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<item>
- <title>Teaching vmdebootstrap to create Raspberry Pi SD card images</title>
- <link>http://people.skolelinux.org/pere/blog/Teaching_vmdebootstrap_to_create_Raspberry_Pi_SD_card_images.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Teaching_vmdebootstrap_to_create_Raspberry_Pi_SD_card_images.html</guid>
- <pubDate>Sun, 27 Oct 2013 17:00:00 +0100</pubDate>
- <description><p>The
-<a href="http://packages.qa.debian.org/v/vmdebootstrap.html">vmdebootstrap</a>
-program is a a very nice system to create virtual machine images. It
-create a image file, add a partition table, mount it and run
-debootstrap in the mounted directory to create a Debian system on a
-stick. Yesterday, I decided to try to teach it how to make images for
-<a href="https://wiki.debian.org/RaspberryPi">Raspberry Pi</a>, as part
-of a plan to simplify the build system for the FreedomBox project.
-The FreedomBox project already uses vmdebootstrap for the virtualbox
-images, but its current build system made multistrap based system for
-Dreamplug images, and it is lacking support for Raspberry Pi.</p>
-
-<p>Armed with the knowledge on how to build "foreign" (aka non-native
-architecture) chroots for Raspberry Pi, I dived into the vmdebootstrap
-code and adjusted it to be able to build armel images on my amd64
-Debian laptop. I ended up giving vmdebootstrap five new options,
-allowing me to replicate the image creation process I use to make
-<a href=http://people.skolelinux.org/pere/blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html"">Debian
-Jessie based mesh node images for the Raspberry Pi</a>. First, the
-<tt>--foreign /path/to/binfm_handler</tt> option tell vmdebootstrap to
-call debootstrap with --foreign and to copy the handler into the
-generated chroot before running the second stage. This allow
-vmdebootstrap to create armel images on an amd64 host. Next I added
-two new options <tt>--bootsize size</tt> and <tt>--boottype
-fstype</tt> to teach it to create a separate /boot/ partition with the
-given file system type, allowing me to create an image with a vfat
-partition for the /boot/ stuff. I also added a <tt>--variant
-variant</tt> option to allow me to create smaller images without the
-Debian base system packages installed. Finally, I added an option
-<tt>--no-extlinux</tt> to tell vmdebootstrap to not install extlinux
-as a boot loader. It is not needed on the Raspberry Pi and probably
-most other non-x86 architectures. The changes were accepted by the
-upstream author of vmdebootstrap yesterday and today, and is now
-available from
-<a href="http://git.liw.fi/cgi-bin/cgit/cgit.cgi/vmdebootstrap/">the
-upstream project page</a>.</p>
-
-<p>To use it to build a Raspberry Pi image using Debian Jessie, first
-create a small script (the customize script) to add the non-free
-binary blob needed to boot the Raspberry Pi and the APT source
-list:</p>
-
-<p><pre>
+ <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
-set -e # Exit on first error
-rootdir="$1"
-cd "$rootdir"
-cat &lt;&lt;EOF > etc/apt/sources.list
-deb http://http.debian.net/debian/ jessie main contrib non-free
-EOF
-# Install non-free binary blob needed to boot Raspberry Pi. This
-# install a kernel somewhere too.
