X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/532040142f57d870fc8b1ce39af51c21bdf79c6e..0932d1479ea12acb79138d4aeadb83f639ea0ce2:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 9d6222a661..f6fbda990e 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -3,464 +3,429 @@ Petter Reinholdtsen - - + http://people.skolelinux.org/pere/blog/ + - Avisene i endring - Avisene_i_endring.html - Avisene_i_endring.html - Sun, 15 Mar 2009 22:15:00 +0100 + Togsatsing på norsk, mot sykkel + http://people.skolelinux.org/pere/blog/Togsatsing_p___norsk__mot_sykkel.html + http://people.skolelinux.org/pere/blog/Togsatsing_p___norsk__mot_sykkel.html + Wed, 2 Jun 2010 23:45:00 +0200 -<p>Jeg kom over bloggposten -"<a href="http://www.shirky.com/weblog/2009/03/newspapers-and-thinking-the-unthinkable/">Newspapers -and Thinking the Unthinkable</a>" som jeg synes forklarer godt hva som -skjer med aviser, og fikk meg til å tenke litt rundt andre utdøende -forretningsmodeller basert på å løse problemer som ikke lenger -eksisterer. Det blir spennende å se hva vi ender opp med.</p> +<p>Det står dårlig til med toget når en finner på å la det +<a href="http://www.aftenposten.no/nyheter/iriks/article3677060.ece">kappkjøre +med sykkel</a>... Jeg tror det trengs strukturendringer for å få +fikset på togproblemene i Norge.</p> + +<p>Mon tro hva toglinje mellom Narvik og Tromsø ville hatt slags +effekt på området der?</p> - En skam at det ikke finnes ordrett referat fra norske domstoler - En_skam_at_det_ikke_finnes_ordrett_referat_fra_norske_domstoler.html - En_skam_at_det_ikke_finnes_ordrett_referat_fra_norske_domstoler.html - Fri, 13 Mar 2009 18:00:00 +0100 + KDM fail at boot with NVidia cards - and no one try to fix it? + http://people.skolelinux.org/pere/blog/KDM_fail_at_boot_with_NVidia_cards___and_no_one_try_to_fix_it_.html + http://people.skolelinux.org/pere/blog/KDM_fail_at_boot_with_NVidia_cards___and_no_one_try_to_fix_it_.html + Tue, 1 Jun 2010 17:05:00 +0200 -<p>Advokatene jobber i disse dager hardt for å bli kvitt juryordningen -fra norske domstoler. Det har de forsåvidt jobbet med i mange år. -Personlig tror jeg det er å starte i feil ende, og en dårlig ide.</p> - -<p>Visst du at det ikke lages ordrett referat fra norske domstoler? -Det er ingen som skriver ned alt som sies i en norsk rettsal slik en -ser i TV-serier fra USA. Det som publiseres er dommerens -oppsummering, og alt som ikke blir med i den oppsummeringen er det -vanskelig å få dokumentert i ettertid. Konsekvensen er at en kan -lyve så mye en vil fra vitneboksen uten å bli tatt for det i -ettertid, hvis dommeren ikke syntes det som ble sagt var så -interessant at det ble med i dokumentet som dokumenterer -domsavsigelsen. Mens alt som sies fra Stortingets talerstol er -tilgjengelig på web etter kort tid for kontroll og kritikk, er det -ingen tilsvarende mulighet for det som sies fra vitneboksen i en norsk -domstol. Kan dette føre til at en sak varer lengre enn nødvendig i -rettssystemet? Jeg tror det, og synes det er en skam at det ikke -publiseres ordrette referater fra norske rettsaler.</p> - -<p>En relatert observasjon er at det i utvalgte deler av landet -eksperimenteres med lydopptak fra rettsalen, men disse opptakene er -kun tilgjengelig for dommeren til hjelp når oppsummeringen skrives. -Jeg synes som et minimum at disse lydopptakene som en regel burde vært -publisert offentlig på web.</p> +<p>It is strange to watch how a bug in Debian causing KDM to fail to +start at boot when an NVidia video card is used is handled. The +problem seem to be that the nvidia X.org driver uses a long time to +initialize, and this duration is longer than kdm is configured to +wait.</p> + +<p>I came across two bugs related to this issue, +<a href="http://bugs.debian.org/583312">#583312</a> initially filed +against initscripts and passed on to nvidia-glx when it became obvious +that the nvidia drivers were involved, and +<a href="http://bugs.debian.org/524751">#524751</a> initially filed against +kdm and passed on to src:nvidia-graphics-drivers for unknown reasons.</p> + +<p>To me, it seem that no-one is interested in actually solving the +problem nvidia video card owners experience and make sure the Debian +distribution work out of the box for these users. The nvidia driver +maintainers expect kdm to be set up to wait longer, while kdm expect +the nvidia driver maintainers to fix the driver to start faster, and +while they wait for each other I guess the users end up switching to a +distribution that work for them. I have no idea what the solution is, +but I am pretty sure that waiting for each other is not it.</p> + +<p>I wonder why we end up handling bugs this way.