SUSE Linux Expert Day 2015 Frankfurt

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 Europe
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Short tip: VMware vSphere “Module DiskEarly power on failed to lock file”

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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 (*.lck)
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Short tip: Monitor Koukaam NETIO PDUs with Nagios / Icinga

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 to Python and
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vRetro trip: MS-DOS 6.22 and Windows 3.1 in 2015

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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 1993/1994
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Short tip: My Spacewalk article series

The current issue of freiesMagazin 03/2015 also included the fifth and last part of my article series about Spacewalk, Red Hat Satellite und SUSE Manager. A collection of all links for interested first-time users : “Einführung, Übersicht und Installation” (freiesMagazin 08/2014) “Registrierung und Verwaltung von Systemen” (freiesMagazin 09/2014) “Automatisierung und Kickstart” (freiesMagazin 11/2014) “Verwaltung von
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Short tip: PostgreSQL error “SQLSTATE[08006] [7] FATAL: Ident authentication failed”

While testing a web application that uses PHP PDO to establish a connection to a PostgreSQL database I stumbled upon the following error message: Fatal error: Uncaught exception ‘PDOException’ with message ‘SQLSTATE[08006] [7] FATAL: Ident authentication failed for user “user”‘ in xxx.php Surprisingly I was able to create a connection using the console with the
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Oracle XE: reset locked users

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
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Short tip: Piwik timeout/memory issues on managed web servers

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Recently I stumbled upon various PHP errors while using the free analytics software Piwik: PHP Fatal error: Allowed memory size of 2442473628 bytes exhausted (tried to allocate 64 bytes) … Fatal error: Maximum execution time of 30 seconds exceeded in …/piwik/core/DataTable.php The solution is quite simple – the memory limit and timeout settings need to
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Apply particular WordPress post meta settings database-wide

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 post – otherwise the
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