-wget https://raw.github.com/Hexxeh/rpi-update/master/rpi-update \
- -O $rootdir/usr/bin/rpi-update
-chmod a+x $rootdir/usr/bin/rpi-update
-mkdir -p $rootdir/lib/modules
-touch $rootdir/boot/start.elf
-chroot $rootdir rpi-update
-</pre></p>
-
-<p>Next, fetch the latest vmdebootstrap script and call it like this
-to build the image:</p>
-
-<pre>
-sudo ./vmdebootstrap \
- --variant minbase \
- --arch armel \
- --distribution jessie \
- --mirror http://http.debian.net/debian \
- --image test.img \
- --size 600M \
- --bootsize 64M \
- --boottype vfat \
- --log-level debug \
- --verbose \
- --no-kernel \
- --no-extlinux \
- --root-password raspberry \
- --hostname raspberrypi \
- --foreign /usr/bin/qemu-arm-static \
- --customize `pwd`/customize \
- --package netbase \
- --package git-core \
- --package binutils \
- --package ca-certificates \
- --package wget \
- --package kmod
-</pre></p>
-
-<p>The list of packages being installed are the ones needed by
-rpi-update to make the image bootable on the Raspberry Pi, with the
-exception of netbase, which is needed by debootstrap to find
-/etc/hosts with the minbase variant. I really wish there was a way to
-set up an Raspberry Pi using only packages in the Debian archive, but
-that is not possible as far as I know, because it boots from the GPU
-using a non-free binary blob.</p>
-
-<p>The build host need debootstrap, kpartx and qemu-user-static and
-probably a few others installed. I have not checked the complete
-build dependency list.</p>
-
-<p>The resulting image will not use the hardware floating point unit
-on the Raspberry PI, because the armel architecture in Debian is not
-optimized for that use. So the images created will be a bit slower
-than <a href="http://www.raspbian.org/">Raspbian</a> based images.</p>
+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'
+}
+
+lookup() {
+ url="$1"
+ curl -s -H 'Accept: application/vnd.vegvesen.nvdb-v1+xml' \
+ "https://www.vegvesen.no/nvdb/api$url" | xmllint --format -
+}
+
+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>Det er jo makta som er mest sårbar ved massiv overvåkning av Internett</title>
- <link>http://people.skolelinux.org/pere/blog/Det_er_jo_makta_som_er_mest_s_rbar_ved_massiv_overv_kning_av_Internett.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Det_er_jo_makta_som_er_mest_s_rbar_ved_massiv_overv_kning_av_Internett.html</guid>
- <pubDate>Sat, 26 Oct 2013 20:30:00 +0200</pubDate>
- <description><p>De siste måneders eksponering av
-<a href="http://www.aftenposten.no/nyheter/uriks/Her-er-Edvard-Snowdens-mest-omtalte-avsloringer-7351734.html">den
-totale overvåkningen som foregår i den vestlige verden dokumenterer
-hvor sårbare vi er</a>. Men det slår meg at de som er mest sårbare
-for dette, myndighetspersoner på alle nivåer, neppe har innsett at de
-selv er de mest interessante personene å lage profiler på, for å kunne
-påvirke dem.</p>
-
-<p>For å ta et lite eksempel: Stortingets nettsted,
-<a href="http://www.stortinget.no/">www.stortinget.no</a> (og
-forsåvidt også
-<a href="http://data.stortinget.no/">data.stortinget.no</a>),
-inneholder informasjon om det som foregår på Stortinget, og jeg antar
-de største brukerne av informasjonen der er representanter og
-rådgivere på Stortinget. Intet overraskende med det. Det som derimot
-er mer skjult er at Stortingets nettsted bruker
-<a href="http://en.wikipedia.org/wiki/Google_Analytics">Google
-Analytics</a>, hvilket gjør at enhver som besøker nettsidene der også
-rapporterer om besøket via Internett-linjer som passerer Sverige,
-England og videre til USA. Det betyr at informasjon om ethvert besøk
-på stortingets nettsider kan snappes opp av svensk, britisk og USAs
-etterretningsvesen. De kan dermed holde et øye med hvilke
-Stortingssaker stortingsrepresentantene synes er interessante å sjekke
-ut, og hvilke sider rådgivere og andre på stortinget synes er
-interessant å besøke, når de gjør det og hvilke andre representanter
-som sjekker de samme sidene omtrent samtidig. Stortingets bruk av
-Google Analytics gjør det dermed enkelt for utenlands etteretning å
-spore representantenes aktivitet og interesse. Hvis noen av
-representantene bruker Google Mail eller noen andre tjenestene som
-krever innlogging, så vil det være enda enklere å finne ut nøyaktig
-hvilke personer som bruker hvilke nettlesere og dermed knytte
-informasjonen opp til enkeltpersoner på Stortinget.</p>
-
-<p>Og jo flere nettsteder som bruker Google Analytics, jo bedre
-oversikt over stortingsrepresentantenes lesevaner og interesse blir
-tilgjengelig for svensk, britisk og USAs etterretning. Hva de kan
-bruke den informasjonen til overlater jeg til leseren å undres
-over.</p>
-</description>
- </item>
-
- <item>
- <title>A Raspberry Pi based batman-adv Mesh network node</title>
- <link>http://people.skolelinux.org/pere/blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html</guid>
- <pubDate>Mon, 21 Oct 2013 11:40:00 +0200</pubDate>
- <description><p>The last few days I have been experimenting with
-<a href="http://www.open-mesh.org/projects/batman-adv/wiki">the
-batman-adv mesh technology</a>. I want to gain some experience to see
-if it will fit <a href="https://wiki.debian.org/FreedomBox">the
