If you're maintaining your system landscape with Spacewalk, Red Hat Satellite or SUSE Manager you might also see many old entries while having a look in the action list after a while:

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A couple of days ago I spent a lot of time with Kickstart under Spacewalk and Red Hat Satellite and was looking for a possibility for creating Kickstart Trees for CentOS comfortably.

Radomly I stumbled upon a blog article which served a useful script. That inspired me to create a more handy python script for that. …

Sometimes it is sufficient to know which RPM GPG-Keys have been imported. You can get this information with the following command:

1# rpm -qa --qf '%{VERSION}-%{RELEASE} %{SUMMARY}\n' gpg-pubkey*
2c105b9de-4e0fd3a3 gpg(CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>)
3 …

There are several OpenJDK versions for running Java applications under Enterprise Linux. This is adequate for the most applications but in some cases you might need the proprietary version by Oracle (e.g. because of support matrices of commercial third-party software).

On the JRE webseite you can find tarball and RPM …

A couple of days ago I stumbled upon the following error message while activating Fault Tolerance on a particular virtual machine:

Replay is unavailable for the current configuration.

First I wasted time by verifying the following topics:

• checking the VM configuration (vCPUs, OS support, disk provisioning,...)
• tested …

If you want to create and sign RPM packages for Enterprise Linux 5 and 6 you will have to consider some things while creating and using the GPG key so that EL5 systems can also use the signed packages.

If you create a GPG key using the standard settings and sign a RPM package under EL6 you will get the following error …

A couple of days ago I stumbled upon something I nearly forgot: SUSE Linux Enterprise Server for VMware.

This is a slightly customized version of SUSE Linux Enterprise Server (SLES) created 2010 during a cooperation between VMware and Novell. The most interesting thing about this is that this version is completely …

VMware published a very useful tiny helper named vSphere Mobile Watchlist. The smartphone application is designed to be used for monitoring and controlling running virtual machines.

To avoid beeing overwhelmed by a endless list of virtual machines (of course this depends on the size of your virtual environment) the …

Recently I discovered the following hint in the vCenter service state overview:

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During a recent system update that I started using Spacewalk I stumbled upon the following error message:

1Fatal error in Python code occurred [[6]]

After some troubleshooting I came up that I upgraded my spacewalk server to the most recenet release a couple of days ago. During this update I forgot to update also the …