X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/b2c75b135ddd9dc450e82036ebf37807edef2b67..e091c54b5b41495bd50d29a44edb3619effa08a8:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 76e3ef5a99..35669e8e13 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -7,738 +7,663 @@ - Creating, updating and checking debian/copyright semi-automatically - http://people.skolelinux.org/pere/blog/Creating__updating_and_checking_debian_copyright_semi_automatically.html - http://people.skolelinux.org/pere/blog/Creating__updating_and_checking_debian_copyright_semi_automatically.html - Fri, 19 Feb 2016 15:00:00 +0100 - <p>Making packages for Debian requires quite a lot of attention to -details. And one of the details is the content of the -debian/copyright file, which should list all relevant licenses used by -the code in the package in question, preferably in -<a href="https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/">machine -readable DEP5 format</a>.</p> - -<p>For large packages with lots of contributors it is hard to write -and update this file manually, and if you get some detail wrong, the -package is normally rejected by the ftpmasters. So getting it right -the first time around get the package into Debian faster, and save -both you and the ftpmasters some work.. Today, while trying to figure -out what was wrong with -<a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686447">the -zfsonlinux copyright file</a>, I decided to spend some time on -figuring out the options for doing this job automatically, or at least -semi-automatically.</p> - -<p>Lucikly, there are at least two tools available for generating the -file based on the code in the source package, -<tt><a href="https://tracker.debian.org/pkg/debmake">debmake</a></tt> -and <tt><a href="https://tracker.debian.org/pkg/cme">cme</a></tt>. I'm -not sure which one of them came first, but both seem to be able to -create a sensible draft file. As far as I can tell, none of them can -be trusted to get the result just right, so the content need to be -polished a bit before the file is OK to upload. I found the debmake -option in -<a href="http://goofying-with-debian.blogspot.com/2014/07/debmake-checking-source-against-dep-5.html">a -blog posts from 2014</a>. - -<p>To generate using debmake, use the -cc option: - -<p><pre> -debmake -cc > debian/copyright -</pre></p> - -<p>Note there are some problems with python and non-ASCII names, so -this might not be the best option.</p> - -<p>The cme option is based on a config parsing library, and I found -this approach in -<a href="https://ddumont.wordpress.com/2015/04/05/improving-creation-of-debian-copyright-file/">a -blog post from 2015</a>. To generate using cme, use the 'update -dpkg-copyright' option: - -<p><pre> -cme update dpkg-copyright -quiet -</pre></p> - -<p>This will create or update debian/copyright. The cme tool seem to -handle UTF-8 names better than debmake.</p> - -<p>When the copyright file is created, I would also like some help to -check if the file is correct. For this I found two good options, -<tt>debmake -k</tt> and <tt>license-reconcile</tt>. The former seem -to focus on license types and file matching, and is able to detect -ineffective blocks in the copyright file. The latter reports missing -copyright holders and years, but was confused by inconsistent license -names (like CDDL vs. CDDL-1.0). I suspect it is good to use both and -fix all issues reported by them before uploading. But I do not know -if the tools and the ftpmasters agree on what is important to fix in a -copyright file, so the package might still be rejected.</p> - -<p>The devscripts tool <tt>licensecheck</tt> deserve mentioning. It -will read through the source and try to find all copyright statements. -It is not comparing the result to the content of debian/copyright, but -can be useful when verifying the content of the copyright file.</p> - -<p>Are you aware of better tools in Debian to create and update -debian/copyright file. Please let me know, or blog about it on -planet.debian.org.</p> - -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> - - - - - Using appstream in Debian to locate packages with firmware and mime type support - http://people.skolelinux.org/pere/blog/Using_appstream_in_Debian_to_locate_packages_with_firmware_and_mime_type_support.html - http://people.skolelinux.org/pere/blog/Using_appstream_in_Debian_to_locate_packages_with_firmware_and_mime_type_support.html - Thu, 4 Feb 2016 16:40:00 +0100 - <p>The <a href="https://wiki.debian.org/DEP-11">appstream system</a> -is taking shape in Debian, and one provided feature is a very -convenient way to tell you which package to install to make a given -firmware file available when the kernel is looking for it. This can -be done using apt-file too, but that is for someone else to blog -about. :)</p> - -<p>Here is a small recipe to find the package with a given firmware -file, in this example I am looking for ctfw-3.2.3.0.bin, randomly -picked from the set of firmware announced using appstream in Debian -unstable. In general you would be looking for the firmware requested -by the kernel during kernel module loading. To find the package -providing the example file, do like this:</p> - -<blockquote><pre> -% apt install appstream -[...] -% apt update -[...] -% appstreamcli what-provides firmware:runtime ctfw-3.2.3.0.bin | \ - awk '/Package:/ {print $2}' -firmware-qlogic -% -</pre></blockquote> - -<p>See <a href="https://wiki.debian.org/AppStream/Guidelines">the -appstream wiki</a> page to learn how to embed the package metadata in -a way appstream can use.</p> - -<p>This same approach can be used to find any package supporting a -given MIME type. This is very useful when you get a file you do not -know how to handle. First find the mime type using <tt>file ---mime-type</tt>, and next look up the package providing support for -it. Lets say you got an SVG file. Its MIME type is image/svg+xml, -and you can find all packages handling this type like this:</p> - -<blockquote><pre> -% apt install appstream -[...] -% apt update -[...] -% appstreamcli what-provides mimetype image/svg+xml | \ - awk '/Package:/ {print $2}' -bkchem -phototonic -inkscape -shutter -tetzle -geeqie -xia -pinta -gthumb -karbon -comix -mirage -viewnior -postr -ristretto -kolourpaint4 -eog -eom -gimagereader -midori -% -</pre></blockquote> - -<p>I believe the MIME types are fetched from the desktop file for -packages providing appstream metadata.</p> + Aftenposten-redaktøren med lua i hånda + http://people.skolelinux.org/pere/blog/Aftenposten_redakt_ren_med_lua_i_h_nda.html + http://people.skolelinux.org/pere/blog/Aftenposten_redakt_ren_med_lua_i_h_nda.html + Fri, 9 Sep 2016 11:30:00 +0200 + <p>En av dagens nyheter er at Aftenpostens redaktør Espen Egil Hansen +bruker +<a href="https://www.nrk.no/kultur/aftenposten-brukar-heile-forsida-pa-facebook-kritikk-1.13126918">forsiden +av papiravisen på et åpent brev til Facebooks sjef Mark Zuckerberg om +Facebooks fjerning av bilder, tekster og sider de ikke liker</a>. Det +må være uvant for redaktøren i avisen Aftenposten å stå med lua i +handa og håpe på å bli hørt. Spesielt siden Aftenposten har vært med +på å gi Facebook makten de nå demonstrerer at de har. Ved å melde seg +inn i Facebook-samfunnet har de sagt ja til bruksvilkårene og inngått +en antagelig bindende avtale. Kanskje de skulle lest og vurdert +vilkårene litt nærmere før de sa ja, i stedet for å klage over at +reglende de har valgt å akseptere blir fulgt? Personlig synes jeg +vilkårene er uakseptable og det ville ikke falle meg inn å gå inn på +en avtale med slike vilkår. I tillegg til uakseptable vilkår er det +mange andre grunner til å unngå Facebook. Du kan finne en solid +gjennomgang av flere slike argumenter hos +<a href="https://stallman.org/facebook.html">Richard Stallmans side om +Facebook</a>. + +<p>Jeg håper flere norske redaktører på samme vis må stå med lua i +hånden inntil de forstår at de selv er med på å føre samfunnet på +ville veier ved å omfavne Facebook slik de gjør når de omtaler og +løfter frem saker fra Facebook, og tar i bruk Facebook som +distribusjonskanal for sine nyheter. De bidrar til +overvåkningssamfunnet og raderer ut lesernes privatsfære når de lenker +til Facebook på sine sider, og låser seg selv inne i en omgivelse der +det er Facebook, og ikke redaktøren, som sitter med makta.</p> + +<p>Men det vil nok ta tid, i et Norge der de fleste nettredaktører +<a href="http://people.skolelinux.org/pere/blog/Snurpenot_overv_kning_av_sensitiv_personinformasjon.html">deler +sine leseres personopplysinger med utenlands etterretning</a>.</p> + +<p>For øvrig burde varsleren Edward Snowden få politisk asyl i +Norge.</p> - Creepy, visualise geotagged social media information - nice free software - http://people.skolelinux.org/pere/blog/Creepy__visualise_geotagged_social_media_information___nice_free_software.html - http://people.skolelinux.org/pere/blog/Creepy__visualise_geotagged_social_media_information___nice_free_software.html - Sun, 24 Jan 2016 10:50:00 +0100 - <p>Most people seem not to realise that every time they walk around -with the computerised radio beacon known as a mobile phone their -position is tracked by the phone company and often stored for a long -time (like every time a SMS is received or sent). And if their -computerised radio beacon is capable of running programs (often called -mobile apps) downloaded from the Internet, these programs are often -also capable of tracking their location (if the app requested access -during installation). And when these programs send out information to -central collection points, the location is often included, unless -extra care is taken to not send the location. The provided -information is used by several entities, for good and bad (what is -good and bad, depend on your point of view). What is certain, is that -the private sphere and the right to free movement is challenged and -perhaps even eradicated for those announcing their location this way, -when they share their whereabouts with private and public -entities.</p> - -<p align="center"><img width="70%" src="http://people.skolelinux.org/pere/blog/images/2016-01-24-nice-creepy-desktop-window.png"></p> - -<p>The phone company logs provide a register of locations to check out -when one want to figure out what the tracked person was doing. It is -unavailable for most of us, but provided to selected government -officials, company staff, those illegally buying information from -unfaithful servants and crackers stealing the information. But the -public information can be collected and analysed, and a free software -tool to do so is called -<a href="http://www.geocreepy.com/">Creepy or Cree.py</a>. I -discovered it when I read -<a href="http://www.aftenposten.no/kultur/Slik-kan-du-bli-overvaket-pa-Twitter-og-Instagram-uten-a-ane-det-7787884.html">an -article about Creepy</a> in the Norwegian newspaper Aftenposten i -November 2014, and decided to check if it was available in Debian. -The python program was in Debian, but -<a href="https://tracker.debian.org/pkg/creepy">the version in -Debian</a> was completely broken and practically unmaintained. I -uploaded a new version which did not work quite right, but did not -have time to fix it then. This Christmas I decided to finally try to -get Creepy operational in Debian. Now a fixed version is available in -Debian unstable and testing, and almost all Debian specific patches -are now included -<a href="https://github.com/jkakavas/creepy">upstream</a>.</p> - -<p>The Creepy program visualises geolocation information fetched from -Twitter, Instagram, Flickr and Google+, and allow one to get a -complete picture of every social media message posted recently in a -given area, or track the movement of a given individual across all -these services. Earlier it was possible to use the search API of at -least some of these services without identifying oneself, but these -days it is impossible. This mean that to use Creepy, you need to -configure it to log in as yourself on these services, and provide -information to them about your search interests. This should be taken -into account when using Creepy, as it will also share information -about yourself with the services.</p> - -<p>The picture above show the twitter messages sent from (or at least -geotagged with a position from) the city centre of Oslo, the capital -of Norway. One useful way to use Creepy is to first look at -information tagged with an area of interest, and next look at all the -information provided by one or more individuals who was in the area. -I tested it by checking out which celebrity provide their location in -twitter messages by checkout out who sent twitter messages near a -Norwegian TV station, and next could track their position over time, -making it possible to locate their home and work place, among other -things. A similar technique have been -<a href="http://www.buzzfeed.com/maxseddon/does-this-soldiers-instagram-account-prove-russia-is-covertl">used -to locate Russian soldiers in Ukraine</a>, and it is both a powerful -tool to discover lying governments, and a useful tool to help people -understand the value of the private information they provide to the -public.</p> - -<p>The package is not trivial to backport to Debian Stable/Jessie, as -it depend on several python modules currently missing in Jessie (at -least python-instagram, python-flickrapi and -python-requests-toolbelt).</p> - -<p>(I have uploaded -<a href="https://screenshots.debian.net/package/creepy">the image to -screenshots.debian.net</a> and licensed it under the same terms as the -Creepy program in Debian.)</p> + E-tjenesten ber om innsyn i eposten til partiene på Stortinget + http://people.skolelinux.org/pere/blog/E_tjenesten_ber_om_innsyn_i_eposten_til_partiene_p__Stortinget.html + http://people.skolelinux.org/pere/blog/E_tjenesten_ber_om_innsyn_i_eposten_til_partiene_p__Stortinget.html + Tue, 6 Sep 2016 23:00:00 +0200 + <p>I helga kom det et hårreisende forslag fra Lysne II-utvalget satt +ned av Forsvarsdepartementet. Lysne II-utvalget var bedt om å vurdere +ønskelista til Forsvarets etterretningstjeneste (e-tjenesten), og har +kommet med +<a href="http://www.aftenposten.no/norge/Utvalg-sier-ja-til-at-E-tjenesten-far-overvake-innholdet-i-all-internett--og-telefontrafikk-som-krysser-riksgrensen-603232b.html">forslag +om at e-tjenesten skal få lov til a avlytte all Internett-trafikk</a> +som passerer Norges grenser. Få er klar over at dette innebærer at +e-tjenesten får tilgang til epost sendt til de fleste politiske +partiene på Stortinget. Regjeringspartiet Høyre (@hoyre.no), +støttepartiene Venstre (@venstre.no) og Kristelig Folkeparti (@krf.no) +samt Sosialistisk Ventreparti (@sv.no) og Miljøpartiet de grønne +(@mdg.no) har nemlig alle valgt å ta imot eposten sin via utenlandske +tjenester. Det betyr at hvis noen sender epost til noen med en slik +adresse vil innholdet i eposten, om dette forslaget blir vedtatt, gjøres +tilgjengelig for e-tjenesten. Venstre, Sosialistisk Ventreparti og +Miljøpartiet De Grønne har valgt å motta sin epost hos Google, +Kristelig Folkeparti har valgt å motta sin epost hos Microsoft, og +Høyre har valgt å motta sin epost hos Comendo med mottak i Danmark og +Irland. Kun Arbeiderpartiet og Fremskrittspartiet har valgt å motta +eposten sin i Norge, hos henholdsvis Intility AS og Telecomputing +AS.</p> + +<p>Konsekvensen er at epost inn og ut av de politiske organisasjonene, +til og fra partimedlemmer og partiets tillitsvalgte vil gjøres +tilgjengelig for e-tjenesten for analyse og sortering. Jeg mistenker +at kunnskapen som slik blir tilgjengelig vil være nyttig hvis en +ønsker å vite hvilke argumenter som treffer publikum når en ønsker å +påvirke Stortingets representanter.</p + +<p>Ved hjelp av MX-oppslag i DNS for epost-domene, tilhørende +whois-oppslag av IP-adressene og traceroute for å se hvorvidt +trafikken går via utlandet kan enhver få bekreftet at epost sendt til +de omtalte partiene vil gjøres tilgjengelig for forsvarets +etterretningstjeneste hvis forslaget blir vedtatt. En kan også bruke +den kjekke nett-tjenesten <a href="http://ipinfo.io/">ipinfo.io</a> +for å få en ide om hvor i verden en IP-adresse hører til.</p> + +<p>På den positive siden vil forslaget gjøre at enda flere blir +motivert til å ta grep for å bruke +<a href="https://www.torproject.org/">Tor</a> og krypterte +kommunikasjonsløsninger for å kommunisere med sine kjære, for å sikre +at privatsfæren vernes. Selv bruker jeg blant annet +<a href="https://www.freedomboxfoundation.org/">FreedomBox</a> og +<a href="https://whispersystems.org/">Signal</a> til slikt. Ingen av +dem er optimale, men de fungerer ganske bra allerede og øker kostnaden +for dem som ønsker å invadere mitt privatliv.</p> + +<p>For øvrig burde varsleren Edward Snowden få politisk asyl i +Norge.</p> + +<!