-Freedombox project</a>, and together with my neighbors try to build a
-mesh network around the park where I live. Batman-adv is a layer 2
-mesh system ("ethernet" in other words), where the mesh network appear
-as if all the mesh clients are connected to the same switch.</p>
-
-<p>My hardware of choice was the Linksys WRT54GL routers I had lying
-around, but I've been unable to get them working with batman-adv. So
-instead, I started playing with a
-<a href="http://www.raspberrypi.org/">Raspberry Pi</a>, and tried to
-get it working as a mesh node. My idea is to use it to create a mesh
-node which function as a switch port, where everything connected to
-the Raspberry Pi ethernet plug is connected (bridged) to the mesh
-network. This allow me to hook a wifi base station like the Linksys
-WRT54GL to the mesh by plugging it into a Raspberry Pi, and allow
-non-mesh clients to hook up to the mesh. This in turn is useful for
-Android phones using <a href="http://servalproject.org/">the Serval
-Project</a> voip client, allowing every one around the playground to
-phone and message each other for free. The reason is that Android
-phones do not see ad-hoc wifi networks (they are filtered away from
-the GUI view), and can not join the mesh without being rooted. But if
-they are connected using a normal wifi base station, they can talk to
-every client on the local network.</p>
-
-<p>To get this working, I've created a debian package
-<a href="https://github.com/petterreinholdtsen/meshfx-node">meshfx-node</a>
-and a script
-<a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/build-rpi-mesh-node">build-rpi-mesh-node</a>
-to create the Raspberry Pi boot image. I'm using Debian Jessie (and
-not Raspbian), to get more control over the packages available.
-Unfortunately a huge binary blob need to be inserted into the boot
-image to get it booting, but I'll ignore that for now. Also, as
-Debian lack support for the CPU features available in the Raspberry
-Pi, the system do not use the hardware floating point unit. I hope
-the routing performance isn't affected by the lack of hardware FPU
-support.</p>
-
-<p>To create an image, run the following with a sudo enabled user
-after inserting the target SD card into the build machine:</p>
-
-<p><pre>
-% wget -O build-rpi-mesh-node \
- https://raw.github.com/petterreinholdtsen/meshfx-node/master/build-rpi-mesh-node
-% sudo bash -x ./build-rpi-mesh-node > build.log 2>&1
-% dd if=/root/rpi/rpi_basic_jessie_$(date +%Y%m%d).img of=/dev/mmcblk0 bs=1M
-%
-</pre></p>
-
-<p>Booting with the resulting SD card on a Raspberry PI with a USB
-wifi card inserted should give you a mesh node. At least it does for
-me with a the wifi card I am using. The default mesh settings are the
-ones used by the Oslo mesh project at Hackeriet, as I mentioned in
-<a href="http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">an
-earlier blog post about this mesh testing</a>.</p>
-
-<p>The mesh node was not horribly expensive either. I bought
-everything over the counter in shops nearby. If I had ordered online
-from the lowest bidder, the price should be significantly lower:</p>
+ <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>Supplier</th><th>Model</th><th>NOK</th></tr>
-<tr><td>Teknikkmagasinet</td><td>Raspberry Pi model B</td><td>349.90</td></tr>
-<tr><td>Teknikkmagasinet</td><td>Raspberry Pi type B case</td><td>99.90</td></tr>
-<tr><td>Lefdal</td><td>Jensen Air:Link 25150</td><td>295.-</td></tr>
-<tr><td>Clas Ohlson</td><td>Kingston 16 GB SD card</td><td>199.-</td></tr>
-<tr><td>Total cost</td><td></td><td>943.80</td></tr>
+<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>Now my mesh network at home consist of one laptop in the basement
-connected to my production network, one Raspberry Pi node on the 1th
-floor that can be seen by my neighbor across the park, and one
-play-node I use to develop the image building script. And some times
-I hook up my work horse laptop to the mesh to test it. I look forward
-to figuring out what kind of latency the batman-adv setup will give,
-and how much packet loss we will experience around the park. :)</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
+}
+
+override_install
+</pre></blockquote></p>
+
+<p>To clean up, another shell script should go into
+/usr/lib/finish-install.d/ with code like this:
+
+<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
+}
+
+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>Perl library to control the Spykee robot moved to github</title>
- <link>http://people.skolelinux.org/pere/blog/Perl_library_to_control_the_Spykee_robot_moved_to_github.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Perl_library_to_control_the_Spykee_robot_moved_to_github.html</guid>
- <pubDate>Sat, 19 Oct 2013 10:20:00 +0200</pubDate>
- <description><p>Back in 2010, I created a Perl library to talk to
-<a href="http://en.wikipedia.org/wiki/Spykee">the Spykee robot</a>
-(with two belts, wifi, USB and Linux) and made it available from my
-web page. Today I concluded that it should move to a site that is
-easier to use to cooperate with others, and moved it to github. If
-you got a Spykee robot, you might want to check out
