Frag is bigger than frame.

Since 2 weeks I'm faced with some problems at a Xen [http://en.wikipedia.org/wiki/Xen] hosting environment based on Debian [http://www.debian.org] wheezy [http://www.debian.org/releases/wheezy/]. The issue is, that one specific domU is regularly failing network. The investigations showed, that no network…

Debian (wheezy) 7.x and mailscanner

Mailscanner [http://www.mailscanner.info/intro.html] is an e-mail security and anti-spam solution for e-mail gateways. In combination of postfix [http://www.postfix.org] it uses a very ugly way [http://www.mailscanner.info/postfix.html] messing around in postfixs queue directories. Anyways .. if you are still interested, keep…

500 OOPS: vsftpd: refusing to run with writable root inside chroot ()

If you updated recently your system to Debian [http://www.debian.org] wheezy [http://www.debian.org/releases/wheezy/] and you are using vsftpd [https://security.appspot.com/vsftpd.html#about] with enabled chrooted local users ... [~] # grep -i ^chroot_local_user=yes /etc/vsftpd.conf | tail -1 chroot_local_user=…

Chemnitzer Linux-Tage 2013!

Also this year the Debian [http://www.debian.org/about/] project was present at Chemnitzer Linuxtage [http://chemnitzer.linux-tage.de/2013/], this time right next the debianforum.de [http://debianforum.de] booth. The booth folks arriving on Friday organized a flashmob at Expitas [http://espitas.de] after booth setup. Unfortunately…

Chemnitzer Linux-Tage 2013?

Also this year I registered a booth [http://chemnitzer.linux-tage.de/2013/live/191] in the name of the Debian Project [http://www.debian.org/] at Chemnitzer Linux-Tage [http://chemnitzer.linux-tage.de/2013]. Unfortunately this is the second [https://log.cyconet.org/2012/02/26/booth-at-chemnitzer-linux-tage-2012-clt14/] time in the row,…

Airprint support broken in Debian wheezy?

Some of our customers are using central CUPS [http://www.cups.org/] systems for managing their printer infrastructure. In the last years the demand for support printing (called Airprint [http://en.wikipedia.org/wiki/AirPrint]) from mobile apple products increased. This worked well for us on Debian [http://www.debian.…

Learning Git Branching

If you are comming from an old SCM like subversion, you may have difficulties to internalize the new workflow. Peter Cottle [http://petermcottle.com/] created Learn Git Branching [http://pcottle.github.com/learnGitBranching/] which is really nice.…

Server Management

Server management on daily basis in a growing environment could be a challenge. Most of the tasks is here done with ClusterSSH [http://clusterssh.sf.net] in help with a homebrew mail notification [http://ftp.cyconet.org/debian/archive/restricted/config-apt-update]. Unfortunately this workflow is not scaling well for 200+…