</p> - Testing av reprap-elektronikken igang - Testing_av_reprap_elektronikken_igang.html - Testing_av_reprap_elektronikken_igang.html - Thu, 12 Mar 2009 16:00:00 +0100 + Parallellized boot seem to hold up well in Debian/testing + http://people.skolelinux.org/pere/blog/Parallellized_boot_seem_to_hold_up_well_in_Debian_testing.html + http://people.skolelinux.org/pere/blog/Parallellized_boot_seem_to_hold_up_well_in_Debian_testing.html + Thu, 27 May 2010 23:55:00 +0200 -<p>Lenge siden det var en oppdatering av status for min 3D-skriver og -i mellomtiden har det skjedd en god del. Reprap-en er nesten ferdig -montert, og elektronikken er også nesten ferdig loddet. Det ser ut -til at bits-from-bytes sitt byggesett versjon 2.01 hadde noen småfeil, -der en del manglet og en annen hadde suboptimalt design. Jeg løser -antagelig det ene problemet med å borre noen ekstra hull til skruver i -en plastdelen som trenger å festes. Det andre problemet håper jeg å -få hjelp fra Audun Vaaler ved Høgskolen i Østfold til å løse. -Høgskolen er igang med å bygge en tilsvarende reprap i versjon 2.0, og -er kommet litt lenger enn meg. De kan forhåpentligvis skrive ut den -delen jeg mangler på denne.</p> - -<p>Når det gjelder elektronikken, så er mye allerede loddet sammen av -min venn Anders Rosnes, som har mer peiling på elektronikk og lodding -enn meg. Jeg fikk i dag testet -<a href="http://reprap.org/bin/view/Main/Stepper_Motor_Driver_1_1">stepper -motordriveren (v1.1)</a>, og det fungerte. Jeg møtte et lite problem -med strømforsyningen, en standard ATX-strømforsyning som nektet å -fungere før jeg hadde satt en ledning mellom GRD og PS_ON som -beskrevet på -<a href="http://dev.www.reprap.org/bin/view/Main/PCPowerSupply">reprap-sidene -om PC-strømforsyninger</a>. Jeg møtte også et annet problem med -Arduino-programvaren. Versjon 0013 fungerer visst ikke på -Debian/Etch. Den kompilerte binæren ble på 0 bytes. En side jeg fant -vha. et Google-søk -<a href="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1234153046/5">tipset -meg</A> om at en nedgradering -til <a href="http://arduino.googlecode.com/files/arduino-0012-linux.tgz">versjon -0012</a> kunne løse problemet, og endelig ser jeg motorakslingen -snurre. Nå er det å koble sammen mekanikk og elektronikk for å se om -reprap-en kvikner til.</p> +<p>A few days ago, parallel booting was enabled in Debian/testing. +The feature seem to hold up pretty well, but three fairly serious +issues are known and should be solved: + +<p><ul> + +<li>The wicd package seen to +<a href="http://bugs.debian.org/508289">break NFS mounting</a> and +<a href="http://bugs.debian.org/581586">network setup</a> when +parallel booting is enabled. No idea why, but the wicd maintainer +seem to be on the case.</li> + +<li>The nvidia X driver seem to +<a href="http://bugs.debian.org/583312">have a race condition</a> +triggered more easily when parallel booting is in effect. The +maintainer is on the case.</li> + +<li>The sysv-rc package fail to properly enable dependency based boot +sequencing (the shutdown is broken) when old file-rc users +<a href="http://bugs.debian.org/575080">try to switch back</a> to +sysv-rc. One way to solve it would be for file-rc to create +/etc/init.d/.legacy-bootordering, and another is to try to make +sysv-rc more robust. Will investigate some more and probably upload a +workaround in sysv-rc to help those trying to move from file-rc to +sysv-rc get a working shutdown.</li> + +</ul></p> + +<p>All in all not many surprising issues, and all of them seem +solvable before Squeeze is released. In addition to these there are +some packages with bugs in their dependencies and run level settings, +which I expect will be fixed in a reasonable time span.</p> + +<p>If you report any problems with dependencies in init.d scripts to +the BTS, please usertag the report to get it to show up at +<a href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org">the +list of usertagged bugs related to this</a>.</p> + +<p>Update: Correct bug number to file-rc issue.</p> - Frikanalen og jul i studentrådet - Frikanalen_og_jul_i_studentr__det.html - Frikanalen_og_jul_i_studentr__det.html - Wed, 11 Mar 2009 23:40:00 +0100 + More flexible firmware handling in debian-installer + http://people.skolelinux.org/pere/blog/More_flexible_firmware_handling_in_debian_installer.html + http://people.skolelinux.org/pere/blog/More_flexible_firmware_handling_in_debian_installer.html + Sat, 22 May 2010 21:30:00 +0200 -<p>I går -<a href="http://lists.nuug.no/pipermail/interesserte/2009-March/000387.html">lanserte</a> -NUUGs videogruppe -<a href="http://www.frikanalen.no">Frikanalen</a> med -<a href="http://www.nuug.no/pub/video/frikanalen/frontpage.cgi">åpne -standarder</a>, og resultatet av noen intense uker med arbeide kunne -endelig presenteres. Jeg har tro på åpen kanalkonseptet som -Frikanalen er et eksempel på, der borgerne får anledning til å -kringkaste sitt syn på en åpen og demokratisk måte. Jeg er veldig -glad vi har fått gjort kanalen tilgjengelig i Ogg Theora, slik at alle -kan få tilgang til opptakene på web, og slipper å måtte installere MS -Silverlight for å spille av opptakene.