultur/meninger/ideer/lordagskommentaren/agnes_ravatn/32302856/">Konsentrasjonssvikt
+på pensum</a> (Dagbladet 2014-03-14) - Kommentar om hvordan (feil)
+bruk IKT i skolen kan ødelegge mer enn det bidrar til læring.</li>
+
+<li><a href="http://doremusnor.wordpress.com/2014/02/09/reservasjonsrettsstaten/">Reservasjonsrettsstaten</a>
+(blogg fra Doremus 2014-02-09) - morsom beskrivelse om hvordan
+regjeringens forslag til reservasjonsrett for leger kan utvides til å
+gjelde alles samvittighet.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/kronikker/Autoritar-gjokunge-7514915.html">Autoritær
+gjøkunge</a> (Aftenposten 2014-03-25) - Kronikk av Bjørn Stærk om
+snurpenots-overvåkningen som varsleren Snowden dokumenterte.</li>
+
+<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
+i Offentlig sektor – mener Mike Bracken, Executive Director of Digital
+in the Cabinet Office</a> (blogg fra Friprog-senteret 2014-03-26).</li>
+
+<li><a href="http://www.dagbladet.no/2014/03/26/kultur/meninger/kronikk/etiopia/avlytting/32499687/">Norge
+må stanse avlyttingen</a> (Dagbladet 2014-03-26) - leserinnlegg fra
+Felix Horne der han ber om at Norge gjør en innsats for å få slutt på
+overvåkning av innbyggerne som gjøres i Norge av Etiopiske
+myndigheter.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/kronikker/Demokrati-er-ingen-naturlig-styreform-7521957.html">Demokrati
+er ingen naturlig styreform</a> (Aftenposten 2014-04-01) - kronikk av
+Stein Ringen om hvordan demokrati som styreform går tapt når
+innbyggerne tar det for gitt.</li>
+
+<li><a href="http://www.nrk.no/ytring/ytringsansvar-ere-enhver-tilladte_-1.11618934">Ytringsansvar
+ere Enhver tilladte!</a> (NRK Ytring 2014-04-01) - innspill fra Trygve
+Svensson og Helge Svare om at hver enkelt av oss har et ansvar for å
+ytre oss i den offentlige debatten.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/Jeg-er-ingen-god-samfunnsborger-7527128.html">Jeg
+er ingen god samfunnsborger</a> (Aftenposten 2014-04-16), kronikk av
+Simen Tveitereid om alternative måter å motiveres i samfunnet, uten å
+hige etter mer penger og flere ting.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/debatt/Avgjorelsen-far-umiddelbar-virkning-7531811.html">DLD-dommen:
+Avgjørelsen får umiddelbar virkning</a> (Aftenposten 2014-04-10) -
+kronikk av Høyres Michael Tetzschner, en partiutbryter i DLD-saken som
+stemte nei til DLD i Stortinget i 2011.</li>
+
+<li><a href="http://www.uhuru.biz/?p=1466">Datalagringsdirektivets
+endelikt</a> (blogg fra John Wessel-Aas 2014-04-11) - oppsummering
+av hvordan direktivet ble funnet ugyldig i EU-domstolen.</li>
+
+<li><a href="http://www.vg.no/nyheter/meninger/kronikk-kapitulasjonspresidenten/a/10147713/">Kronikk:
+Kapitulasjonspresidenten</a> (VG 2014-04-22) - kronikk av Einar
+Kr. Steffenak om hvordan Stortingspresidenten og regjeringen viser sin
+prinsippløshet i møte med Kina.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/kronikker/Innerst-inne-er-alle-nordmenn-7542617.html">Innerst
+inne er alle nordmenn</a> (Aftenposten 2014-04-27) - kronikk fra Bjørn
+Stærk om hvordan vi i Vesten i stor grad baserer oss på en fantasi om
+at alle i verden bærer på en drøm om å bli som oss.</li>
+
+<li><a href="http://www.aftenposten.no/viten/uviten/Det-italienske-senatet-gav-seg-selv-134-milliarder-euro-i-sluttpakke--7575312.html">Det
+italienske senatet gav seg selv 134 milliarder euro i sluttpakke</a>
+(Aftenposten 2014-06-19) - forsker Simen Gaure forteller hvordan
+løgner og fantasi fra nettkilder i stor grad blir akseptert som
+sannhet - antagelig også av deg og meg.</li>
+
+<li><a href="http://www.dagbladet.no/2014/05/30/kultur/meninger/kronikk/skole/33576392/">Et
+forsvar for bråkmakerne</a> (Dagbladet 2014-05-30) - kronikk av Dag
+Øystein Nome som beskriver hvordan dagens skole ikke fungerer så godt
+for mange elever.</li>
+
+<li><a href="http://www.osloby.no/nyheter/Betalte-med-slitt-seddel---havnet-i-arresten-7617208.html">Betalte
+med slitt seddel - havnet i arresten</a> (Osloby 2014-06-25)) -
+dokumentasjon av Oslopolitiets angrep på vår alles rett til å ferdes
+uten elektronisk sporing. Jeg bruker kontanter i så stor grad som
+mulig da banken ikke har noe med hvor jeg er og hva jeg kjøper. Vi
+som gjør dette risikerer som beskrevet overgrep som frihetsberøvelse
+og registrering og lagring av fingeravtrykk og bilde i politiets
+database over mistenkte.</li>
+
+<li><a href="http://www.aftenposten.no/meninger/leder/Fredsprisen-til-Snowden-7620422.html">Fredsprisen
+til Snowden</a> (Aftenposten 2014-06-28) - leder som forklarer hvorfor
+varsleren Snowden bør få fredsprisen.</li>
+
+<li><a href="http://www.dagbladet.no/2014/08/01/kultur/meninger/dbmener/leder1/34598010/">Strategi
+for politistaten</a> (Dagbladet 2014-08-01) - leder som advarer om
+sterke krefter som bruker terrortrusselen til å lirke Norge nærmere å
+bli en politistat.</li>
+
+<li><a href="http://www.nrk.no/ytring/vi-ma-tenke-nytt-om-narkotika-1.11859322">Vi
+må tenke nytt om narkotika</a> (NRK Ytring 2014-08-03) - Mark Lewis
+forklarer hvorfor legalisering og offentlig kontroll av
+narkotikamarkedet er mye bedre enn å overlate det til kriminelle.</li>
+
+
+</ul></p>
+</description>
+ </item>
+
+ <item>
+ <title>Debian Edu interview: Bernd Zeitzen</title>
+ <link>http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Bernd_Zeitzen.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Bernd_Zeitzen.html</guid>
+ <pubDate>Thu, 31 Jul 2014 08:30:00 +0200</pubDate>
+ <description><p>The complete and free “out of the box” software solution for
+schools, <a href="http://www.skolelinux.org/">Debian Edu /
+Skolelinux</a>, is used quite a lot in Germany, and one of the people
+involved is Bernd Zeitzen, who show up on the project mailing lists
+from time to time with interesting questions and tips on how to adjust
+the setup. I managed to interview him this summer.</p>
-<li>2013-11-25
- <a href="http://www.uniforum.uio.no/nyheter/2013/11/uio-utsetter-innforing-av-nytt-e-postsystem.html">Utsetter
- innføring av nytt e-postsystem</a> - Uniforum</li>
+<p><strong>Who are you, and how do you spend your days?</strong></p>
-<li>2013-05-29
- <a href="http://universitas.no/nyhet/58462/forsvarer-nytt-it-system">Forsvarer
- nytt IT-system</a> - Universitas</li>
+<p>My name is Bernd Zeitzen and I'm married with Hedda, a self
+employed physiotherapist. My former profession is tool maker, but I
+haven't worked for 30 years in this job. 30 years ago I started to
+support my wife and become her officeworker and a few years later the
+administrator for a small computer network, today based on Ubuntu
+Server (Samba, OpenVPN). For her daily work she has to use Windows
+Desktops because the software she needs to organize her business only
+works with Windows . :-(</p>
+
+<p>In 1988 we started with one PC and DOS, then I learned to use
+Windows 98, 2000, XP, …, 8, Ubuntu, MacOSX. Today we are running a
+Linux server with 6 Windows clients and 10 persons (teacher of
+children with special needs, speech therapist, occupational therapist,
+psychologist and officeworkers) using our Samba shares via OpenVPN to
+work with the documentations of our patients.</p>
-<li>2013-05-23
- <a href="http://www.uniforum.uio.no/nyheter/2013/05/uio-innforer-nytt-epost-og-kalendersystem.html">UiO
- innfører nytt epost- og kalenderverktøy</a> - Uniforum</li>
+<p><strong>How did you get in contact with the Skolelinux / Debian Edu
+project?</strong></p>
-<li>2013-05-22
- <a href="http://universitas.no/nyhet/58424/protestgruppe-vil-stanse-it-system">Protestgruppe
- vil stanse IT-system</a> - Universitas</li>
+<p>Two years ago a friend of mine asked me, if I want to get a job in
+his school (<a href="http://www.gymnasium-harsewinkel.de/">Gymnasium
+Harsewinkel</a>). They started with Skolelinux / Debian Edu and they
+were looking for people to give support to the teachers using the
+software and the network and teaching the pupils increasing their
+computer skills in optional lessons. I'm spending 4-6 hours a week
+with this job.</p>
-<li>2013-05-15
- <a href="http://www.uniforum.uio.no/leserbrev/2013/uio-ma-ha-kontroll-over-sitt-eget-epostsystem.html">UiO
- må ha kontroll over sitt eget epostsystem</a> - Uniforum</li>
+<p><strong>What do you see as the advantages of Skolelinux / Debian
+Edu?</strong></p>
-</ul>
+<p>The independence.</p>
-<p>Prosjektledelsen har fortalt at dette skal fungere like godt for
-Linux-brukere som for brukere av Microsoft Windows og Apple MacOSX,
-men jeg lurer på hva slags erfaringer Linux-brukere i eksisterende
-miljøer som bruker MS Exchange har gjort. Hvis du har slik erfaring
-hadet det vært veldig fint om du kan send et leserbrev til
-<a href="http://www.uniforum.uio.no/">Uniforum</a> og fortelle om hvor
-greit det er å bruke Exchange i kryss-platform-miljøer? De jeg har
-snakket med sier en greit får lest e-posten sin hvis Exchange har
-slått på IMAP-funksjonalitet, men at kalender og møtebooking ikke
-fungerer godt for Linux-klienter. Jeg har ingen personlig erfaring å
-komme med, så jeg er nysgjerrig på hva andre kan dele av erfaringer
-med universitetet.</p>
-
-<p>Mitt ankerpunkt mot å bytte ut fri programvare som fungerer godt
-med godseid programvare er at en mister kontroll over egen
-infrastruktur, låser seg inn i en løsning det vil bli dyrt å komme ut
-av, uten at en får funksjonalitet en ikke kunne skaffet seg med fri
-programvare, eventuelt videreutviklet med de pengene som brukes på
-overgangen til MS Exchange. Personlig planlegger jeg å fortsette å
-laste ned all eposten min til lokal maskin for indeksering og lesing
-med <a href=="http://notmuchmail.org">notmuch</a>, så jeg håper jeg
-ikke blir veldig skadelidende av overgangen.</p>
-
-<p><a href="http://dinis.linguateca.pt/Diana/ImotMSUiO.html">Underskriftslista
-for oss som er mot endringen</a>, som omtales i artiklene, er fortsatt
-åpen for de som vil signere på oppropet. Akkurat nå er det 298
-personer som har signert.</p>
-</description>
- </item>
-
- <item>
- <title>New chrpath release 0.15</title>
- <link>http://people.skolelinux.org/pere/blog/New_chrpath_release_0_15.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/New_chrpath_release_0_15.html</guid>
- <pubDate>Sun, 24 Nov 2013 09:30:00 +0100</pubDate>
- <description><p>After many years break from the package and a vain hope that
-development would be continued by someone else, I finally pulled my
-acts together this morning and wrapped up a new release of chrpath,
-the command line tool to modify the rpath and runpath of already
-compiled ELF programs. The update was triggered by the persistence of
-Isha Vishnoi at IBM, which needed a new config.guess file to get
-support for the ppc64le architecture (powerpc 64-bit Little Endian) he
-is working on. I checked the
-<a href="http://packages.qa.debian.org/chrpath">Debian</a>,
-<a href="https://launchpad.net/ubuntu/+source/chrpath">Ubuntu</a> and
-<a href="https://admin.fedoraproject.org/pkgdb/acls/name/chrpath">Fedora</a>
-packages for interesting patches (failed to find the source from
-OpenSUSE and Mandriva packages), and found quite a few nice fixes.
