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 …

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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 …

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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 …

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Recently I discovered the following hint in the vCenter service state overview: Apparently there was a issue with the integrated LDAP service of the vCenter Server Appliance - unfortunately I was not very successful when researching the internet with the appropriate error message: LDAP data backup subcomponent error: …

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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 …

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A couple of days ago I stumbled upon a blog article by Duncan Mac-Vicar - it was all about a very interesting concept to modernize the web interface of Spacewalk. With great interest I have taken note of that a combination of defacto standards like Twitter Bootstrap, jQuery and HTML5 was used to pretty up the frumpy …

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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 /etc/sysconfig/rhn/osad.conf.rpmnew If you're …

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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 …

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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 - …

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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 …

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