</p> - -<p>Frikanalen har en brokete historie, og dagens inkarnasjon er ikke -helt slik foreningen Åpen kanal planla det for mange år siden, noe som -er bakgrunnen for at det fredag 13. mars 2009 kl 09:00 starter en -rettsak i Oslo tingrett der Kringkasterforeningen (tidligere -foreningen Åpen kanal) har saksøkt kulturdepartementet over -konsesjonsvilkårene til Frikanalen. Jeg er spent på resultatet.</p> - -<p>I arbeidet med Frikanalen med åpne standarder, så har vi hatt glede -av å se en rekke av innslagene som er tilgjengelig. Her er mye -religiøst sludder, fra -<a href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=720">vandring -i jerusalem</a> via -<a href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=779">religiøst -vinklede nyheter</a> til -<a -href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=2077">kreasjonisk -retorikk</a>, men også fine -<a href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=407">dokumentarer -om redningsselskapet</a> og -<a href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=2204">interessante -tegneserieanmeldelser</a>. Det jeg derimot har hatt størst glede av, -er - -<a href="http://www.nuug.no/pub/video/frikanalen/fetchvideo.cgi?videoId=1556">jul -i studentrådet</a>, der hver episode var en fest å se på. Jeg håper -NUUG lykkes med å få ut sine opptak med like stor suksess.</p> +<p>After a long break from debian-installer development, I finally +found time today to return to the project. Having to spend less time +working dependency based boot in debian, as it is almost complete now, +definitely helped freeing some time.</p> + +<p>A while back, I ran into a problem while working on Debian Edu. We +include some firmware packages on the Debian Edu CDs, those needed to +get disk and network controllers working. Without having these +firmware packages available during installation, it is impossible to +install Debian Edu on the given machine, and because our target group +are non-technical people, asking them to provide firmware packages on +an external medium is a support pain. Initially, I expected it to be +enough to include the firmware packages on the CD to get +debian-installer to find and use them. This proved to be wrong. +Next, I hoped it was enough to symlink the relevant firmware packages +to some useful location on the CD (tried /cdrom/ and +/cdrom/firmware/). This also proved to not work, and at this point I +found time to look at the debian-installer code to figure out what was +going to work.</p> + +<p>The firmware loading code is in the hw-detect package, and a closer +look revealed that it would only look for firmware packages outside +the installation media, so the CD was never checked for firmware +packages. It would only check USB sticks, floppies and other +"external" media devices. Today I changed it to also look in the +/cdrom/firmware/ directory on the mounted CD or DVD, which should +solve the problem I ran into with Debian edu. I also changed it to +look in /firmware/, to make sure the installer also find firmware +provided in the initrd when booting the installer via PXE, to allow us +to provide the same feature in the PXE setup included in Debian +Edu.</p> + +<p>To make sure firmware deb packages with a license questions are not +activated without asking if the license is accepted, I extended +hw-detect to look for preinst scripts in the firmware packages, and +run these before activating the firmware during installation. The +license question is asked using debconf in the preinst, so this should +solve the issue for the firmware packages I have looked at so far.</p> + +<p>If you want to discuss the details of these features, please +contact us on debian-boot@lists.debian.org.</p> - Lisensvalg for NUUG-opptakene endelig på plass - Lisensvalg_for_NUUG_opptakene_endelig_p___plass.html - Lisensvalg_for_NUUG_opptakene_endelig_p___plass.html - Fri, 6 Mar 2009 21:20:00 +0100 + Magnetstripeinnhold i billetter fra Flytoget og Hurtigruten + http://people.skolelinux.org/pere/blog/Magnetstripeinnhold_i_billetter_fra_Flytoget_og_Hurtigruten.html + http://people.skolelinux.org/pere/blog/Magnetstripeinnhold_i_billetter_fra_Flytoget_og_Hurtigruten.html + Fri, 21 May 2010 16:00:00 +0200 -<p>Etter mange års meditasjon over temaet, har NUUG endelig klart å -bestemme seg for hvilken lisens vi skal bruke på videoopptakene som -gjøres av NUUGs videogruppe. Ole Kristian har annonsert at lisensen -blir <a href="http://creativecommons.org/licenses/by-sa/3.0/no/">Creative -Commons Navngivelse-Del på samme vilkår 3.0 Norge</a>. Jeg er veldig -glad for at denne saken endelig er landet. Lisensen for opptaket til -Stallman-foredraget ble en annen pga. at lisensvalget ikke var avklart -på forhånd og IFI og PING ønsket CC-BY-ND, og må ses på som et unntak -i denne sammenhengen.