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OpenStack Cloud Computing Platform: Installation and Configuration

In our quest to install OpenStack, we run into this thingy  # keystone user-list Expecting authentication method via    either a service token, –token or env[SERVICE_TOKEN],    or credentials, –os-username or env[OS_USERNAME]. #  

Enable core dump files on Linux

Here's how to enable core dump files to write for analysis on application crashes: # cat  /etc/sysctl.conf|grep core # Controls whether core dumps will append the PID to the core filename. kernel.core_uses_pid = 1 # Core patterns, if you want to write to directories other then where the process is currently running from (which could [...]

Linux / Akonadi: The QtSQL driver ‘QMYSQL’ is required by your current Akonadi server configuration.

PROBLEM Another day brings another bug. This time it's with the Akonadi server failing or unable to start.  This error followed a recent update I've done on my Fedora box.  This is what greeted me each time I started up KDE: The QtSQL driver 'QMYSQL' is required by your current Akonadi server configuration. The following drivers [...]

Web and Networking: Securing the Apache HTTPD (port 80) configuration from malicious scans.

It's still a surprise to most just how much scanning and probing by either hackers or malicious software is going on on the web when they do find out.  I mean, do you really know how many times your workstation or home network get's hit by attempted intrusions and invasions?  I was never able to find [...]

KDE 4.X and Fedora 9+: The taskbar is gone.

PROBLEM The task bar panel is gone, disappeared or has been removed/unconfigured part of some configuration change as a result of an upgrade or update.  This is one issue I had when upgrading from Fedora 8 to Fedora 9 and was mostly due to extensive overhaul of the KDE 4.1/4.0 over it’s predecessor KDE 3.5.  [...]

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