-These are the release notes:</p>
-
-<p>New in 0.15 released 2013-11-24:</p>
+<p>First: Every person is allowed to use, share and develop the
+software. Even if you are poor, you are allowed to use the software
+included in Skolelinux/Debian Edu and all the other Free Software.</p>
-<ul>
+<p>Second: The software runs on old machines and this gives us the
+possibility to recycle computers, weeded out from offices. The
+servers and desktops are running for more than two years and they are
+working reliable. </p>
- <li>Updated config.sub and config.guess from the GNU project to work
- with newer architectures. Thanks to isha vishnoi for the heads
- up.</li>
+<p>We have two servers (one tjener and one terminal server), 45
+workstations in three classrooms and seven laptops as a mobile
+solution for all classrooms. These machines are all booting from the
+terminal server. In the moment we are installing 30 laptops as mobile
+workstations. Then the pupils have the possibility to work with these
+machines in their classrooms. Internet access is realized by a WLAN
+router, connected to the schools network. This is all done without a
+dedicated system administrator or a computer science teacher.</p>
- <li>Updated README with current URLs.</li>
+<p><strong>What do you see as the disadvantages of Skolelinux / Debian
+Edu?</strong></p>
- <li>Added byteswap fix found in Ubuntu, credited Jeremy Kerr and
- Matthias Klose.</li>
+<p>Teachers and pupils are Windows users. &lt;Irony on&gt; And Linux
+isn't cool. It's software for freaks using the command line. &lt;Irony
+off&gt; They don't realize the stability of the system. </p>
- <li>Added missing help for -k|--keepgoing option, using patch by
- Petr Machata found in Fedora.</li>
+<p><strong>Which free software do you use daily?</strong></p>
- <li>Rewrite removal of RPATH/RUNPATH to make sure the entry in
- .dynamic is a NULL terminated string. Based on patch found in
- Fedora credited Axel Thimm and Christian Krause.</li>
+<p>Firefox, Thunderbird, LibreOffice, Ubuntu Server 12.04 (Samba,
+Apache, MySQL, Joomla!, … and Skolelinux / Debian Edu)</p>
-</ul>
+<p><strong>Which strategy do you believe is the right one to use to
+get schools to use free software?</strong></p>
-<p>You can
-<a href="https://alioth.debian.org/frs/?group_id=31052">download the
-new version 0.15 from alioth</a>. Please let us know via the Alioth
-project if something is wrong with the new release. The test suite
-did not discover any old errors, so if you find a new one, please also
-include a testsuite check.</p>
-</description>
- </item>
-
- <item>
- <title>RSS-kilde for fritekstsøk i offentlige anbud hos Doffin</title>
- <link>http://people.skolelinux.org/pere/blog/RSS_kilde_for_friteksts_k_i_offentlige_anbud_hos_Doffin.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/RSS_kilde_for_friteksts_k_i_offentlige_anbud_hos_Doffin.html</guid>
- <pubDate>Fri, 22 Nov 2013 13:40:00 +0100</pubDate>
- <description><p>I fjor sommer lagde jeg en
-<a href="http://people.skolelinux.org/pere/blog/SQL_database_med_anbud_publisert_p__Doffin.html">offentlig
-tilgjengelig SQL-database over offentlig anbud</a> basert på skraping
-av HTML-data fra Doffin. Den har stått og gått siden da, og har nå
-ca. 28000 oppføringer. Jeg oppdaget da jeg tittet innom at noen
-oppføringer var ikke blitt med, antagelig på grunn av at de fikk
-tildelt sekvensnummer i Doffin en godt stund før de ble publisert,
-slik at min nettsideskraper som fortsatte skrapingen der den slapp
-sist ikke fikk dem med seg. Jeg har fikset litt slik at skraperen nå
-ser litt tilbake i tid for å se om den har gått glipp av noen
-oppføringer, og har skrapet på nytt fra midten av september 2013 og
-fremover. Det bør dermed bli en mer komplett database for kommende
-måneder. Hvis jeg får tid skal jeg forsøke å skrape "glemte" data fra
-før midten av september 2013, men tør ikke garantere at det blir
-prioritert med det første. </p>
-
-<p>Men målet med denne bloggposten er å vise hvordan denne
-Doffin-databasen kan brukes og integreres med en RSS-leser, slik at en
-kan la datamaskinen holde et øye med Doffin-annonseringer etter
-nøkkelord. En kan lage sitt eget søk ved å besøke
-<ahref="https://classic.scraperwiki.com/docs/api?name=norwegian-doffin#sqlite">API-et
-hos Scraperwiki</a>, velge format rss2 og så legge inn noe ala dette i
-"query in SQL":</p>
-
-<p><pre>
-select title, scrapedurl as link, abstract as description,
- publishdate as pubDate from 'swdata'
- where abstract like '%linux%' or title like '%linux%'
- order by seq desc limit 20
-</pre></p>
-
-<p>Dette vil søke opp alle anbud med ordet linux i oppsummering eller
-tittel. En kan lage mer avanserte søk hvis en ønsker det. URL-en som
-dukker opp nederst på siden kan en så gi til sin RSS-leser (jeg bruker
-akregator selv), og så automatisk få beskjed hvis det dukker opp anbud
-med det aktuelle nøkkelordet i teksten. Merk at kapasiteten og
-ytelsen hos Scraperwiki er begrenset, så ikke be RSS-leseren hente ned
-oftere enn en gang hver dag.</p>
-
-<p>Du lurer kanskje på hva slags informasjon en kan få ut fra denne
-databasen. Her er to RSS-kilder, med søkeordet
-"<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>",
-søkeordet
-"<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
-programvare</a>"
-og søkeordet
-"<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>".
-Det er bare å søke på det en er interessert i. Kopier gjerne
-datasettet og sett opp din egen tjeneste hvis du vil gjøre mer
-avanserte søk. SQLite-filen med Doffin-oppføringer kan lastes med fra
-Scraperwiki for de som vil grave dypere.</p>
+<p>In Germany we have the situation: every school is free to decide
+which software they want to use. This decision is influenced by
+teachers who learned to use Windows and MS Office. They buy a PC with
+Windows preinstalled and an additional testing version of MS
+Office. They don't know about the possibility to use Free Software
+instead. Another problem are the publisher of school books. They
+develop their software, added to the school books, for Windows.</p>
</description>
</item>
<item>
- <title>All drones should be radio marked with what they do and who they belong to</title>
- <link>http://people.skolelinux.org/pere/blog/All_drones_should_be_radio_marked_with_what_they_do_and_who_they_belong_to.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/All_drones_should_be_radio_marked_with_what_they_do_and_who_they_belong_to.html</guid>
- <pubDate>Thu, 21 Nov 2013 15:40:00 +0100</pubDate>
- <description><p>Drones, flying robots, are getting more and more popular. The most
-know ones are the killer drones used by some government to murder
-people they do not like without giving them the chance of a fair
-trial, but the technology have many good uses too, from mapping and
-forest maintenance to photography and search and rescue. I am sure it
-is just a question of time before "bad drones" are in the hands of
-private enterprises and not only state criminals but petty criminals
-too. The drone technology is very useful and very dangerous. To have
-some control over the use of drones, I agree with Daniel Suarez in his
-TED talk
-"<a href="https://archive.org/details/DanielSuarez_2013G">The kill
-decision shouldn't belong to a robot</a>", where he suggested this
-little gem to keep the good while limiting the bad use of drones:</p>
-
-<blockquote>
-
-<p>Each robot and drone should have a cryptographically signed
-I.D. burned in at the factory that can be used to track its movement
-through public spaces. We have license plates on cars, tail numbers on
-aircraft. This is no different. And every citizen should be able to
-download an app that shows the population of drones and autonomous
-vehicles moving through public spaces around them, both right now and
-historically. And civic leaders should deploy sensors and civic drones
-to detect rogue drones, and instead of sending killer drones of their
-own up to shoot them down, they should notify humans to their
-presence. And in certain very high-security areas, perhaps civic
-drones would snare them and drag them off to a bomb disposal facility.</p>
-
-<p>But notice, this is more an immune system than a weapons system. It
-would allow us to avail ourselves of the use of autonomous vehicles
-and drones while still preserving our open, civil society.</p>
-
-</blockquote>
-
-<p>The key is that <em>every citizen</em> should be able to read the
-radio beacons sent from the drones in the area, to be able to check
-both the government and others use of drones. For such control to be
-effective, everyone must be able to do it. What should such beacon
-contain? At least formal owner, purpose, contact information and GPS
-location. Probably also the origin and target position of the current
-flight. And perhaps some registration number to be able to look up
-the drone in a central database tracking their movement. Robots
-should not have privacy. It is people who need privacy.</p>
+ <title>98.6 percent done with the Norwegian draft translation of Free Culture</title>
+ <link>http://people.skolelinux.org/pere/blog/98_6_percent_done_with_the_Norwegian_draft_translation_of_Free_Culture.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/98_6_percent_done_with_the_Norwegian_draft_translation_of_Free_Culture.html</guid>
+ <pubDate>Wed, 23 Jul 2014 22:40:00 +0200</pubDate>
+ <description><p>This summer I finally had time to continue working on the Norwegian
+<a href="http://www.docbook.org/">docbook</a> version of the 2004 book
+<a href="http://free-culture.cc/">Free Culture</a> by Lawrence Lessig,
+to get a Norwegian text explaining the problems with todays copyright
+law. Yesterday, I finally completed translated the book text. There
+are still some foot/end notes left to translate, the colophon page
+need to be rewritten, and a few words and phrases still need to be
+translated, but the Norwegian text is ready for the first proof
+reading. :) More spell checking is needed, and several illustrations
+need to be cleaned up. The work stopped up because I had to give
+priority to other projects the last year, and the progress graph of
+the translation show this very well:</p>
+
+<p><img width="80%" align="center" src="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/progress.png"></p>
+
+<p>If you want to read the result, check out the
+<a href="https://github.com/petterreinholdtsen/free-culture-lessig">github</a>
+project pages and the
+<a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.pdf?raw=true">PDF</a>,
+<a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.epub?raw=true">EPUB</a>
+and HTML version available in the
+<a href="https://github.com/petterreinholdtsen/free-culture-lessig/tree/master/archive">archive
+directory</a>.</p>
+
+<p>Please report typos, bugs and improvements to the github project if
+you find any.</p>
</description>
</item>
<item>
- <title>Lets make a wireless community network in Oslo!</title>
- <link>http://people.skolelinux.org/pere/blog/Lets_make_a_wireless_community_network_in_Oslo_.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Lets_make_a_wireless_community_network_in_Oslo_.html</guid>
- <pubDate>Wed, 13 Nov 2013 21:00:00 +0100</pubDate>
- <description><p>Today NUUG and Hackeriet announced
-<a href="http://www.nuug.no/news/Bli_med___bygge_dugnadsnett_for_alle_i_Oslo.shtml">our
-plans to join forces and create a wireless community network in
-Oslo</a>. The workshop to help people get started will take place
-Thursday 2013-11-28, but we already are collecting the geolocation of
-people joining forces to make this happen. We have
-<a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/oslo-nodes.geojson">9
-locations plotted on the map</a>, but we will need more before we have
-a connected mesh spread across Oslo. If this sound interesting to
-you, please join us at the workshop. If you are too impatient to wait
-15 days, please join us on the IRC channel
-<a href="irc://irc.freenode.net/%23nuug">#nuug on irc.freenode.net</a>
-right away. :)</p>
+ <title>From English wiki to translated PDF and epub via Docbook</title>
+ <link>http://people.skolelinux.org/pere/blog/From_English_wiki_to_translated_PDF_and_epub_via_Docbook.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/From_English_wiki_to_translated_PDF_and_epub_via_Docbook.html</guid>
+ <pubDate>Tue, 17 Jun 2014 11:30:00 +0200</pubDate>
+ <description><p>The <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux
+project</a> provide an instruction manual for teachers, system
+administrators and other users that contain useful tips for setting up
+and maintaining a Debian Edu installation. This text is about how the
+text processing of this manual is handled in the project.</p>
+
+<p>One goal of the project is to provide information in the native
+language of its users, and for this we need to handle translations.
