http://wiki.tauware.de/ 2010-08-21T10:54:25+02:00 http://wiki.tauware.de/ http://wiki.tauware.de/lib/images/favicon.ico text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:08-06-01-long-time-no-see?rev=1224345389 I didn't use this blog for quite some time. Too much time. I really should blog more often. In the mean time, a lot of things happened. I surely cannot list everything I did since then, but perhaps I can mention the most important things that happened recently in form of a short list. I'll try to elaborate in subsequent blog posts. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:08-06-02-bug-searching-in-launchpad?rev=1224345389 In the past, I've tried to observe myself how I work with bugs in Launchpad. In essence, I have locally a mailfolder, where mails from Launchpad go in whenever a bug I'm assigned or subscribed to get a new message. These are of course bugs I should and in most cases I actually want to pay attention for. However if one would rely on that emails it would be pretty easy to miss older bugs without activity for some time. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:64bitkernels?rev=1224345389 I always wondered if using a 64bit kernel on a 32bit distribution was a good idea. <http://permalink.gmane.org/gmane.linux.debian.devel.general/108273> gives one reason why this isn't a particulary good idea. ~~DISCUSSION~~ text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:authentec?rev=1224345389 Today, I bought an usb fingerprint device in our near supermarket . Of course Linux support isn't advertised at all, but it was reduced from 20 EUR to 10 EUR. So I decided to give it a try and see what is driving this chip. It is an Authentec, Inc AES2501 ( 08ff:2580 ), lsusb output looks like this: <http://www.qbik.ch/usb/devices/showdescr.php?id=3444>. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:blogplugin?rev=1224345389 Today, I upgraded my dokuwiki installation. With this oppurtunity, I'm now using a new theme, it is called 'minima', and can be downloaded from <http://wiki.splitbrain.org/wiki:tpl:minima>. The theme suggests using Esther Brunner's Blog plugin, which I'm currently testing with this first post. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:blogpluginrepaired?rev=1224345389 finally, I managed to repair the feed plugin. Actually, [NiKO] in the channel #dokuwiki in Freenode pointed me to the right patch: UPDATE: well, obviously the feed component still has problems with <code> blocks. Well, it seem that I'll have to be more careful in future, or fix that part of the feed component as well. Patch available here text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:bzr-builddeb-entered-feisty?rev=1224345389 bzr-builddeb has been ACCEPTed to ubuntu. It was developed by James Westby, with the help of Martin F. Krafft and others. Additional information about the project can be found on the debian wiki: <http://wiki.debian.org/BzrBuildpackage> bzr-builddeb promises to facilitate managing debian packages with bzr. It is implemented as bzr plugin, which you can either install via apt-get, or in your ~/.bazaar/plugins directory. You can see the available branches here: <https://code.launchpad.net/bzr-bui… text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:bzrxxdiffmerge?rev=1224345389 Today I found out that there is a great bzr plugin, called extmerge. Here is a small howto install and use it: mkdir ~/.bazaar/plugins bzr get http://erik.bagfors.nu/bzr-plugins/extmerge/ ~/.bazaar/plugins/extmerge sudo apt-get install xxdiff now the next time you get conflicts during merge, you can use the command bzr extmerge $conflicting_file, and xxdiff will present you THIS, OTHER, and BASE. You select each hunk you want to use in the merged file, then choose 'Save as merged' in the menu… text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:clt2007?rev=1224345389 Zeit wirds für einen deutschen Blog eintrag, so here we go. Frisch zurück aus Chemnitz, genauer von den Chemnitzer Linux Tagen . Wir sind wie letztes Jahr bereits am Freitag angereist, um die Party in der Turnhalle nicht zu verpassen. Der Rest unserer Gruppe (die Schwabacher Linux User Group war etwas früher da als wir (wir sind etwas später losgefahren), und haben schonmal kräftig vorgetankt ;) - dafür gleich in der Umkleidekabine. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:collaborativemaintenance?rev=1224345389 How does <http://www.bononia.it/~zack/blog//posts/why_i_love_collab_maint.html> relate to <https://wiki.ubuntu.com/NoMoreSourcePackages>? ~~DISCUSSION~~ text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:compressedhelp?rev=1224345389 I “just” wanted to open latex help, so I bookmarked <file:///usr/share/doc/tetex-doc/index.html>. I noticed that there are some dead links (bug pending), but more importantly, most of the pdfs are compressed with gzip, and on my disk as 'manual.pdf.gz'. How to view them? text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:create-chroot?rev=1224345389 I've crafted a small perl script for (re)creating chroots on lvm snapshots. You can find it on create-chroot. I'm not very used to program in perl, and I don't enjoy it that much. This was a small test to get used to it, so if you have suggestions and/or improvments, feel free to edit it straight away. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:cryptsetup-in-ubuntu?rev=1224345389 Yesterday I upgraded my canonical sponsored laptop to latest feisty and took another look at the cryptsetup package. It was still suffering from <https://launchpad.net/distros/ubuntu/+source/cryptsetup/+bug/62751>, but I see that Swen Thümmler prepared a patch for this: <https://launchpad.net/distros/ubuntu/+source/cryptsetup/+bug/62751/comments/37>. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:dontabortbzrtransfers?rev=1224345389 Lesson of the day: Better don't abort bzr 'pushes'. You will get very interesting but confusing messages when you try to push next time: ERROR: Lock was broken while still open: LockDir(sftp://bazaar.launchpad.net/%7Eubuntu-dev/aspectc%2B%2B/debian/.bzr/branch/lock) - check storage consistency! UPDATE: ok, it seems to be fixable with this command: text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:dynamicsquid?rev=1224345389 Yay, I finally managed to instrument Squid, the webproxy found at: <http://wiki.squid-cache.org/FrontPage>. This is for my thesis, where I implement Dynamic Aspects in C++. Now for the loading of dynamic aspects.. Update: The first dynamic aspect works! :) Here is the sourcecode of the aspect: text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:dynamictracer?rev=1224345389 This sunday, we developed a really cool dynamic tracer for AspectC++. #include <iostream> using namespace std; struct X { X (...) {} }; typedef char magically_sized_type[43564367]; magically_sized_type &operator << (ostream &os, X); template <typename T> struct detector { enum { RET = (sizeof (cout << T()) == sizeof (magically_sized_type)) }; }; template <typename T, int> struct Printer { static void print (ostream &out, const T &arg) { out << arg << endl; } }; template <typen… text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:edgyupgrade?rev=1224345389 Well, my upgrade to edgy wasn't that soft as I expected. The first install was really broken, and I had to replay a backup of /. This was partly my fault, I didn't notice that my kernel has oopsed (I have a strange usb hard drive), with the result that discover and mdadm got locked (as in state D). text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:fai-team-created?rev=1224345389 From: Reinhard Tartler <siretart@ubuntu.com> Subject: Ubuntu FAI team created To: linux-fai@uni-koeln.de, linux-fai-devel@uni-koeln.de, ... Cc: ubuntu-motu@lists.ubuntu.com Date: Sat, 15 Sep 2007 11:46:28 +0200 Hello Dear FAI Fans, since there was some interest in forming a team for maintaining fai in ubuntu and I don't have the resources to do it myself alone, I've now created a team in <http://launchpad.net>. The team homepage is at <https://launchpad.net/~fai>. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:feisty-upgrade?rev=1224345389 I finally upgraded my workstation to feisty. I intended to do this earlier, but I had to finish my thesis first. Anyway, unlinke my first attempt, I used the update-manager tool. This time, I was bitten by only 2 upgrade related bugs so far: * <https://launchpad.net/bugs/75681> * <https://launchpad.net/bugs/68467> text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:ffmpeg-uploaded?rev=1224345389 Finally ffmpeg version 0.svn20080206-9 was uploaded to unstable and is currently waiting to get out of NEW . Special thanks go out to Fabian Greffrath, for testing, reviewing and pushing me, to Lïoc Minier, for his thoughts on the package renaming and handling of potential unstripped replacement packages and Darren Salt for his work on the debian/rules file. This upload is targeted lenny. Highlights of that upload include: text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:firstimpression?rev=1224345389 After having read this, I thought about giving it a try: >> python Python 2.4.3 (#2, Apr 27 2006, 14:43:58) [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import apt_pkg >>> apt_pkg.UpstreamVersion('1.0-1') zsh: segmentation fault python Of course, it is perhaps not meant to be used that way, but the error handling isn't too impressive either. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:jabber-lost?rev=1224345389 Today an accident with my jabber account happened. Long story short: I wanted to have my icq transport removed, but lost my jabber account altogether and I had to recreate it. So for you nothing changed, I can still be reached under 'siretart@jabberme.net'. If you had me on your contact list, please rerequest authorisation and resend your authorisation. Thanks! text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:loopfileswithpartitions?rev=1224345389 http://blog.madduck.net/ asked today if it was possible to have /dev/loop0p1 devices, read: if it was possible to mount partitions of a disk image with partitions. Well, there is a patch floating around for this: <http://lwn.net/Articles/110426/>. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:lvm-recovery?rev=1224345389 What to do if your lvm volume group get damaged by bugs like lp>81841? This is what happened to me lately. Luckily, I did not loose any data, but had to recover my phisical volume. This is described at <http://tldp.org/HOWTO/html_single/LVM-HOWTO/#recovermetadata>. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:masterthesis?rev=1224345389 Today, I started 'officially' my master thesis. It has the working title “Familienbasierte Infrastruktur zum Weben von dynamischen Aspekten in C++ Programmen”. (english: “Family based infrastructure for weaving of dynamic aspectcs in c++ programs”). I've choosen to write it in german. The deadline is now fixed: Dec. 13, but I intend to finish it more quickly. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:motu-new-face?rev=1224345389 Jono, the ubuntu community man is writing about how make our MOTU group more attractive for newcomers. I think he's right, the current motu wiki site is really a mess, I very much like the Sample Team Page he is proposing. And he is of course right that we should all blog more about ubuntu and MOTU related stuff on planet.ubuntu.com. Well, here we go :) text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:moving?rev=1224345389 There have been a really long time since my last blogpost. You might have noticed that I'm not as active on IRC and elsewhere than I used to be, and the reason is: I've moved! The last 2 weeks I spent with preparations of the move. In paralell, I had to work on both my thesis and my job, so the last 2 weeks have been quite busy. We're still not really finished, but things are getting better now. I even started to work on xine for ubuntu ;) text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:qemuedgy?rev=1224345389 Of course everyone else already knows how to get the qemu accelerator module running. Here some notes how to do it on edgy: wget http://fabrice.bellard.free.fr/qemu/kqemu-1.3.0pre9.tar.gz cd kqemu-1.3.0pre9 sudo apt-get install linux-headers-$(uname -r) ./configure make sudo make install modprobe kqemu Non-Free, but pretty painless to install. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:revu?rev=1224345389 Scott Kitterman <ubuntu@kitterman.com> writes: " Why do REVU and mentors need to be separate?" I've been thinking about this as well. Here my thoughts: I never actively used mentors. To me, mentors is mainly an apt-get'able repository, where interested contributors can submit packages. It acts mainly as a hosting service for packages. There are quite some differences to REVU, but I think the most important one is that REVU lets you collect opinions on a contribution in the web application. … text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:securelaptop?rev=1224345389 Uwe Hermann schreibt wie man einen halbwegs sicheren Laptop aufsetzt. Ob das übertrieben ist oder nicht muss jeder für sich selber entscheiden. Einige Punkte finde ich jedoch durchaus sinnvoll. Werde das bei meiner nächsten ubuntu Installation sicherlich versuchen nachzuvollziehen. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:shm_in_linux?rev=1224345389 Gerade konnte mir Simon Richter (aka GyrosGeier) in #debian.de erklären können, warum viele Linuxdistributionen ein /dev/shm als tmpfs mounten. Kurz: es wird für Implementierung von shared memory gebraucht. Es muss nicht unbedingt in /dev/shm gemountet werden, sondern es ist nur wichtig, dass es im System mindestens ein tmpfs gibt. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:ssh-proxy-command?rev=1224345389 While browsing through ssh_config(5), I stumbled over the option ProxyCommand, which allows specifying an arbitary command for establishing the connection to the remote sshd. While the manual gives the example of using netcat to connect through an http proxy, I was thinking about something else. At home, I'm using an openwrt router , which offers a dropbear sshd , from where I can connect to my workstation at home. In order to faciliate this, I added this tho me ~/.ssh/ssh_config: text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:thesis-finished?rev=1224345389 If you are curios why I've been so silent lately, here is the reason: I had to finish my thesis this monday. The rest of the week, I've been doing the most important things which didn't get done the last 2 weeks, like visits at doctor, my future job etc. pp. Oh, and my girlfriend, Kathrin, had birthday on monday as well! :) text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:toomuchtime?rev=1224345389 Sometimes people seem to have too much time: <https://launchpad.net/bugs/62176> ~~DISCUSSION~~ text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:vcs-packaging?rev=1224345389 I've had a discussion on the way to LUG-Camp 2007 with Sebastian Harl about how to properly manage debian package in a VCS. We identified several ways of doing this. Since I expect modifications to the article I've written, I've moved it to vcs-packaging. Please give me feedback to the article, either in the form below or via email. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:webserve?rev=1224345389 Today, I've seen how pretty hg can visualize branches, like darrens http://zap.tartarus.org/~ds/gxine/. I was wondering if something similar existed for bzr as well, and I found something on the bzr>PluginRegistry, namely the webserve plugin. After some fighting that the default python in 2.3, but bzr plus all plugins require 2.4, I finally got it working. Have fun here: <http://siretart.tauware.de/xine-repo> text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:wikispam?rev=1224345389 In the last days, I noticed some commentspam in my wiki. I think I'm fairly conservative with my acl settings in tauwiki , and it used to work out quite reasonable. In the last days and weeks, I noticed increasing commentspam. I'd rather not restrict commenting altogether, because I love good comments. However when the traffic of spam becomes bigger than the traffic of serious contributors, I'm beginning to rethink about it. text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:xboxlinux?rev=1224345389 Puuh, this weekend, we finally got round 'repairing' my girlfriend's xbox (Rev 1.6). We tried to install it over 6 months ago, but failed. In the end, I think this was because of bad media (the xbox is very picky about media. CD-R's won't work at all, CD-RW did boot, but well. DVD-R seem fine, though). text/html 2008-10-18T17:56:29+02:00 http://wiki.tauware.de/blog:xineuploaded?rev=1224345389 Yesterday, I finally got xine-lib 1.1.1-2 and xine-ui 0.99.4 uploaded. Sesse was so kind of reviewing and actually uploading my changes. The RC Bug count for xine-lib dropped to 0, xine-ui still has some bugs, which I need to investigate further. At least debbugs>372172 looks like quick action is needed. The other bugs seriously need triaging...