-- + +venstre.no + venstre.no mail is handled by 10 aspmx.l.google.com. + venstre.no mail is handled by 20 alt1.aspmx.l.google.com. + venstre.no mail is handled by 20 alt2.aspmx.l.google.com. + venstre.no mail is handled by 30 aspmx2.googlemail.com. + venstre.no mail is handled by 30 aspmx3.googlemail.com. + +traceroute to aspmx.l.google.com (173.194.222.27), 30 hops max, 60 byte packets + 1 uio-gw10.uio.no (129.240.6.1) 0.411 ms 0.438 ms 0.536 ms + 2 uio-gw8.uio.no (129.240.24.229) 0.375 ms 0.452 ms 0.548 ms + 3 oslo-gw1.uninett.no (128.39.65.17) 1.940 ms 1.950 ms 1.942 ms + 4 se-tug.nordu.net (109.105.102.108) 6.910 ms 6.949 ms 7.283 ms + 5 google-gw.nordu.net (109.105.98.6) 6.975 ms 6.967 ms 6.958 ms + 6 209.85.250.192 (209.85.250.192) 7.337 ms 7.286 ms 10.890 ms + 7 209.85.254.13 (209.85.254.13) 7.394 ms 209.85.254.31 (209.85.254.31) 7.586 ms 209.85.254.33 (209.85.254.33) 7.570 ms + 8 209.85.251.255 (209.85.251.255) 15.686 ms 209.85.249.229 (209.85.249.229) 16.118 ms 209.85.251.255 (209.85.251.255) 16.073 ms + 9 74.125.37.255 (74.125.37.255) 16.794 ms 216.239.40.248 (216.239.40.248) 16.113 ms 74.125.37.44 (74.125.37.44) 16.764 ms +10 * * * + +mdg.no + mdg.no mail is handled by 1 aspmx.l.google.com. + mdg.no mail is handled by 5 alt2.aspmx.l.google.com. + mdg.no mail is handled by 5 alt1.aspmx.l.google.com. + mdg.no mail is handled by 10 aspmx2.googlemail.com. + mdg.no mail is handled by 10 aspmx3.googlemail.com. +sv.no + sv.no mail is handled by 1 aspmx.l.google.com. + sv.no mail is handled by 5 alt1.aspmx.l.google.com. + sv.no mail is handled by 5 alt2.aspmx.l.google.com. + sv.no mail is handled by 10 aspmx3.googlemail.com. + sv.no mail is handled by 10 aspmx2.googlemail.com. +hoyre.no + hoyre.no mail is handled by 10 hoyre-no.mx1.comendosystems.com. + hoyre.no mail is handled by 20 hoyre-no.mx2.comendosystems.net. + +traceroute to hoyre-no.mx1.comendosystems.com (89.104.206.4), 30 hops max, 60 byte packets + 1 uio-gw10.uio.no (129.240.6.1) 0.450 ms 0.510 ms 0.591 ms + 2 uio-gw8.uio.no (129.240.24.229) 0.383 ms 0.508 ms 0.596 ms + 3 oslo-gw1.uninett.no (128.39.65.17) 0.311 ms 0.315 ms 0.300 ms + 4 se-tug.nordu.net (109.105.102.108) 6.837 ms 6.842 ms 6.834 ms + 5 dk-uni.nordu.net (109.105.97.10) 26.073 ms 26.085 ms 26.076 ms + 6 dix.1000m.soeborg.ip.comendo.dk (192.38.7.22) 15.372 ms 15.046 ms 15.123 ms + 7 89.104.192.65 (89.104.192.65) 15.875 ms 15.990 ms 16.239 ms + 8 89.104.192.179 (89.104.192.179) 15.676 ms 15.674 ms 15.664 ms + 9 03dm-com.mx1.staysecuregroup.com (89.104.206.4) 15.637 ms * * + +krf.no + krf.no mail is handled by 10 krf-no.mail.protection.outlook.com. + +traceroute to krf-no.mail.protection.outlook.com (213.199.154.42), 30 hops max, 60 byte packets + 1 uio-gw10.uio.no (129.240.6.1) 0.401 ms 0.438 ms 0.536 ms + 2 uio-gw8.uio.no (129.240.24.229) 11.076 ms 11.120 ms 11.204 ms + 3 oslo-gw1.uninett.no (128.39.65.17) 0.232 ms 0.234 ms 0.271 ms + 4 se-tug.nordu.net (109.105.102.108) 6.811 ms 6.820 ms 6.815 ms + 5 netnod-ix-ge-a-sth-4470.microsoft.com (195.245.240.181) 7.074 ms 7.013 ms 7.061 ms + 6 ae1-0.sto-96cbe-1b.ntwk.msn.net (104.44.225.161) 7.227 ms 7.362 ms 7.293 ms + 7 be-8-0.ibr01.ams.ntwk.msn.net (104.44.5.7) 41.993 ms 43.334 ms 41.939 ms + 8 be-1-0.ibr02.ams.ntwk.msn.net (104.44.4.214) 43.153 ms 43.507 ms 43.404 ms + 9 ae3-0.fra-96cbe-1b.ntwk.msn.net (104.44.5.17) 29.897 ms 29.831 ms 29.794 ms +10 ae10-0.vie-96cbe-1a.ntwk.msn.net (198.206.164.1) 42.309 ms 42.130 ms 41.808 ms +11 * ae8-0.vie-96cbe-1b.ntwk.msn.net (104.44.227.29) 41.425 ms * +12 * * * + +arbeiderpartiet.no + arbeiderpartiet.no mail is handled by 10 mail.intility.com. + arbeiderpartiet.no mail is handled by 20 mail2.intility.com. + +traceroute to mail.intility.com (188.95.245.87), 30 hops max, 60 byte packets + 1 uio-gw10.uio.no (129.240.6.1) 0.486 ms 0.508 ms 0.649 ms + 2 uio-gw8.uio.no (129.240.24.229) 0.416 ms 0.508 ms 0.620 ms + 3 oslo-gw1.uninett.no (128.39.65.17) 0.276 ms 0.278 ms 0.275 ms + 4 te3-1-2.br1.fn3.as2116.net (193.156.90.3) 0.374 ms 0.371 ms 0.416 ms + 5 he16-1-1.cr1.san110.as2116.net (195.0.244.234) 3.132 ms he16-1-1.cr2.oslosda310.as2116.net (195.0.244.48) 10.079 ms he16-1-1.cr1.san110.as2116.net (195.0.244.234) 3.353 ms + 6 te1-2-0.ar2.ulv89.as2116.net (195.0.243.194) 0.569 ms te5-0-0.ar2.ulv89.as2116.net (195.0.243.192) 0.661 ms 0.653 ms + 7 cD2EC45C1.static.as2116.net (193.69.236.210) 0.654 ms 0.615 ms 0.590 ms + 8 185.7.132.38 (185.7.132.38) 1.661 ms 1.808 ms 1.695 ms + 9 185.7.132.100 (185.7.132.100) 1.793 ms 1.943 ms 1.546 ms +10 * * * + +frp.no + frp.no mail is handled by 10 mx03.telecomputing.no. + frp.no mail is handled by 20 mx01.telecomputing.no. + +traceroute to mx03.telecomputing.no (95.128.105.102), 30 hops max, 60 byte packets + 1 uio-gw10.uio.no (129.240.6.1) 0.378 ms 0.402 ms 0.479 ms + 2 uio-gw8.uio.no (129.240.24.229) 0.361 ms 0.458 ms 0.548 ms + 3 oslo-gw1.uninett.no (128.39.65.17) 0.361 ms 0.352 ms 0.336 ms + 4 xe-2-2-0-0.san-peer2.osl.no.ip.tdc.net (193.156.90.16) 0.375 ms 0.366 ms 0.346 ms + 5 xe-2-0-2-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.97) 0.780 ms xe-2-0-0-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.101) 0.713 ms xe-2-0-2-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.97) 0.759 ms + 6 cpe.xe-0-2-0-100.ost-pe1.osl.no.customer.tdc.net (85.19.26.46) 0.837 ms 0.755 ms 0.759 ms + 7 95.128.105.3 (95.128.105.3) 1.050 ms 1.288 ms 1.182 ms + 8 mx03.telecomputing.no (95.128.105.102) 0.717 ms 0.703 ms 0.692 ms + +--> - Always download Debian packages using Tor - the simple recipe - http://people.skolelinux.org/pere/blog/Always_download_Debian_packages_using_Tor___the_simple_recipe.html - http://people.skolelinux.org/pere/blog/Always_download_Debian_packages_using_Tor___the_simple_recipe.html - Fri, 15 Jan 2016 00:30:00 +0100 - <p>During his DebConf15 keynote, Jacob Appelbaum -<a href="https://summit.debconf.org/debconf15/meeting/331/what-is-to-be-done/">observed -that those listening on the Internet lines would have good reason to -believe a computer have a given security hole</a> if it download a -security fix from a Debian mirror. This is a good reason to always -use encrypted connections to the Debian mirror, to make sure those -listening do not know which IP address to attack. In August, Richard -Hartmann observed that encryption was not enough, when it was possible -to interfere download size to security patches or the fact that -download took place shortly after a security fix was released, and -<a href="http://richardhartmann.de/blog/posts/2015/08/24-Tor-enabled_Debian_mirror/">proposed -to always use Tor to download packages from the Debian mirror</a>. He -was not the first to propose this, as the -<tt><a href="https://tracker.debian.org/pkg/apt-transport-tor">apt-transport-tor</a></tt> -package by Tim Retout already existed to make it easy to convince apt -to use <a href="https://www.torproject.org/">Tor</a>, but I was not -aware of that package when I read the blog post from Richard.</p> - -<p>Richard discussed the idea with Peter Palfrader, one of the Debian -sysadmins, and he set up a Tor hidden service on one of the central -Debian mirrors using the address vwakviie2ienjx6t.onion, thus making -it possible to download packages directly between two tor nodes, -making sure the network traffic always were encrypted.</p> - -<p>Here is a short recipe for enabling this on your machine, by -installing <tt>apt-transport-tor</tt> and replacing http and https -urls with tor+http and tor+https, and using the hidden service instead -of the official Debian mirror site. I recommend installing -<tt>etckeeper</tt> before you start to have a history of the changes -done in /etc/.</p> - -<blockquote><pre> -apt install apt-transport-tor -sed -i 's% http://ftp.debian.org/%tor+http://vwakviie2ienjx6t.onion/%' /etc/apt/sources.list -sed -i 's% http% tor+http%' /etc/apt/sources.list -</pre></blockquote> - -<p>If you have more sources listed in /etc/apt/sources.list.d/, run -the sed commands for these too. The sed command is assuming your are -using the ftp.debian.org Debian mirror. Adjust the command (or just -edit the file manually) to match your mirror.</p> - -<p>This work in Debian Jessie and later. Note that tools like -<tt>apt-file</tt> only recently started using the apt transport -system, and do not work with these tor+http URLs. For -<tt>apt-file</tt> you need the version currently in experimental, -which need a recent apt version currently only in unstable. So if you -need a working <tt>apt-file</tt>, this is not for you.</p> - -<p>Another advantage from this change is that your machine will start -using Tor regularly and at fairly random intervals (every time you -update the package lists or upgrade or install a new package), thus -masking other Tor traffic done from the same machine. Using Tor will -become normal for the machine in question.</p> - -<p>On <a href="https://wiki.debian.org/FreedomBox">Freedombox</a>, APT -is set up by default to use <tt>apt-transport-tor</tt> when Tor is -enabled. It would be great if it was the default on any Debian -system.</p> + First draft Norwegian Bokmål edition of The Debian Administrator's Handbook now public + http://people.skolelinux.org/pere/blog/First_draft_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook_now_public.html + http://people.skolelinux.org/pere/blog/First_draft_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook_now_public.html + Tue, 30 Aug 2016 10:10:00 +0200 + <p>In April we +<a href="http://people.skolelinux.org/pere/blog/Lets_make_a_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook.html">started +to work</a> on a Norwegian Bokmål edition of the "open access" book on +how to set up and administrate a Debian system. Today I am happy to +report that the first draft is now publicly available. You can find +it on <a href="https://debian-handbook.info/get/">get the Debian +Administrator's Handbook page</a> (under Other languages). The first +eight chapters have a first draft translation, and we are working on +proofreading the content. If you want to help out, please start +contributing using +<a href="https://hosted.weblate.org/projects/debian-handbook/">the +hosted weblate project page</a>, and get in touch using +<a href="http://lists.alioth.debian.org/mailman/listinfo/debian-handbook-translators">the +translators mailing list</a>. Please also check out +<a href="https://debian-handbook.info/contribute/">the instructions for +contributors</a>. A good way to contribute is to proofread the text +and update weblate if you find errors.