+But we also want to make sure each language contain the same
+information, so for this we need a good way to keep the translations
+in sync. And we want it to be easy for our users to improve the
+documentation, avoiding the need to learn special formats or tools to
+contribute, and the obvious way to do this is to make it possible to
+edit the documentation using a web browser. We also want it to be
+easy for translators to keep the translation up to date, and give them
+help in figuring out what need to be translated. Here is the list of
+tools and the process we have found trying to reach all these
+goals.</p>
+
+<p>We maintain the authoritative source of our manual in the
+<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">Debian
+wiki</a>, as several wiki pages written in English. It consist of one
+front page with references to the different chapters, several pages
+for each chapter, and finally one "collection page" gluing all the
+chapters together into one large web page (aka
+<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/AllInOne">the
+AllInOne page</a>). The AllInOne page is the one used for further
+processing and translations. Thanks to the fact that the
+<a href="http://moinmo.in/">MoinMoin</a> installation on
+wiki.debian.org support exporting pages in
+<a href="http://www.docbook.org/">the Docbook format</a>, we can fetch
+the list of pages to export using the raw version of the AllInOne
+page, loop over each of them to generate a Docbook XML version of the
+manual. This process also download images and transform image
+references to use the locally downloaded images. The generated
+Docbook XML files are slightly broken, so some post-processing is done
+using the <tt>documentation/scripts/get_manual</tt> program, and the
+result is a nice Docbook XML file (debian-edu-wheezy-manual.xml) and
+a handfull of images. The XML file can now be used to generate PDF, HTML
+and epub versions of the English manual. This is the basic step of
+our process, making PDF (using dblatex), HTML (using xsltproc) and
+epub (using dbtoepub) version from Docbook XML, and the resulting files
+are placed in the debian-edu-doc-en binary package.</p>
+
+<p>But English documentation is not enough for us. We want translated
+documentation too, and we want to make it easy for translators to
+track the English original. For this we use the
+<a href="http://packages.qa.debian.org/p/poxml.html">poxml</a> package,
+which allow us to transform the English Docbook XML file into a
+translation file (a .pot file), usable with the normal gettext based
+translation tools used by those translating free software. The pot
+file is used to create and maintain translation files (several .po
+files), which the translations update with the native language
+translations of all titles, paragraphs and blocks of text in the
+original. The next step is combining the original English Docbook XML
+and the translation file (say debian-edu-wheezy-manual.nb.po), to
+create a translated Docbook XML file (in this case
+debian-edu-wheezy-manual.nb.xml). This translated (or partly
+translated, if the translation is not complete) Docbook XML file can
+then be used like the original to create a PDF, HTML and epub version
+of the documentation.</p>
+
+<p>The translators use different tools to edit the .po files. We
+recommend using
+<a href="http://www.kde.org/applications/development/lokalize/">lokalize</a>,
+while some use emacs and vi, others can use web based editors like
+<a href="http://pootle.translatehouse.org/">Poodle</a> or
+<a href="https://www.transifex.com/">Transifex</a>. All we care about
+is where the .po file end up, in our git repository. Updated
+translations can either be committed directly to git, or submitted as
+<a href="https://bugs.debian.org/src:debian-edu-doc">bug reports
+against the debian-edu-doc package</a>.</p>
+
+<p>One challenge is images, which both might need to be translated (if
+they show translated user applications), and are needed in different
+formats when creating PDF and HTML versions (epub is a HTML version in
+this regard). For this we transform the original PNG images to the
+needed density and format during build, and have a way to provide
+translated images by storing translated versions in
+images/$LANGUAGECODE/. I am a bit unsure about the details here. The
+package maintainers know more.</p>
+
+<p>If you wonder what the result look like, we provide
+<a href="http://maintainer.skolelinux.org/debian-edu-doc/">the content
+of the documentation packages on the web</a>. See for example the
+<a href="http://maintainer.skolelinux.org/debian-edu-doc/it/debian-edu-wheezy-manual.pdf">Italian
+PDF version</a> or the
+<a href="http://maintainer.skolelinux.org/debian-edu-doc/de/debian-edu-wheezy-manual.html">German
+HTML version</a>. We do not yet build the epub version by default,
+but perhaps it will be done in the future.</p>
+
+<p>To learn more, check out
+<a href="http://packages.qa.debian.org/d/debian-edu-doc.html">the
+debian-edu-doc package</a>,
+<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">the
+manual on the wiki</a> and
+<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/Translations">the
