The following slideshare will walk you through the installation of a Cassandra (1.2) node on an Ubuntu (12.04) server. It will teach you to configure LVM, XFS, /var/lib/cassandra/data and /var/lib/cassandra/commitlog directories. It will also teach you how to install OpsCenter (FREE) from Datastax to help manage it all.
The slides are based on a talk given at the Toronto Cassandra Meetup on August 7th, 2013 by myself, Victor Anjos. View them after the jump.