SQLite3-Ruby Gem Version Issues on Red Hat Linux and CentOS

So you are attempting to follow earlier instructions on installing SQLite3 to use with Ruby on Red Hat Enterprise Linux (aka RHEL) or CentOS 5 and you get the following error: gem install sqlite3-ruby ERROR:  Error installing sqlite3-ruby: sqlite3-ruby requires Ruby version > 1.8.5 Don’t worry, you are not alone.  What has happened is that …

Mounting and Unmounting CD and DVD Images in Xen

A simple, but often hard to figure out, task with virtualizing with Xen is learning how to mount and unmount, dynamically, CD and DVD image files, also known as ISOs.  This is actually quite simple but the commands are unintuitive.  The first step is to download the ISO file that you while to mount and …