Hint from january 2015: the bug has been fixed in the meantime. I found out that it is currently (11/01/2014) impossible to run osad (Open Source Architecture Daemon) with SELinux enabled on EL6.6 and EL7 systems. The following error message can be seen while starting the service: 1# service osad restart 2Shutting down …

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Attentive readers of my blog or Twitter feed might have seen that I'm also spending my time on OS X relevant topics for two months. The reason for this is that I switched the operating system of my notebook from Microsoft Windows to Mac OS X. Why? To be honest there was no crucial reason for switching. Since my …

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Last week the european VMworld event was taking place in Gran Via, Barcelona. The program of the 4-day conference was characterised by virtualization and especially VMware products. VMware hosts two events every year - in the USA and Europe. I had the honour to join this event as press member which gave me the …

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When running a virtualized vCenter server it is very important to have a working backup. If the vCenter server crashes the virtual landscape cannot be managed or monitored. Configuring backup is very easy when running VMware vCenter Server on a conventional Microsoft Windows servers because it is a fully-features …

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A couple of days ago another security vulnerability that applies to Linux systems called PODDLE was announced. Less serious than Heartbleed especially web servers that are still allowing SSL generations 2 and 3 are affected. Because of a bad security design it is possible to decrypt transfered data. Often those …

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Yesterday Red Hat released another update of its Red Hat Enterprise Linux major release 6: 6.6. Like for the minor updates before many optimizations and some "technical previews" were implemented. The changes have been documented well in the release and technical notes: Release notes: …

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The Apple App Store is not the only way to installation additional applications under OS X - another way is to install .pkg files (which have been created by the Apple Installer Framework). Unfortunately not all applications installed using these files are present in the "Programs" category inside Finder. …

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Many software cluster solutions require shared storage between all cluster nodes. A very prominent example for this might be Oracle RAC (Real Application Clusters). In enterprise environments shared cluster storage is often implemented using SAN storage that is connected to multiple systems. For (private) test …

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Hard drives can be forced into hibernate using hdparm. While it was quite easy to implement automatic setting this hibernation values by inserting the appropriate command (hdparm -B intervall device) into /etc/rc.local (which was executed after the boot) on sysvinit-based Linux distributions this changed on newer …

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When a RAID controllers cache battery fails it is a benefit if you can gather the spare part number without any downtime. If your server is equipped with a HP SmartArray controller you can easily get t hose information using the sautil utility. This requires the HP-UX products RAIDSA and RAIDSA-PROVIDER to be …

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