Good to have you here. And welcome to my relaunched web site. The previous (Drupal 7-powered) site was increasingly broken. But I did not want to wait for Drupal 8 to be finally released. So I am now using the CMS that I railed against most - Wordpress. I hope you enjoy the new layout and the refurbished articles.

If you are looking for my blog about the Motorrad-Führerschein please check out my personal site:

ISPmail tutorials

The famous ISP-style mail server tutorials live here. Learn how to set up your own fully-functional mail server using Postfix, Dovecot IMAP/POP3 and MySQL backend on a Debian server just like your favorite mail or website hosting provider.

I have been maintaining the ISPmail tutorial since Debian Woody. However those older Debian versions are no longer supported. If you still like to read the old versions I have provided PDF versions of the tutorials for Squeeze, Lenny, Etch, Sarge and Woody.

Thoughts blog

My projects

I am a system administrator and programmer. In my nerdy spare time I work on web applications, Python and Ruby programs, write articles or explore new software technologies. On you can find news, solutions and hints on my findings and get help. Of course your feedback is welcome. And to keep this site free from ads a small donation is appreciated.

These are some projects I am currently working on:

IRC – Internet relay chat

  • IRC is a great medium for getting instant help (at least on the freenode IRC network). I have collected some tips about Getting help on IRC to help you get help instead of getting barbecued.
  • knoba's factoids
    I run a bot called knoba (short for knowledge base) on the freenode IRC network. Two channels I visit frequently are #postfix and #squid. So I have fed the bot with lots of factoids that you can query using !foobar in the channel. These are the factoids understood in #squid and #postfix. Please don't play with the bot publicly. Send it a "/msg knoba help" and learn how it works.

Linux tips

Regarding the Squid web proxy

Padrino web framework

Zabbix monitoring

Zabbix is a mighty open-source monitoring software. If you need a serious system for your organisation and manage to condone its creepy web interface it is hands down the the most superior software I have ever seen. And I have been dealing with monitoring software since Nagios was called Netsaint.

These articles should help you in your daily work maintaining a monitoring system: