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 ( …

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 …

Last week I had the chance to drive a Mercedes-Benz E class. For me it was the first Mercedes-Benz at all that I drove. Of course I took the opportunity to have a deeper look at the car and summarize my impressions.

Technical data

The car's basic data looked like this:

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 …

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 …

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 …

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 …

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 …