Thank-you for reading this. I am stuck at step three on this tutorial pertaining to installing Cassandra: http://wiki.apache.org/cassandra/GettingStarted#Step_3:_Start_Cassandra
Give the user you want permissions to the data and commitlog dirs.
sudo chown -R cassandra:cassandra /var/lib/cassandra/data sudo chown -R cassandra:cassandra /var/lib/cassandra/commitlog