</p> + +<p>Our goal is still to make the Norwegian book available on paper as well as +electronic form.</p> - Nedlasting fra NRK, som Matroska med undertekster - http://people.skolelinux.org/pere/blog/Nedlasting_fra_NRK__som_Matroska_med_undertekster.html - http://people.skolelinux.org/pere/blog/Nedlasting_fra_NRK__som_Matroska_med_undertekster.html - Sat, 2 Jan 2016 13:50:00 +0100 - <p>Det kommer stadig nye løsninger for å ta lagre unna innslag fra NRK -for å se på det senere. For en stund tilbake kom jeg over et script -nrkopptak laget av Ingvar Hagelund. Han fjernet riktignok sitt script -etter forespørsel fra Erik Bolstad i NRK, men noen tok heldigvis og -gjorde det <a href="https://github.com/liangqi/nrkopptak">tilgjengelig -via github</a>.</p> - -<p>Scriptet kan lagre som MPEG4 eller Matroska, og bake inn -undertekster i fila på et vis som blant annet VLC forstår. For å -bruke scriptet, kopier ned git-arkivet og kjør</p> - -<p><pre> -nrkopptak/bin/nrk-opptak k <ahref="https://tv.nrk.no/serie/bmi-turne/MUHH45000115/sesong-1/episode-1">https://tv.nrk.no/serie/bmi-turne/MUHH45000115/sesong-1/episode-1</a> -</pre></p> - -<p>URL-eksemplet er dagens toppsak på tv.nrk.no. Argument 'k' ber -scriptet laste ned og lagre som Matroska. Det finnes en rekke andre -muligheter for valg av kvalitet og format.</p> - -<p>Jeg foretrekker dette scriptet fremfor youtube-dl, som -<a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html"> -nevnt i 2014 støtter NRK</a> og en rekke andre videokilder, på grunn -av at nrkopptak samler undertekster og video i en enkelt fil, hvilket -gjør håndtering enklere på disk.</p> + Coz can help you find bottlenecks in multi-threaded software - nice free software + http://people.skolelinux.org/pere/blog/Coz_can_help_you_find_bottlenecks_in_multi_threaded_software___nice_free_software.html + http://people.skolelinux.org/pere/blog/Coz_can_help_you_find_bottlenecks_in_multi_threaded_software___nice_free_software.html + Thu, 11 Aug 2016 12:00:00 +0200 + <p>This summer, I read a great article +"<a href="https://www.usenix.org/publications/login/summer2016/curtsinger">coz: +This Is the Profiler You're Looking For</a>" in USENIX ;login: about +how to profile multi-threaded programs. It presented a system for +profiling software by running experiences in the running program, +testing how run time performance is affected by "speeding up" parts of +the code to various degrees compared to a normal run. It does this by +slowing down parallel threads while the "faster up" code is running +and measure how this affect processing time. The processing time is +measured using probes inserted into the code, either using progress +counters (COZ_PROGRESS) or as latency meters (COZ_BEGIN/COZ_END). It +can also measure unmodified code by measuring complete the program +runtime and running the program several times instead.</p> + +<p>The project and presentation was so inspiring that I would like to +get the system into Debian. I +<a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830708">created +a WNPP request for it</a> and contacted upstream to try to make the +system ready for Debian by sending patches. The build process need to +be changed a bit to avoid running 'git clone' to get dependencies, and +to include the JavaScript web page used to visualize the collected +profiling information included in the source package. +But I expect that should work out fairly soon.</p> + +<p>The way the system work is fairly simple. To run an coz experiment +on a binary with debug symbols available, start the program like this: + +<p><blockquote><pre> +coz run --- program-to-run +</pre></blockquote></p> + +<p>This will create a text file profile.coz with the instrumentation +information. To show what part of the code affect the performance +most, use a web browser and either point it to +<a href="http://plasma-umass.github.io/coz/">http://plasma-umass.github.io/coz/</a> +or use the copy from git (in the gh-pages branch). Check out this web +site to have a look at several example profiling runs and get an idea what the end result from the profile runs look like. To make the +profiling more useful you include &lt;coz.h&gt; and insert the +COZ_PROGRESS or COZ_BEGIN and COZ_END at appropriate places in the +code, rebuild and run the profiler. This allow coz to do more +targeted experiments.</p> + +<p>A video published by ACM +<a href="https://www.youtube.com/watch?v=jE0V-p1odPg">presenting the +Coz profiler</a> is available from Youtube. There is also a paper +from the 25th Symposium on Operating Systems Principles available +titled +<a href="https://www.usenix.org/conference/atc16/technical-sessions/presentation/curtsinger">Coz: +finding code that counts with causal profiling</a>.</p> + +<p><a href="https://github.com/plasma-umass/coz">The source code</a> +for Coz is available from github. It will only build with clang +because it uses a +<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55606">C++ +feature missing in GCC</a>, but I've submitted +<a href="https://github.com/plasma-umass/coz/pull/67">a patch to solve +it</a> and hope it will be included in the upstream source soon.</p> + +<p>Please get in touch if you, like me, would like to see this piece +of software in Debian. I would very much like some help with the +packaging effort, as I lack the in depth knowledge on how to package +C++ libraries.</p> - OpenALPR, find car license plates in video streams - nice free software - http://people.skolelinux.org/pere/blog/OpenALPR__find_car_license_plates_in_video_streams___nice_free_software.html - http://people.skolelinux.org/pere/blog/OpenALPR__find_car_license_plates_in_video_streams___nice_free_software.html - Wed, 23 Dec 2015 01:00:00 +0100 - <p>When I was a kid, we used to collect "car numbers", as we used to -call the car license plate numbers in those days. I would write the -numbers down in my little book and compare notes with the other kids -to see how many region codes we had seen and if we had seen some -exotic or special region codes and numbers. It was a fun game to pass -time, as we kids have plenty of it.</p> - -<p>A few days I came across -<a href="https://github.com/openalpr/openalpr">the OpenALPR -project</a>, a free software project to automatically discover and -report license plates in images and video streams, and provide the -"car numbers" in a machine readable format. I've been looking for -such system for a while now, because I believe it is a bad idea that the -<a href="https://en.wikipedia.org/wiki/Automatic_number_plate_recognition">automatic -number plate recognition</a> tool only is available in the hands of -the powerful, and want it to be available also for the powerless to -even the score when it comes to surveillance and sousveillance. I -discovered the developer -<a href="https://bugs.debian.org/747509">wanted to get the tool into -Debian</a>, and as I too wanted it to be in Debian, I volunteered to -help him get it into shape to get the package uploaded into the Debian -archive.</p> - -<p>Today we finally managed to get the package into shape and uploaded -it into Debian, where it currently -<a href="https://ftp-master.debian.org//new/openalpr_2.2.1-1.html">waits -in the NEW queue</a> for review by the Debian ftpmasters.</p> - -<p>I guess you are wondering why on earth such tool would be useful -for the common folks, ie those not running a large government -surveillance system? Well, I plan to put it in a computer on my bike -and in my car, tracking the cars nearby and allowing me to be notified -when number plates on my watch list are discovered. Another use case -was suggested by a friend of mine, who wanted to set it up at his home -to open the car port automatically when it discovered the plate on his -car. When I mentioned it perhaps was a bit foolhardy to allow anyone -capable of placing his license plate number of a piece of cardboard to -open his car port, men replied that it was always unlocked anyway. I -guess for such use case it make sense. I am sure there are other use -cases too, for those with imagination and a vision.</p> - -<p>If you want to build your own version of the Debian package, check -out the upstream git source and symlink ./distros/debian to ./debian/ -before running "debuild" to build the source. Or wait a bit until the -package show up in unstable.