</p> +<p>For en stund tilbake kjøpte jeg en magnetkortleser for å kunne +titte på hva som er skrevet inn på magnetstripene til ulike kort. Har +ikke hatt tid til å analysere mange kort så langt, men tenkte jeg +skulle dele innholdet på to kort med mine lesere.</p> + +<p>For noen dager siden tok jeg flyet til Harstad og Hurtigruten til +Bergen. Flytoget fra Oslo S til flyplassen ga meg en billett med +magnetstripe. Påtrykket finner jeg følgende informasjon:</p> + +<pre> +Flytoget Airport Express Train + +Fra - Til : Oslo Sentralstasjon +Kategori : Voksen +Pris : Nok 170,00 +Herav mva. 8,00% : NOK 12,59 +Betaling : Kontant +Til - Fra : Oslo Lufthavn +Utstedt: : 08.05.10 +Gyldig Fra-Til : 08.05.10-07.11.10 +Billetttype : Enkeltbillett + +102-1015-100508-48382-01-08 +</pre> + +<p>På selve magnetstripen er innholdet +<tt>;E?+900120011=23250996541068112619257138248441708433322932704083389389062603279671261502492655?</tt>. +Aner ikke hva innholdet representerer, og det er lite overlapp mellom +det jeg ser trykket på billetten og det jeg ser av tegn i +magnetstripen. Håper det betyr at de bruker kryptografiske metoder +for å gjøre det vanskelig å forfalske billetter.</p> + +<p>Den andre billetten er fra Hurtigruten, der jeg mistenker at +strekkoden på fronten er mer brukt enn magnetstripen (det var i hvert +fall den biten vi stakk inn i dørlåsen).</p> + +<p>Påtrykket forsiden er følgende:</p> + +<pre> +Romnummer 727 +Hurtigruten +Midnatsol +Reinholdtsen +Petter +Bookingno: SAX69 0742193 +Harstad-Bergen +Dep: 09.05.2010 Arr: 12.05.2010 +Lugar fra Risøyhamn +Kost: FRO=4 +</pre> + +<p>På selve magnetstripen er innholdet +<tt>;1316010007421930=00000000000000000000?+E?</tt>. Heller ikke her +ser jeg mye korrespondanse mellom påtrykk og magnetstripe.</p> - Teknisk program for Go Open 2009 er nesten ferdig - Teknisk_program_for_Go_Open_2009_er_nesten_ferdig.html - Teknisk_program_for_Go_Open_2009_er_nesten_ferdig.html - Thu, 5 Mar 2009 22:30:00 +0100 + Pieces of the roaming laptop puzzle in Debian + http://people.skolelinux.org/pere/blog/Pieces_of_the_roaming_laptop_puzzle_in_Debian.html + http://people.skolelinux.org/pere/blog/Pieces_of_the_roaming_laptop_puzzle_in_Debian.html + Wed, 19 May 2010 19:00:00 +0200 -<p>Etter lang tids jobbing begynner endelig programmet til det -tekniske sporet på konferansen <a href="http://www.goopen.no/">Go Open -2009</a> å bli ferdig. Det blir 9 punkter på programmet, og etter alt -å dømme blir det disse 9:</p> - -<ul> - -<li>"Open Telephony: A solution greater than the sum of its parts" med - Jon "maddog" Hall</li> -<li>OpenSolaris-relatert med Ian Murdock fra SUN</li> -<li>"The inner workings of the OpenStreetmap project and the - technology used" med Andy Allan </li> -<li>Coreboot-relatert med Peter Stuge</li> -<li>"Gratis værdata fra Meteorologisk institutt" med Trond Michelsen</li> -<li>RRDtool/Nagios-relatert med Tobias Oetiker</li> -<li>"Developers guide to server-side productivity and fun using open - source platforms and frameworks" med en gjeng folk fra - JavaBin-miljøet</li> -<li>"G(et)it Nå!" med Marcus Ramberg</li> -<li>Om kontrolltelling av valgresultater med fri programvare med Mitch - Trachtenberg</li> - -</ul> - -<p>De siste bekreftelsene og overskrifter mangler og kommer -forhåpentlig på plass før mandag, men jeg håper dette blir et program -flere enn meg vil sette pris på. Jeg gleder meg i hvert fall -stort.</p> +<p>Today, the last piece of the puzzle for roaming laptops in Debian +Edu finally entered the Debian archive. Today, the new +<a href="http://packages.qa.debian.org/libp/libpam-mklocaluser.html">libpam-mklocaluser</a> +package was accepted. Two days ago, two other pieces was accepted +into unstable. The +<a href="http://packages.qa.debian.org/p/pam-python.html">pam-python</a> +package needed by libpam-mklocaluser, and the +<a href="http://packages.qa.debian.org/s/sssd.html">sssd</a> package +passed NEW on Monday. In addition, the +<a href="http://packages.qa.debian.org/libp/libpam-ccreds.html">libpam-ccreds</a> +package we need is in experimental (version 10-4) since Saturday, and +hopefully will be moved to unstable soon.</p> + +<p>This collection of packages allow for two different setups for +roaming laptops. The traditional setup would be using libpam-ccreds, +nscd and libpam-mklocaluser with LDAP or Kerberos authentication, +which should work out of the box if the configuration changes proposed +for nscd in <a href="http://bugs.debian.org/485282">BTS report +#485282</a> is implemented. The alternative setup is to use sssd with +libpam-mklocaluser to connect to LDAP or Kerberos and let sssd take +care of the caching of passwords and group information.</p> + +<p>I have so far been unable to get sssd to work with the LDAP server +at the University, but suspect the issue is some SSL/GnuTLS related +problem with the server certificate. I plan to update the Debian +package to version 1.2, which is scheduled for next week, and hope to +find time to make sure the next release will include both the +Debian/Ubuntu specific patches. Upstream is friendly and responsive, +and I am sure we will find a good solution.