+translation instructions</a> in the manual.</p>
</description>
</item>
<item>
- <title>Running TP-Link MR3040 as a batman-adv mesh node using openwrt</title>
- <link>http://people.skolelinux.org/pere/blog/Running_TP_Link_MR3040_as_a_batman_adv_mesh_node_using_openwrt.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Running_TP_Link_MR3040_as_a_batman_adv_mesh_node_using_openwrt.html</guid>
- <pubDate>Sun, 10 Nov 2013 23:00:00 +0100</pubDate>
- <description><p>Continuing my research into mesh networking, I was recommended to
-use TP-Link 3040 and 3600 access points as mesh nodes, and the pair I
-bought arrived on Friday. Here are my notes on how to set up the
-MR3040 as a mesh node using
-<a href="http://www.openwrt.org/">OpenWrt</a>.</p>
-
-<p>I started by following the instructions on the OpenWRT wiki for
-<a href="http://wiki.openwrt.org/toh/tp-link/tl-mr3040">TL-MR3040</a>,
-and downloaded
-<a href="http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin">the
-recommended firmware image</a>
-(openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin) and
-uploaded it into the original web interface. The flashing went fine,
-and the machine was available via telnet on the ethernet port. After
-logging in and setting the root password, ssh was available and I
-could start to set it up as a batman-adv mesh node.</p>
-
-<p>I started off by reading the instructions from
-<a href="http://wirelessafrica.meraka.org.za/wiki/index.php?title=Antoine's_Research">Wireless
-Africa</a>, which had quite a lot of useful information, but
-eventually I followed the recipe from the Open Mesh wiki for
-<a href="http://www.open-mesh.org/projects/batman-adv/wiki/Batman-adv-openwrt-config">using
-batman-adv on OpenWrt</a>. A small snag was the fact that the
-<tt>opkg install kmod-batman-adv</tt> command did not work as it
-should. The batman-adv kernel module would fail to load because its
-dependency crc16 was not already loaded. I
-<a href="https://dev.openwrt.org/ticket/14452">reported the bug</a> to
-the openwrt project and hope it will be fixed soon. But the problem
-only seem to affect initial testing of batman-adv, as configuration
-seem to work when booting from scratch.</p>
-
-<p>The setup is done using files in /etc/config/. I did not bridge
-the Ethernet and mesh interfaces this time, to be able to hook up the
-box on my local network and log into it for configuration updates.
-The following files were changed and look like this after modifying
-them:</p>
-
-<p><tt>/etc/config/network</tt></p>
-
-<pre>
-
-config interface 'loopback'
- option ifname 'lo'
- option proto 'static'
- option ipaddr '127.0.0.1'
- option netmask '255.0.0.0'
-
-config globals 'globals'
- option ula_prefix 'fdbf:4c12:3fed::/48'
-
-config interface 'lan'
- option ifname 'eth0'
- option type 'bridge'
- option proto 'dhcp'
- option ipaddr '192.168.1.1'
- option netmask '255.255.255.0'
- option hostname 'tl-mr3040'
- option ip6assign '60'
-
-config interface 'mesh'
- option ifname 'adhoc0'
- option mtu '1528'
- option proto 'batadv'
- option mesh 'bat0'
-</pre>
-
-<p><tt>/etc/config/wireless</tt></p>
-<pre>
-
-config wifi-device 'radio0'
- option type 'mac80211'
- option channel '11'
- option hwmode '11ng'
- option path 'platform/ar933x_wmac'
- option htmode 'HT20'
- list ht_capab 'SHORT-GI-20'
- list ht_capab 'SHORT-GI-40'
- list ht_capab 'RX-STBC1'
- list ht_capab 'DSSS_CCK-40'
- option disabled '0'
-
-config wifi-iface 'wmesh'
- option device 'radio0'
- option ifname 'adhoc0'
- option network 'mesh'
- option encryption 'none'
- option mode 'adhoc'
- option bssid '02:BA:00:00:00:01'
- option ssid 'meshfx@hackeriet'
-</pre>
-<p><tt>/etc/config/batman-adv</tt></p>
-<pre>
-
-config 'mesh' 'bat0'
- option interfaces 'adhoc0'
- option 'aggregated_ogms'
- option 'ap_isolation'
- option 'bonding'
- option 'fragmentation'
- option 'gw_bandwidth'
- option 'gw_mode'
- option 'gw_sel_class'
- option 'log_level'
- option 'orig_interval'
- option 'vis_mode'
- option 'bridge_loop_avoidance'
- option 'distributed_arp_table'
- option 'network_coding'
- option 'hop_penalty'
-
-# yet another batX instance
-# config 'mesh' 'bat5'
-# option 'interfaces' 'second_mesh'
-</pre>
-
-<p>The mesh node is now operational. I have yet to test its range,
-but I hope it is good. I have not yet tested the TP-Link 3600 box
-still wrapped up in plastic.</p>
+ <title>Hvordan enkelt laste ned filmer fra NRK med den "nye" løsningen</title>
+ <link>http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html</guid>
+ <pubDate>Mon, 16 Jun 2014 19:20:00 +0200</pubDate>
+ <description><p>Jeg har fortsatt behov for å kunne laste ned innslag fra NRKs
+nettsted av og til for å se senere når jeg ikke er på nett, men
+<a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK.html">min
+oppskrift fra 2011</a> sluttet å fungere da NRK byttet
+avspillermetode. I dag fikk jeg endelig lett etter oppdatert løsning,
+og jeg er veldig glad for å fortelle at den enkleste måten å laste ned
+innslag er å bruke siste versjon 2014.06.07 av
+<a href="http://rg3.github.io/youtube-dl/">youtube-dl</a>. Støtten i
+youtube-dl <a href="https://github.com/rg3/youtube-dl/issues/2980">kom
+inn for 23 dager siden</a> og
+<a href="http://packages.qa.debian.org/y/youtube-dl.html">versjonen i
+Debian</a> fungerer fint også som backport til Debian Wheezy. Det er
+et lite problem, det håndterer kun URLer med små bokstaver, men hvis
+en har en URL med store bokstaver kan en bare gjøre alle store om til
+små bokstaver for å få youtube-dl til å laste ned. Rapporterte
+nettopp
+<a href="https://github.com/rg3/youtube-dl/issues/2980">problemet til
+utviklerne</a>, og antar de får fikset det snart.</p>
+
+<p>Dermed er alt klart til å laste ned dokumentarene om
+<a href="http://tv.nrk.no/program/KOID23005014/usas-hemmelige-avlytting">USAs
+hemmelige avlytting</a> og
+<a href="http://tv.nrk.no/program/KOID23005114/selskapene-bak-usas-avlytting">Selskapene
+bak USAs avlytting</a>, i tillegg til
+<a href="http://tv.nrk.no/program/KOID20005814/et-moete-med-edward-snowden">intervjuet
+med Edward Snowden gjort av den tyske tv-kanalen ARD</a>. Anbefaler
+alle å se disse, sammen med
+<a href="http://media.ccc.de/browse/congress/2013/30C3_-_5713_-_en_-_saal_2_-_201312301130_-_to_protect_and_infect_part_2_-_jacob.html">foredraget
+til Jacob Appelbaum på siste CCC-konferanse</a>, for å forstå mer om
+hvordan overvåkningen av borgerne brer om seg.</p>
+
+<p>Takk til gode venner på foreningen NUUGs IRC-kanal
+<a href="irc://irc.freenode.net/%23nuug">#nuug på irc.freenode.net</a>
+for tipsene som fikk meg i mål</a>.</p>
+
+<p><strong>Oppdatering 2014-06-17</strong>: Etter at jeg publiserte
+denne, ble jeg tipset om bloggposten
+"<a href="http://ingvar.blog.redpill-linpro.com/2012/05/31/downloading-hd-content-from-tv-nrk-no/">Downloading
+HD content from tv.nrk.no</a>" av Ingvar Hagelund, som har alternativ
+implementasjon og tips for å lage mkv-fil med undertekstene inkludert.
+Kanskje den passer bedre for deg? I tillegg ble feilen i youtube-dl
+ble fikset litt senere ut på dagen i går, samt at youtube-dl fikk
+støtte for å laste ned undertitler. Takk til Anders Einar Hilden for
+god innsats og youtube-dl-utviklerne for rask respons.</p>
</description>
</item>
<item>
- <title>Debian init.d boot script example for rsyslog</title>
- <link>http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html</guid>
- <pubDate>Sat, 2 Nov 2013 22:40:00 +0100</pubDate>
- <description><p>If one of the points of switching to a new init system in Debian is
-<a href="http://thomas.goirand.fr/blog/?p=147">to get rid of huge
-init.d scripts</a>, I doubt we need to switch away from sysvinit and
-init.d scripts at all. Here is an example init.d script, ie a rewrite
-of /etc/init.d/rsyslog:</p>
-
-<p><pre>
-#!/lib/init/init-d-script
-### BEGIN INIT INFO
-# Provides: rsyslog
-# Required-Start: $remote_fs $time
-# Required-Stop: umountnfs $time
-# X-Stop-After: sendsigs
-# Default-Start: 2 3 4 5
-# Default-Stop: 0 1 6
-# Short-Description: enhanced syslogd
-# Description: Rsyslog is an enhanced multi-threaded syslogd.
-# It is quite compatible to stock sysklogd and can be
-# used as a drop-in replacement.
-### END INIT INFO
-DESC="enhanced syslogd"
-DAEMON=/usr/sbin/rsyslogd
-</pre></p>
-
-<p>Pretty minimalistic to me... For the record, the original sysv-rc
-script was 137 lines, and the above is just 15 lines, most of it meta
-info/comments.</p>
-
-<p>How to do this, you ask? Well, one create a new script
-/lib/init/init-d-script looking something like this:
-
-<p><pre>
-#!/bin/sh
+ <title>Free software car computer solution?</title>
+ <link>http://people.skolelinux.org/pere/blog/Free_software_car_computer_solution_.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Free_software_car_computer_solution_.html</guid>
+ <pubDate>Thu, 29 May 2014 18:45:00 +0200</pubDate>
+ <description><p>Dear lazyweb. I'm planning to set up a small Raspberry Pi computer
+in my car, connected to
+<a href="http://www.dx.com/p/400a-4-0-tft-lcd-digital-monitor-for-vehicle-parking-reverse-camera-1440x272-12v-dc-57776">a
+small screen</a> next to the rear mirror. I plan to hook it up with a
+GPS and a USB wifi card too. The idea is to get my own
+"<a href="http://en.wikipedia.org/wiki/Carputer">Carputer</a>". But I
+wonder if someone already created a good free software solution for
+such car computer.</p>
+
+<p>This is my current wish list for such system:</p>
-# Define LSB log_* functions.
-# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
-# and status_of_proc is working.
-. /lib/lsb/init-functions
-
-#
-# Function that starts the daemon/service
-
-#
-do_start()
-{
- # Return
- # 0 if daemon has been started
- # 1 if daemon was already running
- # 2 if daemon could not be started
- start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
- || return 1
- start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
- $DAEMON_ARGS \
- || return 2
- # Add code here, if necessary, that waits for the process to be ready
- # to handle requests from services started subsequently which depend
- # on this one. As a last resort, sleep for some time.
-}
+<ul>
-#
-# Function that stops the daemon/service
-#
-do_stop()
-{
- # Return
- # 0 if daemon has been stopped
- # 1 if daemon was already stopped
- # 2 if daemon could not be stopped
- # other if a failure occurred
- start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
- RETVAL="$?"
