Today I added two new cheat sheets: RHCE Cheat Sheet RHEV/RHCVA Especially the RHEV/RHCVA cheat sheet is not very comprehensive, but maybe it is still a little helpful when learning for the RHCVA exam. Enjoy!

At the end of October, I passed the RHCE exam here in Germany. It was a very pleasant experience and I used the book “RHCSA/RHCE Red Hat Linux Certification Study Guide (Exams EX200 & EX300)” from Michael Jang for preparation. On 1072 pages, Jung covers all the objectives of both the RHCSA and RHCE exams. [...]

During the last days, the official Xen blog published two really amazing articles about Xen virtualization in detail. Both of them take a look at paravirtualization, HVM and the difference between 32 and 64 Bit guests. You can find part one of the article series here: The Paravirtualization Spectrum, part 1: The Ends of the [...]

Am 2. November 2012 erscheint in Deutschland offiziell die aktuelle Ausgabe des Linux Magazins. Darin enthalten ist u.a. mein Artikel über Cfengine 3.4.0 und die Neuerungen in der Community Edition, der vor allem das neue Posix-ACL-Feature näher beleuchtet.   Ich bedanke mich herzlichst beim Linux Magazin für die erneute Gelegenheit, einen Artikel in dieser Zeitschrift [...]

Today I added three more cheat sheets: LPIC-1 Module 101 LPIC-2 Module 102 RHCSA All of them are partly in German and were copied from my private Wiki. I hope you find them useful and please let me know if you have any feedback for me.

In one of my previous blog posts I wrote about a very simple package management solution with Cfengine 3. Of course installing new packages is only one tiny part of really “managing” packages. But even this little step could fail if the according sources.list file is not correct. So todays’s part of the Cfengine 3 [...]

Many Linux sysadmins have in common that working with configuration and other text files is part of their daily work. In my case, I often migrate older Linux boxes to our own Ubuntu fork. Therefore it is required to also use old configurations where it makes sense. When configuring and testing the applications on the [...]

Ever needed to find out what hardware runs a specific server without knowing anything about this system? Well, this happens to me from time to time. But since we are Linux sysadmins we know that there are possibilities to find out what we are dealing with. Let’s assume you are currently in such a situation [...]

Today I am starting a new series of blog posts: “Tools for Linux sysadmins” The first blog post will cover ethtool, one of the most useful tools to handle network cards since it gives you full control about the cards’ settings and other stuff. I mainly use it for two things: Reading out the firmware [...]

Today I played around with the Python MAPI interface and found some Zarafa MAPI documentation. Since I have to do with Zarafa on a regular basis, I found it interesting to access the inbox via MAPI and Python. I wrote a little script which does exactly that: After you provided the login credentials, the script connects to [...]