X-Git-Url: https://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/28a4f642fdaf017206d717c0beb85d5b96b0cbb7..c76bad1e1bd8a49a721d2fff56160545cb4d9215:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 607461f1cf..ebe82441f7 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -6,6 +6,46 @@ http://people.skolelinux.org/pere/blog/ + + Fixing an hanging debian installer for Debian Edu + http://people.skolelinux.org/pere/blog/Fixing_an_hanging_debian_installer_for_Debian_Edu.html + http://people.skolelinux.org/pere/blog/Fixing_an_hanging_debian_installer_for_Debian_Edu.html + Tue, 3 Jan 2012 11:25:00 +0100 + <p>During christmas, I have been working getting the next version of +<a href="http://www.skolelinux.org/">Debian Edu / Skolelinux</a> ready +for release. The initial problem I looke at was particularly +interesting.</p> + +<P>The installer would hang at the end when it was doing it +post-installation configuration, and whatevery I did to try to find +the cause and fix it always worked while I tested it, but never when I +integrated it into the installer and ran the installation from +scratch. I would try to restart processes, close file descriptors, +remove or create files, and the installer would always unblock and +wrap up its tasks.</p> + +<p>Eventually the cause was found. The kernel was simply running out +of entropy, causing the Kerberos setup to hang waiting for more. +Pressing keys was adding entropy to the kernel, and thus all my tries +to fix the problem worked not because what I was typing to fix it, but +because I was typing.</P> + +<p>The fix I implemented was to add a background process looking at +the level of entropy in the kernel (by checking +/proc/sys/kernel/random/entropy_avail), and if it was too small, the +installer will flush the kernel file buffers and do 'find /' to +generate some disk IO. Disk IO generate entropy in the kernel, and is +one of the few things that can be initated from within the system to +generate entropy.</p> + +<p>The fix is in +<a href="http://wiki.debian.org/DebianEdu/Documentation/Squeeze/Installation">beta1 +of the Debian Edu/Squeeze</a> version, and we +<a href="http://wiki.debian.org/DebianEdu">welcome more testers and +developers</a>. We plan to release beta2 this weekend.</p> + + + Skolelinux-intervju: Peter Hansteen http://people.skolelinux.org/pere/blog/Skolelinux_intervju__Peter_Hansteen.html @@ -685,63 +725,5 @@ programvare, og tilgjengelig fra - - Mer løgnpropaganda fra BSA - http://people.skolelinux.org/pere/blog/Mer_l_gnpropaganda_fra_BSA.html - http://people.skolelinux.org/pere/blog/Mer_l_gnpropaganda_fra_BSA.html - Fri, 9 Sep 2011 11:00:00 +0200 - <p>I år igjen er Microsoft-politiet BSA ute med løgnpropagandaen sin. -Hvert år de siste årene har BSA, lobbyfronten til de store -programvareselskapene som Microsoft og Apple, publisert en rapport der -de gjetter på hvor mye piratkopiering påfører i tapte inntekter i -ulike land rundt om i verden. Resultatene er alltid tendensiøse. -Den siste rapporten er tilgjengelig fra -<a href="http://portal.bsa.org/globalpiracy2010/downloads/opinionsurvey/survey_global.pdf">deres -nettsted</a>.</p> - -<p>Den har fått endel dekning av journalister som åpenbart ikke har -tenkt på å stille kritiske spørsmål om resultatene. Se f.eks. -<a href="http://www.digi.no/877642/halvparten-bruker-pirat-program">digi.no</a>, -<a href="http://www.hardware.no/artikler/halvparten_av_alle_pc-brukere_er_pirater/101791">hardware.no</a> -og -<a href="http://www.aftenposten.no/forbruker/digital/article4220787.ece">aftenposten.no</a>.</p> - -<p>BSA-undersøkelsene er søppel som inneholder oppblåste tall, og -har gjentatte ganger blitt tatt for dette. Her er noen interessante -referanser med bakgrunnsinformasjon.</p> - -<p><ul> - -<li><a href="http://www.idg.no/selskaper/article190966.ece">Fnyser av - nye pirattall fra BSA</a> Computerworld Norge 2011.</li> - -<li><a href="http://www.idg.se/2.1085/1.229795/bsa-hoftade-sverigesiffror">BSA -höftade Sverigesiffror</a> Computerworld Sverige 2009.</li> - -<li><a href="http://www.v3.co.uk/v3-uk/opinion/1972843/bsa-piracy-figures-shot-reality">BSA - piracy figures need a shot of reality</a> v3.co.uk 2009</li> - -<li><a href="http://www.michaelgeist.ca/content/view/3958/125/">Does The WIPO Copyright Treaty Work? The Business Software Association Piracy Data</a> Michael Geist blogg 2009</li> - -<li><a href="http://torrentfreak.com/australian-govt-draft-says-piracy-stats-made-up/">Australian - govt draft says piracy stats are made up</a> Torrentfreak 2006.</li> - -<li><a href="http://www.boingboing.net/2006/05/19/is_one_months_piracy.html">Is - one month's piracy worth more than France's GDP?</a> Boing Boing - 2006.</li> - -<li><a href="http://www.idg.no/bransje/bransjenyheter/article6603.ece">Sviende - kritikk mot pirat-tall</a> Computerworld Norge 2005.</li> - -</ul></p> - -<p>Personlig skulle jeg ønske BSA var enda mer ivrig og mer hardhendt -i å håndheve de ikke-frie programvarelisensene (og de er ganske ivrige -allerede), slik at brukerne av disse forsto vilkårene bedre. Jeg tror -nemlig ingen som forstår vilkårene vil akseptere dem og at det vil -føre til at flere tar i bruk fri programvare.</p> - - -