</p> + +<p>The idea is to set up the roaming laptops to authenticate using +LDAP or Kerberos and create a local user with home directory in /home/ +when a usre in LDAP logs in via KDM or GDM for the first time, and +cache the password for offline checking, as well as caching group +memberhips and other relevant LDAP information. The +libpam-mklocaluser package was created to make sure the local home +directory is in /home/, instead of /site/server/directory/ which would +be the home directory if pam_mkhomedir was used. To avoid confusion +with support requests and configuration, we do not want local laptops +to have users in a path that is used for the same users home directory +on the home directory servers.</p> + +<p>One annoying problem with gdm is that it do not show the PAM +message passed to the user from libpam-mklocaluser when the local user +is created. Instead gdm simply reject the login with some generic +message. The message is shown in kdm, ssh and login, so I guess it is +a bug in gdm. Have not investigated if there is some other message +type that can be used instead to get gdm to also show the message.</p> + +<p>If you want to help out with implementing this for Debian Edu, +please contact us on debian-edu@lists.debian.org.</p> - Checking server hardware support status for Dell, HP and IBM servers - Checking_server_hardware_support_status_for_Dell__HP_and_IBM_servers.html - Checking_server_hardware_support_status_for_Dell__HP_and_IBM_servers.html - Sat, 28 Feb 2009 23:50:00 +0100 + Parallellized boot is now the default in Debian/unstable + http://people.skolelinux.org/pere/blog/Parallellized_boot_is_now_the_default_in_Debian_unstable.html + http://people.skolelinux.org/pere/blog/Parallellized_boot_is_now_the_default_in_Debian_unstable.html + Fri, 14 May 2010 22:40:00 +0200 -<p>At work, we have a few hundred Linux servers, and with that amount -of hardware it is important to keep track of when the hardware support -contract expire for each server. We have a machine (and service) -register, which until recently did not contain much useful besides the -machine room location and contact information for the system owner for -each machine. To make it easier for us to track support contract -status, I've recently spent time on extending the machine register to -include information about when the support contract expire, and to tag -machines with expired contracts to make it easy to get a list of such -machines. I extended a perl script already being used to import -information about machines into the register, to also do some screen -scraping off the sites of Dell, HP and IBM (our majority of machines -are from these vendors), and automatically check the support status -for the relevant machines. This make the support status information -easily available and I hope it will make it easier for the computer -owner to know when to get new hardware or renew the support contract. -The result of this work documented that 27% of the machines in the -registry is without a support contract, and made it very easy to find -them. 27% might seem like a lot, but I see it more as the case of us -using machines a bit longer than the 3 years a normal support contract -last, to have test machines and a platform for less important -services. After all, the machines without a contract are working fine -at the moment and the lack of contract is only a problem if any of -them break down. When that happen, we can either fix it using spare -parts from other machines or move the service to another old -machine.</p> - -<p>I believe the code for screen scraping the Dell site was originally -written by Trond Hasle Amundsen, and later adjusted by me and Morten -Werner Forsbring. The HP scraping was written by me after reading a -nice article in ;login: about how to use WWW::Mechanize, and the IBM -scraping was written by me based on the Dell code. I know the HTML -parsing could be done using nice libraries, but did not want to -introduce more dependencies. This is the current incarnation:</p> - -<pre> -use LWP::Simple; -use POSIX; -use WWW::Mechanize; -use Date::Parse; -[...] -sub get_support_info { - my ($machine, $model, $serial, $productnumber) = @_; - my $str; - - if ( $model =~ m/^Dell / ) { - # fetch website from Dell support - my $url = "http://support.euro.dell.com/support/topics/topic.aspx/emea/shared/support/my_systems_info/no/details?c=no&amp;cs=nodhs1&amp;l=no&amp;s=dhs&amp;ServiceTag=$serial"; - my $webpage = get($url); - return undef unless ($webpage); - - my $daysleft = -1; - my @lines = split(/\n/, $webpage); - foreach my $line (@lines) { - next unless ($line =~ m/Beskrivelse/); - $line =~ s/&lt;[^>]+?>/;/gm; - $line =~ s/^.+?;(Beskrivelse;)/$1/; - - my @f = split(/\;/, $line); - @f = @f[13 .. $#f]; - my $lastend = ""; - while ($f[3] eq "DELL") { - my ($type, $startstr, $endstr, $days) = @f[0, 5, 7, 10]; - - my $start = POSIX::strftime("%Y-%m-%d", - localtime(str2time($startstr))); - my $end = POSIX::strftime("%Y-%m-%d", - localtime(str2time($endstr))); - $str .= "$type $start -> $end "; - @f = @f[14 .. $#f]; - $lastend = $end if ($end gt $lastend); - } - my $today = POSIX::strftime("%Y-%m-%d", localtime(time)); - tag_machine_unsupported($machine) - if ($lastend lt $today); - } - } elsif ( $model =~ m/^HP / ) { - my $mech = WWW::Mechanize->new(); - my $url = - 'http://www1.itrc.hp.com/service/ewarranty/warrantyInput.do'; - $mech->get($url); - my $fields = { - 'BODServiceID' => 'NA', - 'RegisteredPurchaseDate' => '', - 'country' => 'NO', - 'productNumber' => $productnumber, - 'serialNumber1' => $serial, - }; - $mech->submit_form( form_number => 2, - fields => $fields ); - # Next step is screen scraping - my $content = $mech->content(); - - $content =~ s/&lt;[^>]+?>/;/gm; - $content =~ s/\s+/ /gm; - $content =~ s/;\s*;/;;/gm; - $content =~ s/;[\s;]+/;/gm; - - my $today = POSIX::strftime("%Y-%m-%d", localtime(time)); - - while ($content =~ m/;Warranty Type;/) { - my ($type, $status, $startstr, $stopstr) = $content =~ - m/;Warranty Type;([^;]+);.+?;Status;(\w+);Start Date;([^;]+);End Date;([^;]+);/; - $content =~ s/^.+?;Warranty Type;//; - my $start = POSIX::strftime("%Y-%m-%d", - localtime(str2time($startstr))); - my $end = POSIX::strftime("%Y-%m-%d", - localtime(str2time($stopstr))); - - $str .= "$type ($status) $start -> $end "; - - tag_machine_unsupported($machine) - if ($end lt $today); - } - } elsif ( $model =~ m/^IBM / ) { - # This code ignore extended support contracts. - my ($producttype) = $model =~ m/.*-\[(.{4}).+\]-/; - if ($producttype &amp;&amp; $serial) { - my $content = - get("http://www-947.ibm.com/systems/support/supportsite.wss/warranty?action=warranty&amp;brandind=5000008&amp;Submit=Submit&amp;type=$producttype&amp;serial=$serial"); - if ($content) { - $content =~ s/&lt;[^>]+?>/;/gm; - $content =~ s/\s+/ /gm; - $content =~ s/;\s*;/;;/gm; - $content =~ s/;[\s;]+/;/gm; - - $content =~ s/^.+?;Warranty status;//; - my ($status, $end) = $content =~ m/;Warranty status;([^;]+)\s*;Expiration date;(\S+) ;/; - - $str .= "($status) -> $end "; - - my $today = POSIX::strftime("%Y-%m-%d", localtime(time)); - tag_machine_unsupported($machine) - if ($end lt $today); - } - } - } - return $str; -} -</pre> - -<p>Here are some examples on how to use the function, using fake -serial numbers. The information passed in as arguments are fetched -from dmidecode.</p> - -<pre> -print get_support_info("hp.host", "HP ProLiant BL460c G1", "1234567890" - "447707-B21"); -print get_support_info("dell.host", "Dell Inc. PowerEdge 2950", "1234567"); -print get_support_info("ibm.host", "IBM eserver xSeries 345 -[867061X]-", - "1234567"); -</pre> - -<p>I would recommend this approach for tracking support contracts for -everyone with more than a few computers to administer. :)</p> - -<p>Update 2009-03-06: The IBM page do not include extended support -contracts, so it is useless in that case. The original Dell code do -not handle extended support contracts either, but has been updated to -do so.</p> +<p>Since this evening, parallel booting is the default in +Debian/unstable for machines using dependency based boot sequencing. +Apparently the testing of concurrent booting has been wider than +expected, if I am to believe the +<a href="http://lists.debian.org/debian-devel/2010/05/msg00122.html">input +on debian-devel@</a>, and I concluded a few days ago to move forward +with the feature this weekend, to give us some time to detect any +remaining problems before Squeeze is frozen. If serious problems are +detected, it is simple to change the default back to sequential boot. +The upload of the new sysvinit package also activate a new upstream +version.</p> + +More information about +<a href="http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot">dependency +based boot sequencing</a> is available from the Debian wiki. It is +currently possible to disable parallel booting when one run into +problems caused by it, by adding this line to /etc/default/rcS:</p> + +<blockquote><pre> +CONCURRENCY=none +</pre></blockquote> + +<p>If you report any problems with dependencies in init.d scripts to +the BTS, please usertag the report to get it to show up at +<a href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org">the +list of usertagged bugs related to this</a>.</p> - Using bar codes at a computing center - Using_bar_codes_at_a_computing_center.html - Using_bar_codes_at_a_computing_center.html - Fri, 20 Feb 2009 08:50:00 +0100 + Sitesummary tip: Listing MAC address of all clients + http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_MAC_address_of_all_clients.html + http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_MAC_address_of_all_clients.html + Fri, 14 May 2010 21:10:00 +0200 -<p>At work with the University of Oslo, we have several hundred computers -in our computing center. This give us a challenge in tracking the -location and cabling of the computers, when they are added, moved and -removed. Some times the location register is not updated when a -computer is inserted or moved and we then have to search the room for -the "missing" computer.</p> - -<p>In the last issue of Linux Journal, I came across a project -<a href="http://www.libdmtx.org/">libdmtx</a> to write and read bar -code blocks as defined in the -<a href="http://en.wikipedia.org/wiki/Data_Matrix">The Data Matrix -Standard</a>. This is bar codes that can be read with a normal -digital camera, for example that on a cell phone, and several such bar -codes can be read by libdmtx from one picture. The bar code standard -allow up to 2 KiB to be written in the tag. There is another project -with <a href="http://www.terryburton.co.uk/barcodewriter/">a bar code -writer written in postscript</a> capable of creating such bar codes, -but this was the first time I found a tool to read these bar -codes.</p> - -<p>It occurred to me that this could be used to tag and track the -machines in our computing center. If both racks and computers are -tagged this way, we can use a picture of the rack and all its -computers to detect the rack location of any computer in that rack. -If we do this regularly for the entire room, we will find all -locations, and can detect movements and removals.</p> - -<p>I decided to test if this would work in practice, and picked a -random rack and tagged all the machines with their names. Next, I -took pictures with my digital camera, and gave the dmtxread program -these JPEG pictures to see how many tags it could read. This worked -fairly well. If the pictures was well focused and not taken from the -side, all tags in the image could be read. Because of limited space -between the racks, I was unable to get a good picture of the entire -rack, but could without problem read all tags from a picture covering -about half the rack. I had to limit the search time used by dmtxread -to 60000 ms to make sure it terminated in a reasonable time frame.</p> - -<p>My conclusion is that this could work, and we should probably look -at adjusting our computer tagging procedures to use bar codes for -easier automatic tracking of computers.</p> +<p>In the recent Debian Edu versions, the +<a href="http://wiki.debian.org/DebianEdu/HowTo/SiteSummary">sitesummary +system</a> is used to keep track of the machines in the school +network. Each machine will automatically report its status to the +central server after boot and once per night. The network setup is +also reported, and using this information it is possible to get the +MAC address of all network interfaces in the machines. This is useful +to update the DHCP configuration.</p> + +<p>To give some idea how to use sitesummary, here is a one-liner to +ist all MAC addresses of all machines reporting to sitesummary. Run +this on the collector host:</p> + +<blockquote><pre> +perl -MSiteSummary -e 'for_all_hosts(sub { print join(" ", get_macaddresses(shift)), "\n"; });' +</pre></blockquote> + +<p>This will list all MAC addresses assosiated with all machine, one +line per machine and with space between the MAC addresses.</p> + +<p>To allow system administrators easier job at adding static DHCP +addresses for hosts, it would be possible to extend this to fetch +machine information from sitesummary and update the DHCP and DNS +tables in LDAP using this information. Such tool is unfortunately not +written yet.</p> - Kart over overvåkningskamera i Norge - Kart_over_overv__kningskamera_i_Norge.html - Kart_over_overv__kningskamera_i_Norge.html - Sun, 15 Feb 2009 22:30:00 +0100 + systemd, an interesting alternative to upstart + http://people.skolelinux.org/pere/blog/systemd__an_interesting_alternative_to_upstart.html + http://people.skolelinux.org/pere/blog/systemd__an_interesting_alternative_to_upstart.html + Thu, 13 May 2010 22:20:00 +0200 -<p>I regi av -<a href="http://www.personvern.no/">personvernforeningen</a> har jeg -startet på -<a href="http://personvern.no/wiki/index.php/Kameraovervåkning">et -kart over overvåkningskamera i Norge</a>. Bakgrunnen er at det etter -min mening bærer galt avsted med den massive overvåkningen som -finner sted i Norge i dag, og at flere og flere overvåkningskamera -gjør det vanskeligere og vanskeligere å gå igjennom livet uten at -små og store brødre trenger inn i ens private sfære. Datatilsynet -har et register over kameraovervåkning, men det viser seg å være -ubrukelig både til å finne ut hvor det er kamera plassert, og til å -sjekke om et kamera en kommer over er registrert. Dette nye kartet -fikser en av disse manglene, men det vil fortsatt være umulig å vite -om et kamera er registrert etter lovens krav eller ikke. Pr. nå er -22 kamera i Oslo registrert, og det trengs flere til å registrere -alle. Informasjonen registreres direkte inn i <a -href="http://www.openstreetmap.org/">OpenStreetmap</a>, sa hentes det -automatisk over i spesialkartet.