While booting a virtualized cluster node I stumped upon a suspicious error message recently: Module DiskEarly power on failed to lock file In the VMware forums I found a hint that locking mechanisms might account for this issue. However the thread focussed on desktop products and not on vSphere. I found no lock files …

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Koukaam NETIO power outlets offer a network interface that can be used for controlling the particular ports comfortably. It would be even nicer to monitor them with Nagios or Icinga. 2012 I created a provisional bash script for monitoring the ports and time synchronization over NTP. This weekend I migrated the script …

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Because of a recent comment on this blog I stumbled upon an interesting Abandonware webseite. For me this was a reason for diving into a world of forgotten software (thank you very much for the hint, Frank!). While browsing the software archive I vividly recalled my first steps with the computer. Back then - in …

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While testing a web application that uses PHP PDO to establish a connection to a PostgreSQL database I stumbled upon the following error message: 1Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[08006] [7] FATAL: Ident authentication failed for user "user"' in xxx.php Surprisingly I was able to …

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If you haven't used an Oracle database for some time you might stumble upon the issue I just had: all internal user accounts were locked and I also didn't know the passwords. By default login information of internal users are invalid after 180 days. The following accounts are important to me on my Oracle 11gR2 Database …

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This week VMware introduced plenty of new, long-awaited product versions during an online event. I also joined this event to see the further development that was taking place since VMworld 2014. vSphere 6 The biggest highlight was vSphere 6 - in accordance with VMware this is the "biggest release ever". With this, a …

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Recently I stumbled upon various PHP errors while using the free analytics software Piwik: 1PHP Fatal error: Allowed memory size of 2442473628 bytes exhausted (tried to allocate 64 bytes) 2... 3Fatal error: Maximum execution time of 30 seconds exceeded in .../piwik/core/DataTable.php The solution is quite simple - the …

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Doing a recent Wordpress theme installation I stumbled upon a problem which could have taken much time to fix it. The theme I installed offers multiple sidebar configurations (left, right, none). There is no default settings which means that it is necessary to set the sidebar configuration for every particular blog …

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After a recent update to CyanogenMod 12 (Android 5.x) I realized that the storage for apps is quite tight. The reason for this is that the recommended GAPPS (Google Apps) need a lot of space. Beyond some useful applications this package also includes much "crap" that is unnecessary. You might run out of space if you …

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This week one of the SUSE Linux Expert Day events that are taking place worldwide since september 2014 was hosted at 25hours Hotel Frankfurt by Levi's - a very stylish and fancy location! Agenda The event was planned for 5 hours and consisted of many interesting talks: Keynote - Michael Jores, Regional Director Central …

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