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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Sometimes it is necessary to break down the patch status of the Linux landscape. Especially if the administrator's work is subjected to security standards a constant documentation of maintenance tasks is often necessary. Using Spacewalk, Red Hat Satellite or SUSE Manager available patches are described as errata. Those …

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Recently I finished my first ArchLinux installation since 2010. Many things have change since I used the distro the last time and I felt a little bit helpless first. The former ArchLinux installer isn't used anymore - the experienced Linux user has to prepare the hard drives for the installation on his own. The …

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When a upload/download of a particular virtual machine on a VMware vSphere ESXi host is not working a common issue is that required network ports are not opened (yeah, it's "always" a firewall issue!). It makes no difference whether you start the process directly on the ESXi host or on a VMware vCenter …

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Recently I had a issue when trying to use the OSA dispatcher integrated in Spacewalk, Red Hat Satellite and SUSE Manager. The software was unable to push actions to registered client systems - it seems that there was a problem with the appropriate service: 1# service jabberd status 2router dead but subsys locked 3sm …

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Recently I stumped upon the following error while creating GPG keys for signing self-created RPM packages : 1can't connect to `/home/su-rpmdev/.gnupg/S.gpg-agent': No such file or directory 2gpg-agent[14392]: command get_passphrase failed: Operation cancelled 3gpg: cancelled by user 4gpg: Key generation …

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