-<a href="https://github.com/petterreinholdtsen/libspykee-perl">the
-libspykee-perl github repository</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>Good causes: Debian Outreach Program for Women, EFF documenting the spying and Open access in Norway</title>
- <link>http://people.skolelinux.org/pere/blog/Good_causes__Debian_Outreach_Program_for_Women__EFF_documenting_the_spying_and_Open_access_in_Norway.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Good_causes__Debian_Outreach_Program_for_Women__EFF_documenting_the_spying_and_Open_access_in_Norway.html</guid>
- <pubDate>Tue, 15 Oct 2013 21:30:00 +0200</pubDate>
- <description><p>The last few days I came across a few good causes that should get
-wider attention. I recommend signing and donating to each one of
-these. :)</p>
-
-<p>Via <a href="http://www.debian.org/News/weekly/2013/18/">Debian
-Project News for 2013-10-14</a> I came across the Outreach Program for
-Women program which is a Google Summer of Code like initiative to get
-more women involved in free software. One debian sponsor has offered
-to match <a href="http://debian.ch/opw2013">any donation done to Debian
-earmarked</a> for this initiative. I donated a few minutes ago, and
-hope you will to. :)</p>
-
-<p>And the Electronic Frontier Foundation just announced plans to
-create <a href="https://supporters.eff.org/donate/nsa-videos">video
-documentaries about the excessive spying</a> on every Internet user that
-take place these days, and their need to fund the work. I've already
-donated. Are you next?</p>
-
-<p>For my Norwegian audience, the organisation Studentenes og
-Akademikernes Internasjonale Hjelpefond is collecting signatures for a
-statement under the heading
-<a href="http://saih.no/Bloggers_United/">Bloggers United for Open
-Access</a> for those of us asking for more focus on open access in the
-Norwegian government. So far 499 signatures. I hope you will sign it
-too.</p>
+ <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>Oslo community mesh network - with NUUG and Hackeriet at Hausmania</title>
- <link>http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html</guid>
- <pubDate>Fri, 11 Oct 2013 14:10:00 +0200</pubDate>
- <description><p>Wireless mesh networks are self organising and self healing
-networks that can be used to connect computers across small and large
-areas, depending on the radio technology used. Normal wifi equipment
-can be used to create home made radio networks, and there are several
-successful examples like
-<a href="http://www.freifunk.net/">Freifunk</a> and
-<a href="http://www.awmn.net/">Athens Wireless Metropolitan Network</a>
-(see
-<a href="http://en.wikipedia.org/wiki/List_of_wireless_community_networks_by_region#Greece">wikipedia
-for a large list</a>) around the globe. To give you an idea how it
-work, check out the nice overview of the Kiel Freifunk community which
-can be seen from their
-<a href="http://freifunk.in-kiel.de/ffmap/nodes.html">dynamically
-updated node graph and map</a>, where one can see how the mesh nodes
-automatically handle routing and recover from nodes disappearing.
-There is also a small community mesh network group in Oslo, Norway,
-and that is the main topic of this blog post.</p>
-
-<p>I've wanted to check out mesh networks for a while now, and hoped
-to do it as part of my involvement with the <a
-href="http://www.nuug.no/">NUUG member organisation</a> community, and
-my recent involvement in
-<a href="https://wiki.debian.org/FreedomBox">the Freedombox project</a>
-finally lead me to give mesh networks some priority, as I suspect a
-Freedombox should use mesh networks to connect neighbours and family
-when possible, given that most communication between people are
-between those nearby (as shown for example by research on Facebook
-communication patterns). It also allow people to communicate without
-any central hub to tap into for those that want to listen in on the
-private communication of citizens, which have become more and more
-important over the years.</p>
-
-<p>So far I have only been able to find one group of people in Oslo
-working on community mesh networks, over at the hack space
-<a href="http://hackeriet.no/">Hackeriet</a> at Husmania. They seem to
-have started with some Freifunk based effort using OLSR, called
-<a href="http://oslo.freifunk.net/index.php?title=Main_Page">the Oslo
-Freifunk project</a>, but that effort is now dead and the people
-behind it have moved on to a batman-adv based system called
-<a href="http://meshfx.org/trac">meshfx</a>. Unfortunately the wiki
-site for the Oslo Freifunk project is no longer possible to update to
-reflect this fact, so the old project page can't be updated to point to
-the new project. A while back, the people at Hackeriet invited people
-from the Freifunk community to Oslo to talk about mesh networks. I
-came across this video where Hans Jørgen Lysglimt interview the
-speakers about this talk (from
-<a href="https://www.youtube.com/watch?v=N2Kd7CLkhSY">youtube</a>):</p>
-
-<p><iframe width="420" height="315" src="https://www.youtube.com/embed/N2Kd7CLkhSY" frameborder="0" allowfullscreen></iframe></p>
-
-<p>I mentioned OLSR and batman-adv, which are mesh routing protocols.