</p> + Sales number for the Free Culture translation, first half of 2016 + http://people.skolelinux.org/pere/blog/Sales_number_for_the_Free_Culture_translation__first_half_of_2016.html + http://people.skolelinux.org/pere/blog/Sales_number_for_the_Free_Culture_translation__first_half_of_2016.html + Fri, 5 Aug 2016 22:45:00 +0200 + <p>As my regular readers probably remember, the last year I published +a French and Norwegian translation of the classic +<a href="http://www.free-culture.cc/">Free Culture book</a> by the +founder of the Creative Commons movement, Lawrence Lessig. A bit less +known is the fact that due to the way I created the translations, +using docbook and po4a, I also recreated the English original. And +because I already had created a new the PDF edition, I published it +too. The revenue from the books are sent to the Creative Commons +Corporation. In other words, I do not earn any money from this +project, I just earn the warm fuzzy feeling that the text is available +for a wider audience and more people can learn why the Creative +Commons is needed.</p> + +<p>Today, just for fun, I had a look at the sales number over at +Lulu.com, which take care of payment, printing and shipping. Much to +my surprise, the English edition is selling better than both the +French and Norwegian edition, despite the fact that it has been +available in English since it was first published. In total, 24 paper +books was sold for USD $19.99 between 2016-01-01 and 2016-07-31:</p> + +<table border="0"> +<tr><th>Title / language</th><th>Quantity</th></tr> +<tr><td><a href="http://www.lulu.com/shop/lawrence-lessig/culture-libre/paperback/product-22645082.html">Culture Libre / French</a></td><td align="right">3</td></tr> +<tr><td><a href="http://www.lulu.com/shop/lawrence-lessig/fri-kultur/paperback/product-22441576.html">Fri kultur / Norwegian</a></td><td align="right">7</td></tr> +<tr><td><a href="http://www.lulu.com/shop/lawrence-lessig/free-culture/paperback/product-22440520.html">Free Culture / English</a></td><td align="right">14</td></tr> +</table> + +<p>The books are available both from Lulu.com and from large book +stores like Amazon and Barnes&Noble. Most revenue, around $10 per +book, is sent to the Creative Commons project when the book is sold +directly by Lulu.com. The other channels give less revenue. The +summary from Lulu tell me 10 books was sold via the Amazon channel, 10 +via Ingram (what is this?) and 4 directly by Lulu. And Lulu.com tells +me that the revenue sent so far this year is USD $101.42. No idea +what kind of sales numbers to expect, so I do not know if that is a +good amount of sales for a 10 year old book or not. But it make me +happy that the buyers find the book, and I hope they enjoy reading it +as much as I did.</p> + +<p>The ebook edition is available for free from +<a href="https://github.com/petterreinholdtsen/free-culture-lessig">Github</a>.</p> + +<p>If you would like to translate and publish the book in your native +language, I would be happy to help make it happen. Please get in +touch.</p> - Using appstream with isenkram to install hardware related packages in Debian - http://people.skolelinux.org/pere/blog/Using_appstream_with_isenkram_to_install_hardware_related_packages_in_Debian.html - http://people.skolelinux.org/pere/blog/Using_appstream_with_isenkram_to_install_hardware_related_packages_in_Debian.html - Sun, 20 Dec 2015 12:20:00 +0100 - <p>Around three years ago, I created -<a href="http://packages.qa.debian.org/isenkram">the isenkram -system</a> to get a more practical solution in Debian for handing -hardware related packages. A GUI system in the isenkram package will -present a pop-up dialog when some hardware dongle supported by -relevant packages in Debian is inserted into the machine. The same -lookup mechanism to detect packages is available as command line -tools in the isenkram-cli package. In addition to mapping hardware, -it will also map kernel firmware files to packages and make it easy to -install needed firmware packages automatically. The key for this -system to work is a good way to map hardware to packages, in other -words, allow packages to announce what hardware they will work -with.</p> - -<p>I started by providing data files in the isenkram source, and -adding code to download the latest version of these data files at run -time, to ensure every user had the most up to date mapping available. -I also added support for storing the mapping in the Packages file in -the apt repositories, but did not push this approach because while I -was trying to figure out how to best store hardware/package mappings, -<a href="http://www.freedesktop.org/software/appstream/docs/">the -appstream system</a> was announced. I got in touch and suggested to -add the hardware mapping into that data set to be able to use -appstream as a data source, and this was accepted at least for the -Debian version of appstream.</p> - -<p>A few days ago using appstream in Debian for this became possible, -and today I uploaded a new version 0.20 of isenkram adding support for -appstream as a data source for mapping hardware to packages. The only -package so far using appstream to announce its hardware support is my -pymissile package. I got help from Matthias Klumpp with figuring out -how do add the required -<a href="https://appstream.debian.org/html/sid/main/metainfo/pymissile.html">metadata -in pymissile</a>. I added a file debian/pymissile.metainfo.xml with -this content:</p> - -<blockquote><pre> -&lt;?xml version="1.0" encoding="UTF-8"?&gt; -&lt;component&gt; - &lt;id&gt;pymissile&lt;/id&gt; - &lt;metadata_license&gt;MIT&lt;/metadata_license&gt; - &lt;name&gt;pymissile&lt;/name&gt; - &lt;summary&gt;Control original Striker USB Missile Launcher&lt;/summary&gt; - &lt;description&gt; - &lt;p&gt; - Pymissile provides a curses interface to control an original - Marks and Spencer / Striker USB Missile Launcher, as well as a - motion control script to allow a webcamera to control the - launcher. - &lt;/p&gt; - &lt;/description&gt; - &lt;provides&gt; - &lt;modalias&gt;usb:v1130p0202d*&lt;/modalias&gt; - &lt;/provides&gt; -&lt;/component&gt; -</pre></blockquote> - -<p>The key for isenkram is the component/provides/modalias value, -which is a glob style match rule for hardware specific strings -(modalias strings) provided by the Linux kernel. In this case, it -will map to all USB devices with vendor code 1130 and product code -0202.</p> - -<p>Note, it is important that the license of all the metadata files -are compatible to have permissions to aggregate them into archive wide -appstream files. Matthias suggested to use MIT or BSD licenses for -these files. A challenge is figuring out a good id for the data, as -it is supposed to be globally unique and shared across distributions -(in other words, best to coordinate with upstream what to use). But -it can be changed later or, so we went with the package name as -upstream for this project is dormant.</p> - -<p>To get the metadata file installed in the correct location for the -mirror update scripts to pick it up and include its content the -appstream data source, the file must be installed in the binary -package under /usr/share/appdata/. I did this by adding the following -line to debian/pymissile.install:</p> - -<blockquote><pre> -debian/pymissile.metainfo.xml usr/share/appdata -</pre></blockquote> - -<p>With that in place, the command line tool isenkram-lookup will list -all packages useful on the current computer automatically, and the GUI -pop-up handler will propose to install the package not already -installed if a hardware dongle is inserted into the machine in -question.</p> - -<p>Details of the modalias field in appstream is available from the -<a href="https://wiki.debian.org/DEP-11">DEP-11</a> proposal.</p> - -<p>To locate the modalias values of all hardware present in a machine, -try running this command on the command line:</p> - -<blockquote><pre> -cat $(find /sys/devices/|grep modalias) -</pre></blockquote> - -<p>To learn more about the isenkram system, please check out -<a href="http://people.skolelinux.org/pere/blog/tags/isenkram/">my -blog posts tagged isenkram</a>.</p> + Vitenskapen tar som vanlig feil igjen - relativt feil + http://people.skolelinux.org/pere/blog/Vitenskapen_tar_som_vanlig_feil_igjen___relativt_feil.html + http://people.skolelinux.org/pere/blog/Vitenskapen_tar_som_vanlig_feil_igjen___relativt_feil.html + Mon, 1 Aug 2016 16:00:00 +0200 + <p>For mange år siden leste jeg en klassisk tekst som gjorde såpass +inntrykk på meg at jeg husker den fortsatt, flere år senere, og bruker +argumentene fra den stadig vekk. Teksten var «The Relativity of +Wrong» som Isaac Asimov publiserte i Skeptical Inquirer i 1989. Den +gir litt perspektiv rundt formidlingen av vitenskapelige resultater. +Jeg har hatt lyst til å kunne dele den også med folk som ikke +behersker engelsk så godt, som barn og noen av mine eldre slektninger, +og har savnet å ha den tilgjengelig på norsk. For to uker siden tok +jeg meg sammen og kontaktet Asbjørn Dyrendal i foreningen Skepsis om +de var interessert i å publisere en norsk utgave på bloggen sin, og da +han var positiv tok jeg kontakt med Skeptical Inquirer og spurte om +det var greit for dem. I løpet av noen dager fikk vi tilbakemelding +fra Barry Karr hos The Skeptical Inquirer som hadde sjekket og fått OK +fra Robyn Asimov som representerte arvingene i Asmiov-familien og gikk +igang med oversettingen.