</p> +<p>The last few days a new boot system called +<a href="http://www.freedesktop.org/wiki/Software/systemd">systemd</a> +has been +<a href="http://0pointer.de/blog/projects/systemd.html">introduced</a> + +to the free software world. I have not yet had time to play around +with it, but it seem to be a very interesting alternative to +<a href="http://upstart.ubuntu.com/">upstart</a>, and might prove to be +a good alternative for Debian when we are able to switch to an event +based boot system. Tollef is +<a href="http://bugs.debian.org/580814">in the process</a> of getting +systemd into Debian, and I look forward to seeing how well it work. I +like the fact that systemd handles init.d scripts with dependency +information natively, allowing them to run in parallel where upstart +at the moment do not.</p> + +<p>Unfortunately do systemd have the same problem as upstart regarding +platform support. It only work on recent Linux kernels, and also need +some new kernel features enabled to function properly. This means +kFreeBSD and Hurd ports of Debian will need a port or a different boot +system. Not sure how that will be handled if systemd proves to be the +way forward.</p> + +<p>In the mean time, based on the +<a href="http://lists.debian.org/debian-devel/2010/05/msg00122.html">input +on debian-devel@</a> regarding parallel booting in Debian, I have +decided to enable full parallel booting as the default in Debian as +soon as possible (probably this weekend or early next week), to see if +there are any remaining serious bugs in the init.d dependencies. A +new version of the sysvinit package implementing this change is +already in experimental. If all go well, Squeeze will be released +with parallel booting enabled by default.</p> - Endelig er Debian Lenny gitt ut - Endelig_er_Debian_Lenny_gitt_ut.html - Endelig_er_Debian_Lenny_gitt_ut.html - Sun, 15 Feb 2009 11:50:00 +0100 + Parallellizing the boot in Debian Squeeze - ready for wider testing + http://people.skolelinux.org/pere/blog/Parallellizing_the_boot_in_Debian_Squeeze___ready_for_wider_testing.html + http://people.skolelinux.org/pere/blog/Parallellizing_the_boot_in_Debian_Squeeze___ready_for_wider_testing.html + Thu, 6 May 2010 23:25:00 +0200 -<p>Endelig er <a href="http://www.debian.org/">Debian</a> -<a href="http://www.debian.org/News/2009/20090214">Lenny</a> gitt ut. -Et langt steg videre for Debian-prosjektet, og en rekke nye -programpakker blir nå tilgjengelig for de av oss som bruker den -stabile utgaven av Debian. Neste steg er nå å få -<a href="http://www.skolelinux.org/">Skolelinux</a> / -<a href="http://wiki.debian.org/DebianEdu/">Debian Edu</a> ferdig -oppdatert for den nye utgaven, slik at en oppdatert versjon kan -slippes løs på skolene. Takk til alle debian-utviklerne som har -gjort dette mulig. Endelig er f.eks. fungerende avhengighetsstyrt -bootsekvens tilgjengelig i stabil utgave, vha pakken -<tt>insserv</tt>.</p> +<p>These days, the init.d script dependencies in Squeeze are quite +complete, so complete that it is actually possible to run all the +init.d scripts in parallell based on these dependencies. If you want +to test your Squeeze system, make sure +<a href="http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot">dependency +based boot sequencing</a> is enabled, and add this line to +/etc/default/rcS:</p> + +<blockquote><pre> +CONCURRENCY=makefile +</pre></blockquote> + +<p>That is it. It will cause sysv-rc to use the startpar tool to run +scripts in parallel using the dependency information stored in +/etc/init.d/.depend.boot, /etc/init.d/.depend.start and +/etc/init.d/.depend.stop to order the scripts. Startpar is configured +to try to start the kdm and gdm scripts as early as possible, and will +start the facilities required by kdm or gdm as early as possible to +make this happen.</p> + +<p>Give it a try, and see if you like the result. If some services +fail to start properly, it is most likely because they have incomplete +init.d script dependencies in their startup script (or some of their +dependent scripts have incomplete dependencies). Report bugs and get +the package maintainers to fix it. :)</p> + +<p>Running scripts in parallel could be the default in Debian when we +manage to get the init.d script dependencies complete and correct. I +expect we will get there in Squeeze+1, if we get manage to test and +fix the remaining issues.</p> + +<p>If you report any problems with dependencies in init.d scripts to +the BTS, please usertag the report to get it to show up at +<a href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org">the +list of usertagged bugs related to this</a>.</p>