-There are heaps of different protocols, and I am still struggling to
-figure out which one would be "best" for some definitions of best, but
-given that the community mesh group in Oslo is so small, I believe it
-is best to hook up with the existing one instead of trying to create a
-completely different setup, and thus I have decided to focus on
-batman-adv for now. It sure help me to know that the very cool
-<a href="http://www.servalproject.org/">Serval project in Australia</a>
-is using batman-adv as their meshing technology when it create a self
-organizing and self healing telephony system for disaster areas and
-less industrialized communities. Check out this cool video presenting
-that project (from
-<a href="https://www.youtube.com/watch?v=30qNfzJCQOA">youtube</a>):</p>
-
-<p><iframe width="560" height="315" src="https://www.youtube.com/embed/30qNfzJCQOA" frameborder="0" allowfullscreen></iframe></p>
-
-<p>According to the wikipedia page on
-<a href="http://en.wikipedia.org/wiki/Wireless_mesh_network">Wireless
-mesh network</a> there are around 70 competing schemes for routing
-packets across mesh networks, and OLSR, B.A.T.M.A.N. and
-B.A.T.M.A.N. advanced are protocols used by several free software
-based community mesh networks.</p>
-
-<p>The batman-adv protocol is a bit special, as it provide layer 2
-(as in ethernet ) routing, allowing ipv4 and ipv6 to work on the same
-network. One way to think about it is that it provide a mesh based
-vlan you can bridge to or handle like any other vlan connected to your
-computer. The required drivers are already in the Linux kernel at
-least since Debian Wheezy, and it is fairly easy to set up. A
-<a href="http://www.open-mesh.org/projects/batman-adv/wiki/Quick-start-guide">good
-introduction</a> is available from the Open Mesh project. These are
-the key settings needed to join the Oslo meshfx network:</p>
-
-<p><table>
-<tr><th>Setting</th><th>Value</th></tr>
-<tr><td>Protocol / kernel module</td><td>batman-adv</td></tr>
-<tr><td>ESSID</td><td>meshfx@hackeriet</td></tr>
-<td>Channel / Frequency</td><td>11 / 2462</td></tr>
-<td>Cell ID</td><td>02:BA:00:00:00:01</td>
-</table></p>
-
-<p>The reason for setting ad-hoc wifi Cell ID is to work around bugs
-in firmware used in wifi card and wifi drivers. (See a nice post from
-VillageTelco about
-"<a href="http://tiebing.blogspot.no/2009/12/ad-hoc-cell-splitting-re-post-original.html">Information
-about cell-id splitting, stuck beacons, and failed IBSS merges!</a>
-for details.) When these settings are activated and you have some
-other mesh node nearby, your computer will be connected to the mesh
-network and can communicate with any mesh node that is connected to
-any of the nodes in your network of nodes. :)</p>
-
-<p>My initial plan was to reuse my old Linksys WRT54GL as a mesh node,
-but that seem to be very hard, as I have not been able to locate a
-firmware supporting batman-adv. If anyone know how to use that old
-wifi access point with batman-adv these days, please let me know.</p>
-
-<p>If you find this project interesting and want to join, please join
-us on IRC, either channel
-<a href="irc://irc.freenode.net/#oslohackerspace">#oslohackerspace</a>
-or <a href="irc://irc.freenode.net/#nuug">#nuug</a> on
-irc.freenode.net.</p>
-
-<p>While investigating mesh networks in Oslo, I came across an old
-research paper from the university of Stavanger and Telenor Research
-and Innovation called
-<a href="http://folk.uio.no/paalee/publications/netrel-egeland-iswcs-2008.pdf">The
-reliability of wireless backhaul mesh networks</a> and elsewhere
-learned that Telenor have been experimenting with mesh networks at
-Grünerløkka in Oslo. So mesh networks are also interesting for
-commercial companies, even though Telenor discovered that it was hard
-to figure out a good business plan for mesh networking and as far as I
-know have closed down the experiment. Perhaps Telenor or others would
-be interested in a cooperation?</p>
-
-<p><strong>Update 2013-10-12</strong>: I was just
-<a href="http://lists.alioth.debian.org/pipermail/freedombox-discuss/2013-October/005900.html">told
-by the Serval project developers</a> that they no longer use
-batman-adv (but are compatible with it), but their own crypto based
-mesh system.</p>