</p> + +<p>Resultatet, <a href="http://www.skepsis.no/?p=1617">«Relativt +feil»</a>, ble publisert på skepsis-bloggen for noen minutter siden. +Jeg anbefaler deg på det varmeste å lese denne teksten og dele den med +dine venner.</p> + +<p>For å håndtere oversettelsen og sikre at original og oversettelse +var i sync brukte vi git, po4a, GNU make og Transifex. Det hele +fungerte utmerket og gjorde det enkelt å dele tekstene og jobbe sammen +om finpuss på formuleringene. Hadde hosted.weblate.org latt meg +opprette nye prosjekter selv i stedet for å måtte kontakte +administratoren der, så hadde jeg brukt weblate i stedet.</p> - Bokhandeldistribusjon av boken Fri kultur av Lawrence Lessig - http://people.skolelinux.org/pere/blog/Bokhandeldistribusjon_av_boken_Fri_kultur_av_Lawrence_Lessig.html - http://people.skolelinux.org/pere/blog/Bokhandeldistribusjon_av_boken_Fri_kultur_av_Lawrence_Lessig.html - Mon, 14 Dec 2015 12:10:00 +0100 - <p><strong>Besøk -<a href="https://www.lulu.com/shop/lawrence-lessig/fri-kultur/paperback/product-22441576.html">lulu.com</a> -eller -<a href="https://www.amazon.com/Fri-kultur-Norwegian-Lawrence-Lessig/dp/8269018236/">Amazon</a> -for å kjøpe boken på papir, eller last ned ebook som -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/archive/freeculture.nb.pdf">PDF</a>, -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/archive/freeculture.nb.epub">ePub</a> -eller -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/archive/freeculture.nb.mobi">MOBI</a> -fra -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/">github</a>.</strong></p> - -<p>Jeg ble gledelig overrasket i dag da jeg oppdaget at boken jeg har -gitt ut -<a href="https://www.amazon.com/Fri-kultur-Norwegian-Lawrence-Lessig/dp/8269018236/">hadde -dukket opp i Amazon</a>. Jeg hadde trodd det skulle ta lenger tid, da -jeg fikk beskjed om at det skulle ta seks til åtte uker. -Amazonoppføringen er et resultat av at jeg for noen uker siden -diskuterte prissetting og håndtering av profitt med forfatteren. Det -måtte avklares da bruksvilkårene til boken har krav om -ikke-kommersiell bruk. Vi ble enige om at overskuddet fra salg av -boken skal sendes til -<a href="https://creativecommons.org/">Creative Commons-stiftelsen</a>. -Med det på plass kunne jeg be -<a href="https://www.lulu.com/shop/lawrence-lessig/fri-kultur/paperback/product-22441576.html">lulu.com</a> -om å gi boken «utvidet» distribusjon. Årsaken til at -bokhandeldistribusjon var litt utfordrende er at bokhandlere krever -mulighet for profitt på bøkene de selger (selvfølgelig), og dermed -måtte de få lov til å selge til høyere pris enn lulu.com. I tillegg -er det krav om samme pris på lulu.com og i bokhandlene, dermed blir -prisen økt også hos lulu.com. Hva skulle jeg gjøre med den profitten -uten å bryte med klausulen om ikkekommersiell? Løsningen var å gi -bort profitten til CC-stiftelsen. Prisen på boken ble nesten -tredoblet, til $19.99 (ca. 160,-) pluss frakt, men synligheten øker -betraktelig når den kan finnes i katalogene til store nettbokhandlere. -Det betyr at hvis du allerede har kjøpt boken har du fått den veldig -billig, og kjøper du den nå, får du den fortsatt billig samt donerer i -tillegg noen tiere til fremme av Creative Commons.</p> - -<p>Mens jeg var i gang med å titte etter informasjon om boken -oppdaget jeg at den også var dukket opp på -<a href="https://books.google.no/books?id=uKUGCwAAQBAJ">Google -Books</a>, der en kan lese den på web. PDF-utgaven har ennå ikke -dukket opp hos <a href="https://www.nb.no/">Nasjonalbiblioteket</a>, -men det regner jeg med kommer på plass i løpet av noen uker. Boken er -heller ikke dukket opp hos -<a href="https://www.barnesandnoble.com/">Barnes & Noble</a> ennå, men -jeg antar det bare er et tidsspørsmål før dette er på plass.</p> - -<p>Boken er dessverre ikke tilgjengelig fra norske bokhandlere, og -kommer neppe til å bli det med det første. Årsaken er at for å få det -til måtte jeg personlig håndtere bestilling av bøker, hvilket jeg ikke -er interessert i å bruke tid på. Jeg kunne betalt ca 2000,- til -<a href="http://www.bokbasen.no/">den norske bokbasen</a>, en felles -database over bøker tilgjengelig for norske bokhandlere, for å få en -oppføring der, men da måtte jeg tatt imot bestillinger på epost og -sendt ut bøker selv. Det ville krevd at jeg var klar til å -sende ut bøker på kort varsel, dvs. holdt meg med ekstra bøker, -konvolutter og frimerker. Bokbasen har visst ikke opplegg for å be -bokhandlene bestille direkte via web, så jeg droppet oppføring der. -Jeg har spurt Haugen bok og Tronsmo direkte på epost om de er -interessert i å ta inn boken i sin bestillingskatalog, men ikke fått -svar, så jeg antar de ikke er interessert. Derimot har jeg fått en -hyggelig henvendelse fra Biblioteksentralen som fortalte at de har -lagt den inn i sin database slik at deres bibliotekskunder enkelt kan -bestille den via dem.</p> - -<p>Boken er i følge -<a href="http://bibsys-almaprimo.hosted.exlibrisgroup.com/primo_library/libweb/action/display.do?tabs=detailsTab&ct=display&fn=search&doc=BIBSYS_ILS71518423420002201&indx=1&recIds=BIBSYS_ILS71518423420002201&recIdxs=0&elementId=0&renderMode=poppedOut&displayMode=full&frbrVersion=&dscnt=0&tab=library_catalogue&dstmp=1448543801124&vl(freeText0)=fri%20kultur&vid=UBO&mode=Basic">Bibsys/Oria</a> -og bokdatabasen til -<a href="https://www.deich.folkebibl.no/cgi-bin/websok?tnr=1819617">Deichmanske</a> -tilgjengelig fra flere biblioteker allerede, og alle eksemplarer er -visst allerede utlånt med ventetid. Det synes jeg er veldig gledelig -å se. Jeg håper mange kommer til å lese boken. Jeg tror den er -spesielt egnet for foreldre og bekjente av oss nerder for å forklare -hva slags problemer vi ser med dagens opphavsrettsregime.</p> + Techno TV broadcasting live across Norway and the Internet (#debconf16, #nuug) on @frikanalen + http://people.skolelinux.org/pere/blog/Techno_TV_broadcasting_live_across_Norway_and_the_Internet___debconf16___nuug__on__frikanalen.html + http://people.skolelinux.org/pere/blog/Techno_TV_broadcasting_live_across_Norway_and_the_Internet___debconf16___nuug__on__frikanalen.html + Mon, 1 Aug 2016 10:30:00 +0200 + <p>Did you know there is a TV channel broadcasting talks from DebConf +16 across an entire country? Or that there is a TV channel +broadcasting talks by or about +<a href="http://beta.frikanalen.no/video/625529/">Linus Torvalds</a>, +<a href="http://beta.frikanalen.no/video/625599/">Tor</a>, +<a href="http://beta.frikanalen.no/video/624019/">OpenID</A>, +<a href="http://beta.frikanalen.no/video/625624/">Common Lisp</a>, +<a href="http://beta.frikanalen.no/video/625446/">Civic Tech</a>, +<a href="http://beta.frikanalen.no/video/625090/">EFF founder John Barlow</a>, +<a href="http://beta.frikanalen.no/video/625432/">how to make 3D +printer electronics</a> and many more fascinating topics? It works +using only free software (all of it +<a href="http://github.com/Frikanalen">available from Github</a>), and +is administrated using a web browser and a web API.</p> + +<p>The TV channel is the Norwegian open channel +<a href="http://www.frikanalen.no/">Frikanalen</a>, and I am involved +via <a href="https://www.nuug.no/">the NUUG member association</a> in +running and developing the software for the channel. The channel is +organised as a member organisation where its members can upload and +broadcast what they want (think of it as Youtube for national +broadcasting television). Individuals can broadcast too. The time +slots are handled on a first come, first serve basis. Because the +channel have almost no viewers and very few active members, we can +experiment with TV technology without too much flack when we make +mistakes. And thanks to the few active members, most of the slots on +the schedule are free. I see this as an opportunity to spread +knowledge about technology and free software, and have a script I run +regularly to fill up all the open slots the next few days with +technology related video. The end result is a channel I like to +describe as Techno TV - filled with interesting talks and +presentations.</p> + +<p>It is available on channel 50 on the Norwegian national digital TV +network (RiksTV). It is also available as a multicast stream on +Uninett. And finally, it is available as +<a href="http://beta.frikanalen.no/">a WebM unicast stream</a> from +Frikanalen and NUUG. Check it out. :)</p> - The GNU General Public License is not magic pixie dust - http://people.skolelinux.org/pere/blog/The_GNU_General_Public_License_is_not_magic_pixie_dust.html - http://people.skolelinux.org/pere/blog/The_GNU_General_Public_License_is_not_magic_pixie_dust.html - Mon, 30 Nov 2015 09:55:00 +0100 - <p>A blog post from my fellow Debian developer Paul Wise titled -"<a href="http://bonedaddy.net/pabs3/log/2015/11/27/sfc-supporter/">The -GPL is not magic pixie dust</a>" explain the importance of making sure -the <a href="http://www.gnu.org/copyleft/gpl.html">GPL</a> is enforced. -I quote the blog post from Paul in full here with his permission:<p> - -<blockquote> - -<p><a href="https://sfconservancy.org/supporter/"><img src="https://sfconservancy.org/img/supporter-badge.png" width="194" height="90" alt="Become a Software Freedom Conservancy Supporter!" align="right" border="0" /></a></p> - -<blockquote> -The GPL is not magic pixie dust. It does not work by itself.