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 …

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 …

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 …

Often configuration files are also updated during the installation of newer RPM packages. Using the package manager yum you're informed about that like this:

1# yum update
2...
3  Updating   : osad-5.11.33-1.el6.noarch                                  13/32
4warning: /etc/sysconfig/rhn/osad.conf created as …

To find out the World Wide Name / World Wide Identifier of a Fibre channel controller under Linux you actually have multiple possibilities.

A very common way is to read the /sys directory. In this virtual file system there are e.g. special files which contain further information about the hardware. Below the folder …

Sometimes it is necessary to patch the Linux source code - e.g. after new drivers or security bugfixes have been applied.

As a rule this task is done by your chosen distributor - but maybe you don't want to wait for that (or you like doing this on your own).

I'm currently preparing myself for the LPIC-2 certification - …

When updating the GRUB2 package on a clean install of CRUX Linux I recently stumbled upon the following error:

1# prt-get update grub2
2...
3Pkgfile: line 28: ./grub-mkfont: No such file or directory"

The solution for this issue was simple - the freetype package was missing. This package is needed for generating …