+ <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>Skolelinux / Debian Edu 7.1 install and overview video from Marcelo Salvador</title>
- <link>http://people.skolelinux.org/pere/blog/Skolelinux___Debian_Edu_7_1_install_and_overview_video_from_Marcelo_Salvador.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Skolelinux___Debian_Edu_7_1_install_and_overview_video_from_Marcelo_Salvador.html</guid>
- <pubDate>Tue, 8 Oct 2013 17:10:00 +0200</pubDate>
- <description><p>The other day I was pleased and surprised to discover that Marcelo
-Salvador had published a
-<a href="https://www.youtube.com/watch?v=w-GgpdqgLFc">video on
-Youtube</a> showing how to install the standalone Debian Edu /
-Skolelinux profile. This is the profile intended for use at home or
-on laptops that should not be integrated into the provided network
-services (no central home directory, no Kerberos / LDAP directory etc,
-in other word a single user machine). The result is 11 minutes long,
-and show some user applications (seem to be rather randomly picked).
-Missed a few of my favorites like celestia, planets and chromium
-showing the <a href="http://www.zygotebody.com/">Zygote Body 3D model
-of the human body</a>, but I guess he did not know about those or find
-other programs more interesting. :) And the video do not show the
-advantages I believe is one of the most valuable featuers in Debian
-Edu, its central school server making it possible to run hundreds of
-computers without hard drives by installing one central
-<a href="http://www.ltsp.org/">LTSP server</a>.</p>
-
-<p>Anyway, check out the video, embedded below and linked to above:</p>
-
-<iframe width="420" height="315" src="http://www.youtube.com/embed/w-GgpdqgLFc" frameborder="0" allowfullscreen></iframe>
-
-<p>Are there other nice videos demonstrating Skolelinux? Please let
-me know. :)</p>
+ <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>
+
+<p><strong>Who are you, and how do you spend your days?</strong></p>
+
+<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>
+
+<p><strong>How did you get in contact with the Skolelinux / Debian Edu
+project?</strong></p>
+
+<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>
+
+<p><strong>What do you see as the advantages of Skolelinux / Debian
+Edu?</strong></p>
+
+<p>The independence.</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>
+
+<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>
+
+<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>
+
+<p><strong>What do you see as the disadvantages of Skolelinux / Debian
+Edu?</strong></p>
+
+<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>
+
+<p><strong>Which free software do you use daily?</strong></p>
+
+<p>Firefox, Thunderbird, LibreOffice, Ubuntu Server 12.04 (Samba,
+Apache, MySQL, Joomla!, … and Skolelinux / Debian Edu)</p>
+
+<p><strong>Which strategy do you believe is the right one to use to
+get schools to use free software?</strong></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>Finally, Debian Edu Wheezy is released today!</title>
- <link>http://people.skolelinux.org/pere/blog/Finally__Debian_Edu_Wheezy_is_released_today_.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Finally__Debian_Edu_Wheezy_is_released_today_.html</guid>
- <pubDate>Sun, 29 Sep 2013 10:20:00 +0200</pubDate>
- <description><p>A few hours ago, the announcement for the first stable release of
-Debian Edu Wheezy went out from the Debian publicity team. The
-complete announcement text can be found at
-<a href="http://www.debian.org/News/2013/20130928">the Debian News
-section</a>, translated to several languages. Please check it out.</p>
-
-<p>There is one minor known problem that we will fix very soon. One
-can not install a amd64 Thin Client Server using PXE, as the /var/
-partition is too small. A workaround is to extend the partition (use
-lvresize + resize2fs in tty 2 while installing).</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>Videos about the Freedombox project - for inspiration and learning</title>
- <link>http://people.skolelinux.org/pere/blog/Videos_about_the_Freedombox_project___for_inspiration_and_learning.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Videos_about_the_Freedombox_project___for_inspiration_and_learning.html</guid>
- <pubDate>Fri, 27 Sep 2013 14:10:00 +0200</pubDate>
- <description><p>The <a href="http://www.freedomboxfoundation.org/">Freedombox