<br/> - -The first step is to choose a -<a href="https://copyleft.org/">copyleft</a> license for your -code.<br/> - -The next step is, when someone fails to follow that copyleft license, -<b>it must be enforced</b><br/> - -and its a simple fact of our modern society that such type of -work<br/> - -is incredibly expensive to do and incredibly difficult to do. -</blockquote> - -<p><small>-- <a href="http://ebb.org/bkuhn/">Bradley Kuhn</a>, in -<a href="http://faif.us/" title="Free as in Freedom">FaiF</a> -<a href="http://faif.us/cast/2015/nov/24/0x57/">episode -0x57</a></small></p> - -<p>As the Debian Website -<a href="https://bugs.debian.org/794116">used</a> -<a href="https://anonscm.debian.org/viewvc/webwml/webwml/english/intro/free.wml?r1=1.24&amp;r2=1.25">to</a> -imply, public domain and permissively licensed software can lead to -the production of more proprietary software as people discover useful -software, extend it and or incorporate it into their hardware or -software products. Copyleft licenses such as the GNU GPL were created -to close off this avenue to the production of proprietary software but -such licenses are not enough. With the ongoing adoption of Free -Software by individuals and groups, inevitably the community's -expectations of license compliance are violated, usually out of -ignorance of the way Free Software works, but not always. As Karen -and Bradley explained in <a href="http://faif.us/" title="Free as in -Freedom">FaiF</a> -<a href="http://faif.us/cast/2015/nov/24/0x57/">episode 0x57</a>, -copyleft is nothing if no-one is willing and able to stand up in court -to protect it. The reality of today's world is that legal -representation is expensive, difficult and time consuming. With -<a href="http://gpl-violations.org/">gpl-violations.org</a> in hiatus -<a href="http://gpl-violations.org/news/20151027-homepage-recovers/">until</a> -some time in 2016, the <a href="https://sfconservancy.org/">Software -Freedom Conservancy</a> (a tax-exempt charity) is the major defender -of the Linux project, Debian and other groups against GPL violations. -In March the SFC supported a -<a href="https://sfconservancy.org/news/2015/mar/05/vmware-lawsuit/">lawsuit -by Christoph Hellwig</a> against VMware for refusing to -<a href="https://sfconservancy.org/linux-compliance/vmware-lawsuit-faq.html">comply -with the GPL</a> in relation to their use of parts of the Linux -kernel. Since then two of their sponsors pulled corporate funding and -conferences -<a href="https://sfconservancy.org/blog/2015/nov/24/faif-carols-fundraiser/">blocked -or cancelled their talks</a>. As a result they have decided to rely -less on corporate funding and more on the broad community of -individuals who support Free Software and copyleft. So the SFC has -<a href="https://sfconservancy.org/news/2015/nov/23/2015fundraiser/">launched</a> -a <a href="https://sfconservancy.org/supporter/">campaign</a> to create -a community of folks who stand up for copyleft and the GPL by -supporting their work on promoting and supporting copyleft and Free -Software.</p> - -<p>If you support Free Software, -<a href="https://sfconservancy.org/blog/2015/nov/26/like-what-I-do/">like</a> -what the SFC do, agree with their -<a href="https://sfconservancy.org/linux-compliance/principles.html">compliance -principles</a>, are happy about their -<a href="https://sfconservancy.org/supporter/">successes</a> in 2015, -work on a project that is an SFC -<a href="https://sfconservancy.org/members/current/">member</a> and or -just want to stand up for copyleft, please join -<a href="https://identi.ca/cwebber/image/JQGPA4qbTyyp3-MY8QpvuA">Christopher -Allan Webber</a>, -<a href="https://sfconservancy.org/blog/2015/nov/24/faif-carols-fundraiser/">Carol -Smith</a>, -<a href="http://www.jonobacon.org/2015/11/25/supporting-software-freedom-conservancy/">Jono -Bacon</a>, myself and -<a href="https://sfconservancy.org/sponsors/#supporters">others</a> in -becoming a -<a href="https://sfconservancy.org/supporter/">supporter</a>. For the -next week your donation will be -<a href="https://sfconservancy.org/news/2015/nov/27/black-friday/">matched</a> -by an anonymous donor. Please also consider asking your employer to -match your donation or become a sponsor of SFC. Don't forget to -spread the word about your support for SFC via email, your blog and or -social media accounts.</p> - -</blockquote> - -<p>I agree with Paul on this topic and just signed up as a Supporter -of Software Freedom Conservancy myself. Perhaps you should be a -supporter too?</p> + Unlocking HTC Desire HD on Linux using unruu and fastboot + http://people.skolelinux.org/pere/blog/Unlocking_HTC_Desire_HD_on_Linux_using_unruu_and_fastboot.html + http://people.skolelinux.org/pere/blog/Unlocking_HTC_Desire_HD_on_Linux_using_unruu_and_fastboot.html + Thu, 7 Jul 2016 11:30:00 +0200 + <p>Yesterday, I tried to unlock a HTC Desire HD phone, and it proved +to be a slight challenge. Here is the recipe if I ever need to do it +again. It all started by me wanting to try the recipe to set up +<a href="https://blog.torproject.org/blog/mission-impossible-hardening-android-security-and-privacy">an +hardened Android installation</a> from the Tor project blog on a +device I had access to. It is a old mobile phone with a broken +microphone The initial idea had been to just +<a href="http://wiki.cyanogenmod.org/w/Install_CM_for_ace">install +CyanogenMod on it</a>, but did not quite find time to start on it +until a few days ago.</p> + +<p>The unlock process is supposed to be simple: (1) Boot into the boot +loader (press volume down and power at the same time), (2) select +'fastboot' before (3) connecting the device via USB to a Linux +machine, (4) request the device identifier token by running 'fastboot +oem get_identifier_token', (5) request the device unlocking key using +the <a href="http://www.htcdev.com/bootloader/">HTC developer web +site</a> and unlock the phone using the key file emailed to you.</p> + +<p>Unfortunately, this only work fi you have hboot version 2.00.0029 +or newer, and the device I was working on had 2.00.0027. This +apparently can be easily fixed by downloading a Windows program and +running it on your Windows machine, if you accept the terms Microsoft +require you to accept to use Windows - which I do not. So I had to +come up with a different approach. I got a lot of help from AndyCap +on #nuug, and would not have been able to get this working without +him.</p> + +<p>First I needed to extract the hboot firmware from +<a href="http://www.htcdev.com/ruu/PD9810000_Ace_Sense30_S_hboot_2.00.0029.exe">the +windows binary for HTC Desire HD</a> downloaded as 'the RUU' from HTC. +For this there is is <a href="https://github.com/kmdm/unruu/">a github +project named unruu</a> using libunshield. The unshield tool did not +recognise the file format, but unruu worked and extracted rom.zip, +containing the new hboot firmware and a text file describing which +devices it would work for.</p> + +<p>Next, I needed to get the new firmware into the device. For this I +followed some instructions +<a href="http://www.htc1guru.com/2013/09/new-ruu-zips-posted/">available +from HTC1Guru.com</a>, and ran these commands as root on a Linux +machine with Debian testing:</p> + +<p><pre> +adb reboot-bootloader +fastboot oem rebootRUU +fastboot flash zip rom.zip +fastboot flash zip rom.zip +fastboot reboot +</pre></p> + +<p>The flash command apparently need to be done twice to take effect, +as the first is just preparations and the second one do the flashing. +The adb command is just to get to the boot loader menu, so turning the +device on while holding volume down and the power button should work +too.</p> + +<p>With the new hboot version in place I could start following the +instructions on the HTC developer web site. I got the device token +like this:</p> + +<p><pre> +fastboot oem get_identifier_token 2>&1 | sed 's/(bootloader) //' +</pre> + +<p>And once I got the unlock code via email, I could use it like +this:</p> + +<p><pre> +fastboot flash unlocktoken Unlock_code.bin +</pre></p> + +<p>And with that final step in place, the phone was unlocked and I +could start stuffing the software of my own choosing into the device. +So far I only inserted a replacement recovery image to wipe the phone +before I start. We will see what happen next. Perhaps I should +install <a href="https://www.debian.org/">Debian</a> on it. :)</p> - PGP key transition statement for key EE4E02F9 - http://people.skolelinux.org/pere/blog/PGP_key_transition_statement_for_key_EE4E02F9.html - http://people.skolelinux.org/pere/blog/PGP_key_transition_statement_for_key_EE4E02F9.html - Tue, 17 Nov 2015 10:50:00 +0100 - <p>I've needed a new OpenPGP key for a while, but have not had time to -set it up properly. I wanted to generate it offline and have it -available on <a href="http://shop.kernelconcepts.de/#openpgp">a OpenPGP -smart card</a> for daily use, and learning how to do it and finding -time to sit down with an offline machine almost took forever. But -finally I've been able to complete the process, and have now moved -from my old GPG key to a new GPG key. See -<a href="http://people.skolelinux.org/pere/blog/images/2015-11-17-new-gpg-key-transition.txt">the -full transition statement, signed with both my old and new key</a> for -the details. This is my new key:</p> + How to use the Signal app if you only have a land line (ie no mobile phone) + http://people.skolelinux.org/pere/blog/How_to_use_the_Signal_app_if_you_only_have_a_land_line__ie_no_mobile_phone_.html + http://people.skolelinux.org/pere/blog/How_to_use_the_Signal_app_if_you_only_have_a_land_line__ie_no_mobile_phone_.html + Sun, 3 Jul 2016 14:20:00 +0200 + <p>For a while now, I have wanted to test +<a href="https://whispersystems.org/">the Signal app</a>, as it is +said to provide end to end encrypted communication and several of my +friends and family are already using it. As I by choice do not own a +mobile phone, this proved to be harder than expected. And I wanted to +have the source of the client and know that it was the code used on my +machine. But yesterday I managed to get it working. I used the +Github source, compared it to the source in +<a href="https://chrome.google.com/webstore/detail/signal-private-messenger/bikioccmkafdpakkkcpdbppfkghcmihk?hl=en-US">the +Signal Chrome app</a> available from the Chrome web store, applied +patches to use the production Signal servers, started the app and +asked for the hidden "register without a smart phone" form. Here is +the recipe how I did it.</p> + +<p>First, I fetched the Signal desktop source from Github, using <pre> -pub 3936R/<a href="http://pgp.cs.uu.nl/stats/111D6B29EE4E02F9.html">111D6B29EE4E02F9</a> 2015-11-03 [expires: 2019-11-14] - Key fingerprint = 3AC7 B2E3 ACA5 DF87 78F1 D827 111D 6B29 EE4E 02F9 -uid Petter Reinholdtsen &lt;pere@hungry.com&gt; -uid Petter Reinholdtsen &lt;pere@debian.org&gt; -sub 4096R/87BAFB0E 2015-11-03 [expires: 2019-11-02] -sub 4096R/F91E6DE9 2015-11-03 [expires: 2019-11-02] -sub 4096R/A0439BAB 2015-11-03 [expires: 2019-11-02] +git clone https://github.com/WhisperSystems/Signal-Desktop.git </pre> -<p>The key can be downloaded from the OpenPGP key servers, signed by -my old key.</p> +<p>Next, I patched the source to use the production servers, to be +able to talk to other Signal users:</p> -<p>If you signed my old key -(<a href="http://pgp.cs.uu.nl/stats/DB4CCC4B2A30D729.html">DB4CCC4B2A30D729</a>), -I'd very much appreciate a signature on my new key, details and -instructions in the transition statement. I m happy to reciprocate if -you have a similarly signed transition statement to present.</p> +<pre> +cat &lt;&lt;EOF | patch -p0 +diff -ur ./js/background.js userdata/Default/Extensions/bikioccmkafdpakkkcpdbppfkghcmihk/0.15.0_0/js/background.js +--- ./js/background.js 2016-06-29 13:43:15.630344628 +0200 ++++ userdata/Default/Extensions/bikioccmkafdpakkkcpdbppfkghcmihk/0.15.0_0/js/background.js 2016-06-29 14:06:29.530300934 +0200 +@@ -47,8 +47,8 @@ + }); + }); + +- var SERVER_URL = 'https://textsecure-service-staging.whispersystems.org'; +- var ATTACHMENT_SERVER_URL = 'https://whispersystems-textsecure-attachments-staging.s3.amazonaws.com'; ++ var SERVER_URL = 'https://textsecure-service-ca.whispersystems.org:4433'; ++ var ATTACHMENT_SERVER_URL = 'https://whispersystems-textsecure-attachments.s3.amazonaws.com'; + var messageReceiver; + window.getSocketStatus = function() { + if (messageReceiver) { +diff -ur ./js/expire.js userdata/Default/Extensions/bikioccmkafdpakkkcpdbppfkghcmihk/0.15.0_0/js/expire.js +--- ./js/expire.js 2016-06-29 13:43:15.630344628 +0200 ++++ userdata/Default/Extensions/bikioccmkafdpakkkcpdbppfkghcmihk/0.15.0_0/js/expire.js2016-06-29 14:06:29.530300934 +0200 +@@ -1,6 +1,6 @@ + ;(function() { + 'use strict'; +- var BUILD_EXPIRATION = 0; ++ var BUILD_EXPIRATION = 1474492690000; + + window.extension = window.extension || {}; + +EOF +</pre> + +<p>The first part is changing the servers, and the second is updating +an expiration timestamp. This timestamp need to be updated regularly. +It is set 90 days in the future by the build process (Gruntfile.js). +The value is seconds since 1970 times 1000, as far as I can tell.</p> + +<p>Based on a tip and good help from the #nuug IRC channel, I wrote a +script to launch Signal in Chromium.</p> + +<pre> +#!/bin/sh +cd $(dirname $0) +mkdir -p userdata +exec chromium \ + --proxy-server="socks://localhost:9050" \ + --user-data-dir=`pwd`/userdata --load-and-launch-app=`pwd` +</pre> + +<p> The script start the app and configure Chromium to use the Tor +SOCKS5 proxy to make sure those controlling the Signal servers (today +Amazon and Whisper Systems) as well as those listening on the lines +will have a harder time location my laptop based on the Signal +connections if they use source IP address.</p> + +<p>When the script starts, one need to follow the instructions under +"Standalone Registration" in the CONTRIBUTING.md file in the git +repository. I right clicked on the Signal window to get up the +Chromium debugging tool, visited the 'Console' tab and wrote +'extension.install("standalone")' on the console prompt to get the +registration form. Then I entered by land line phone number and +pressed 'Call'. 5 seconds later the phone rang and a robot voice +repeated the verification code three times. After entering the number +into the verification code field in the form, I could start using +Signal from my laptop. + +<p>As far as I can tell, The Signal app will leak who is talking to +whom and thus who know who to those controlling the central server, +but such leakage is hard to avoid with a centrally controlled server +setup. It is something to keep in mind when using Signal - the +content of your chats are harder to intercept, but the meta data +exposing your contact network is available to people you do not know. +So better than many options, but not great. And sadly the usage is +connected to my land line, thus allowing those controlling the server +to associate it to my home and person. I would prefer it if only +those I knew could tell who I was on Signal. There are options +avoiding such information leakage, but most of my friends are not +using them, so I am stuck with Signal for now.</p> + + + + + The new "best" multimedia player in Debian? + http://people.skolelinux.org/pere/blog/The_new__best__multimedia_player_in_Debian_.html + http://people.skolelinux.org/pere/blog/The_new__best__multimedia_player_in_Debian_.html + Mon, 6 Jun 2016 12:50:00 +0200 + <p>When I set out a few weeks ago to figure out +<a href="http://people.skolelinux.org/pere/blog/What_is_the_best_multimedia_player_in_Debian_.html">which +multimedia player in Debian claimed to support most file formats / +MIME types</a>, I was a bit surprised how varied the sets of MIME types +the various players claimed support for. The range was from 55 to 130 +MIME types. I suspect most media formats are supported by all +players, but this is not really reflected in the MimeTypes values in +their desktop files. There are probably also some bogus MIME types +listed, but it is hard to identify which one this is.</p> + +<p>Anyway, in the mean time I got in touch with upstream for some of +the players suggesting to add more MIME types to their desktop files, +and decided to spend some time myself improving the situation for my +favorite media player VLC. The fixes for VLC entered Debian unstable +yesterday. The complete list of MIME types can be seen on the +<a href="https://wiki.debian.org/DebianMultimedia/PlayerSupport">Multimedia +player MIME type support status</a> Debian wiki page.</p> + +<p>The new "best" multimedia player in Debian? It is VLC, followed by +totem, parole, kplayer, gnome-mpv, mpv, smplayer, mplayer-gui and +kmplayer. I am sure some of the other players desktop files support +several of the formats currently listed as working only with vlc, +toten and parole.</p> + +<p>A sad observation is that only 14 MIME types are listed as +supported by all the tested multimedia players in Debian in their +desktop files: audio/mpeg, audio/vnd.rn-realaudio, audio/x-mpegurl, +audio/x-ms-wma, audio/x-scpls, audio/x-wav, video/mp4, video/mpeg, +video/quicktime, video/vnd.rn-realvideo, video/x-matroska, +video/x-ms-asf, video/x-ms-wmv and video/x-msvideo. Personally I find +it sad that video/ogg and video/webm is not supported by all the media +players in Debian. As far as I can tell, all of them can handle both +formats.</p>