- [ "$RETVAL" = 2 ] && return 2
- # Wait for children to finish too if this is a daemon that forks
- # and if the daemon is only ever run from this initscript.
- # If the above conditions are not satisfied then add some other code
- # that waits for the process to drop all resources that could be
- # needed by services started subsequently. A last resort is to
- # sleep for some time.
- start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
- [ "$?" = 2 ] && return 2
- # Many daemons don't delete their pidfiles when they exit.
- rm -f $PIDFILE
- return "$RETVAL"
-}
+ <li>Work on Raspberry Pi.</li>
-#
-# Function that sends a SIGHUP to the daemon/service
-#
-do_reload() {
- #
- # If the daemon can reload its configuration without
- # restarting (for example, when it is sent a SIGHUP),
- # then implement that here.
- #
- start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
- return 0
-}
+ <li>Show current speed limit based on location, and warn if going too
+ fast (for example using color codes yellow and red on the screen,
+ or make a sound). This could be done either using either data from
+ <a href="http://www.openstreetmap.org/">Openstreetmap</a> or OCR
+ info gathered from a dashboard camera.</li>
-SCRIPTNAME=$1
-scriptbasename="$(basename $1)"
-echo "SN: $scriptbasename"
-if [ "$scriptbasename" != "init-d-library" ] ; then
- script="$1"
- shift
- . $script
-else
- exit 0
-fi
-
-NAME=$(basename $DAEMON)
-PIDFILE=/var/run/$NAME.pid
-
-# Exit if the package is not installed
-#[ -x "$DAEMON" ] || exit 0
-
-# Read configuration variable file if it is present
-[ -r /etc/default/$NAME ] && . /etc/default/$NAME
-
-# Load the VERBOSE setting and other rcS variables
-. /lib/init/vars.sh
-
-case "$1" in
- start)
- [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
- do_start
- case "$?" in
- 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
- 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
- esac
- ;;
- stop)
- [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
- do_stop
- case "$?" in
- 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
- 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
- esac
- ;;
- status)
- status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
- ;;
- #reload|force-reload)
- #
- # If do_reload() is not implemented then leave this commented out
- # and leave 'force-reload' as an alias for 'restart'.
- #
- #log_daemon_msg "Reloading $DESC" "$NAME"
- #do_reload
- #log_end_msg $?
- #;;
- restart|force-reload)
- #
- # If the "reload" option is implemented then remove the
- # 'force-reload' alias
- #
- log_daemon_msg "Restarting $DESC" "$NAME"
- do_stop
- case "$?" in
- 0|1)
- do_start
- case "$?" in
- 0) log_end_msg 0 ;;
- 1) log_end_msg 1 ;; # Old process is still running
- *) log_end_msg 1 ;; # Failed to start
- esac
- ;;
- *)
- # Failed to stop
- log_end_msg 1
- ;;
- esac
- ;;
- *)
- echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
- exit 3
- ;;
-esac
-
-:
-</pre></p>
-
-<p>It is based on /etc/init.d/skeleton, and could be improved quite a
-lot. I did not really polish the approach, so it might not always
-work out of the box, but you get the idea. I did not try very hard to
-optimize it nor make it more robust either.</p>
-
-<p>A better argument for switching init system in Debian than reducing
-the size of init scripts (which is a good thing to do anyway), is to
-get boot system that is able to handle the kernel events sensibly and
-robustly, and do not depend on the boot to run sequentially. The boot
-and the kernel have not behaved sequentially in years.</p>
-</description>
- </item>
-
- <item>
- <title>Browser plugin for SPICE (spice-xpi) uploaded to Debian</title>
- <link>http://people.skolelinux.org/pere/blog/Browser_plugin_for_SPICE__spice_xpi__uploaded_to_Debian.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Browser_plugin_for_SPICE__spice_xpi__uploaded_to_Debian.html</guid>
- <pubDate>Fri, 1 Nov 2013 11:00:00 +0100</pubDate>
- <description><p><a href="http://www.spice-space.org/">The SPICE protocol</a> for
-remote display access is the preferred solution with oVirt and RedHat
-Enterprise Virtualization, and I was sad to discover the other day
-that the browser plugin needed to use these systems seamlessly was
-missing in Debian. The <a href="http://bugs.debian.org/668284">request
-for a package</a> was from 2012-04-10 with no progress since
-2013-04-01, so I decided to wrap up a package based on the great work
-from Cajus Pollmeier and put it in a collab-maint maintained git
-repository to get a package I could use. I would very much like
-others to help me maintain the package (or just take over, I do not
-mind), but as no-one had volunteered so far, I just uploaded it to
-NEW. I hope it will be available in Debian in a few days.</p>
-
-<p>The source is now available from
-<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>
+ <li>Track automatic toll road passes and their cost, show total spent
+ and make it possible to calculate toll costs for planned
+ route.</li>
+
+ <li>Collect GPX tracks for use with OpenStreetMap.</li>
+
+ <li>Automatically detect and use any wireless connection to connect
+ to home server. Try IP over DNS
+ (<a href="http://dev.kryo.se/iodine/">iodine</a>) or ICMP
+ (<a href="http://code.gerade.org/hans/">Hans</a>) if direct
+ connection do not work.</li>
+
+ <li>Set up mesh network to talk to other cars with the same system,
+ or some standard car mesh protocol.</li>
+
+ <li>Warn when approaching speed cameras and speed camera ranges
+ (speed calculated between two cameras).</li>
+
+ <li>Suport dashboard/front facing camera to discover speed limits and
+ run OCR to track registration number of passing cars.</li>
+
+</ul>
+
+<p>If you know of any free software car computer system supporting
+some or all of these features, please let me know.</p>
</description>
</item>
projects / homepage.git / blobdiff