-project</a> have been going on for a while, and have presented the
-vision, ideas and solution several places. Here is a little
-collection of videos of talks and presentation of the project.</p>
-
-<ul>
-
-<li><a href="http://www.youtube.com/watch?v=ukvUz5taxvA">FreedomBox -
-2,5 minute marketing film</a> (Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=SzW25QTVWsE">Eben Moglen
-discusses the Freedombox on CBS news 2011</a> (Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=Ae8SZbxfE0g">Eben Moglen -
-Freedom in the Cloud - Software Freedom, Privacy and and Security for
-Web 2.0 and Cloud computing at ISOC-NY Public Meeting 2010</a>
-(Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=vNaIji_3xBE">Fosdem 2011
-Keynote by Eben Moglen presenting the Freedombox</a> (Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=9bDDUyJSQ9s">Presentation of
-the Freedombox by James Vasile at Elevate in Gratz 2011</a> (Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=zQTmnk27g9s"> Freedombox -
-Discovery, Identity, and Trust by Nick Daly at Freedombox Hackfest New
-York City in 2012</a> (Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=tkbSB4Ba7Ck">Introduction
-to the Freedombox at Freedombox Hackfest New York City in 2012</a>
-(Youtube)</li>
-
-<li><a href="http://www.youtube.com/watch?v=z-P2Jaeg0aQ">Freedom, Out
-of the Box! by Bdale Garbee at linux.conf.au Ballarat, 2012</a> (Youtube) </li>
-
-<li><a href="https://archive.fosdem.org/2013/schedule/event/freedombox/">Freedombox
-1.0 by Eben Moglen and Bdale Garbee at Fosdem 2013</a> (FOSDEM) </li>
-
-<li><a href="http://www.youtube.com/watch?v=e1LpYX2zVYg">What is the
-FreedomBox today by Bdale Garbee at Debconf13 in Vaumarcus
-2013</a> (Youtube)</li>
-
-</ul>
-
-<p>A larger list is available from
-<a href="https://wiki.debian.org/FreedomBox/TalksAndPresentations">the
-Freedombox Wiki</a>.</p>
-
-<p>On other news, I am happy to report that Freedombox based on Debian
-Jessie is coming along quite well, and soon both Owncloud and using
-Tor should be available for testers of the Freedombox solution. :) In
-a few weeks I hope everything needed to test it is included in Debian.
-The withsqlite package is already in Debian, and the plinth package is
-pending in NEW. The third and vital part of that puzzle is the
-metapackage/setup framework, which is still pending an upload. Join
-us on <a href="irc://irc.debian.org:6667/%23freedombox">IRC
-(#freedombox on irc.debian.org)</a> and
-<a href="http://lists.alioth.debian.org/mailman/listinfo/freedombox-discuss">the
-mailing list</a> if you want to help make this vision come true.</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>Third and probably last beta release of Debian Edu Wheezy</title>
- <link>http://people.skolelinux.org/pere/blog/Third_and_probably_last_beta_release_of_Debian_Edu_Wheezy.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Third_and_probably_last_beta_release_of_Debian_Edu_Wheezy.html</guid>
- <pubDate>Mon, 16 Sep 2013 21:30:00 +0200</pubDate>
- <description><p>The third wheezy based beta release of Debian Edu was wrapped up
-today. This is the release announcement from Holger Levsen:</p>
-
-<blockquote>
-<p>Hi,</p>
-
-<p>it is my pleasure to announce the third beta release (beta 2 for
-short) of <a href="http://www.skolelinux.org/">Debian Edu /
-Skolelinux</a> based on Debian Wheezy!</p>
-
-<p>Please test these images extensivly, if no new problems are found
-we plan to do this final Debian Edu Wheezy release this coming
-weekend. We are not aware of any major problems or blockers in beta2,
-if you find something, please notify us immediately!</p>
-
-<p>(More about the remaining steps for the Edu Wheezy release in
-another mail to the edu list tonight or tomorrow...)</p>
-
-<p>Noteworthy changes and software updates for Debian Edu 7.1+edu0~b2
-compared to beta1:</p>
-
-<ul>
-
-<li>The KDE proxy setup has been adjusted to use the provided wpad.dat. This
-also gets Chromium to use this proxy.</li>
-<li>Install kdepim-groupware with KDE desktops to make sure korganizer
-understand ical/dav sources.</li>
-<li>Increased default maximum size of /var/spool/squid and /skole/backup on the
-main server.</li>
-<li>A source DVD image containing all source packages is now available as well.</li>
-<li>Updates for chromium (29.0.1547.57-1~deb7u1), imagemagick
