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 …

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 …

Winter time is crafting time! I spent the last couple of days on the Raspberry Pi and PIR sensors (Passive Infrared). Using this sensors it is possible to recognize motions - in combination with GPIO APIs you can create useful applications.

The first idea that came in my mind was to monitor my washing machine in the …

Especially in Microsoft-embossed environments it might be needed to send and receiver mails over Exchange. Some graphical mail clients like Evolution are offering support for this - of course this is not a good solution for servers without graphical user interfaces.

DavMail is a Java-based platform-independent software …

When hard drive sizes are altered the Linux kernel isn't informed about these changes automatically. Rebooting the system is a possible solution - but often no option.

Beneath the directory /sys/class/scsi_disk you will find additional files controlling some of the device's function depending on the SCSI id. Using the …

GitHub is a very comfortable portal to collaborate source coces. The service manages versions using Git - for documentation purposes bugs and wiki contents can be provided. Especially the open-source scene uses the service a lot but for internal, non-public developments it is only partially suitable.

Premium users are …

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 …