-(6.7.7.10-5+deb7u2), php5 (5.4.4-14+deb7u4), libmodplug
-(0.8.8.4-3+deb7u1+git20130828), tiff (4.0.2-6+deb7u2), linux-image
-(3.2.0-4-486_3.2.46-1+deb7u1).</li>
-
-</ul>
-
-<p>Where to get it:</p>
-
-<p>To download the multiarch netinstall CD release you can use</p>
-
-<ul>
-<li><a href="ftp://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-CD.iso">ftp://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-CD.iso</a></li>
-<li><a href="http://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-CD.iso">http://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-CD.iso</a></li>
-<li>rsync -avzP ftp.skolelinux.org::skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-CD.iso .</li>
-</ul>
-
-<p>The SHA1SUM of this image is: 3a1c89f4666df80eebcd46c5bf5fedb866f9472f</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>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>
-<p>To download the multiarch USB stick ISO release you can use
<ul>
-<li><a href="ftp://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-USB.iso">ftp://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-USB.iso</a></li>
-<li><a href="http://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-USB.iso">http://ftp.skolelinux.org/skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-USB.iso</a></li>
-<li>rsync -avzP ftp.skolelinux.org::skolelinux-cd/wheezy/debian-edu-7.1+edu0~b2-USB.iso .</li>
-</ul>
-<p>The SHA1SUM of this image is: 702d1718548f401c74bfa6df9f032cc3ee16597e</p>
+ <li>Work on Raspberry Pi.</li>
-<p>The Source DVD image has the filename
-debian-edu-7.1+edu0~b2-source-DVD.iso and the SHA1SUM
-089eed8b3f962db47aae1f6a9685e9bb2fa30ca5 and is available the same way
-as the other isos.</p>
+ <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>
-<p>How to report bugs</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>
-<p>For information how to report bugs please see
-<br><a href="http://wiki.debian.org/DebianEdu/HowTo/ReportBugs">http://wiki.debian.org/DebianEdu/HowTo/ReportBugs</a></p>
+ <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>
-<p>About Debian Edu and Skolelinux</p>
+ <li>Set up mesh network to talk to other cars with the same system,
+ or some standard car mesh protocol.</li>
-<p>Debian Edu, also known as Skolelinux, is a Linux distribution based
-on Debian providing an out-of-the box environment of a completely
-configured school network. Immediately after installation a school
-server running all services needed for a school network is set up just
-waiting for users and machines being added via GOsa², a comfortable
-Web-UI. A netbooting environment is prepared using PXE, so after
-initial installation of the main server from CD or USB stick all other
-machines can be installed via the network. The provided school server
-provides LDAP database and Kerberos authentication service,
-centralized home directories, DHCP server, web proxy and many other
-services. The desktop contains more than 60 educational software
-packages and more are available from the Debian archive, and schools
-can choose between KDE, Gnome, LXDE and Xfce desktop environment.</p>
+ <li>Warn when approaching speed cameras and speed camera ranges
+ (speed calculated between two cameras).</li>
-<p>This is the seventh test release based on Debian Wheezy. Basically
-this is an updated and slightly improved version compared to the
-Squeeze release.</p>
-
-<p>Notes for upgrades from Alpha Prereleases</p>
-
-<p>Alpha based installations should reinstall or downgrade the
-versions of gosa and libpam-mklocaluser to the ones used in this beta
-release. Both alpha and beta0 based installations should reinstall or
-deal with gosa.conf manually; there are two options: (1) Keep
-gosa.conf and edit this file as outlined on the mailing list. (2)
-Accept the new version of gosa.conf and replace both contained admin
-password placeholders with the password hashes found in the old one
-(backup copy!). In both cases all users need to change their password
-to make sure a password is set for CIFS access to their home
-directory.</p>
+ <li>Suport dashboard/front facing camera to discover speed limits and
+ run OCR to track registration number of passing cars.</li>
+</ul>
-<p>cheers,
-<br> Holger</p>
-</blockquote>
+<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