I set up an ext3 partition on another hard drive, then amended /etc/fstab and added the following line:
/dev/hdb1 /home ext3 nodev,nosuid 0 2
This allows me to keep my home folder and update my operating system independently.
I had to have a folder named jonny at the root of ext3 partition so that /home/jonny would exist when logging in to Kubuntu. I created the folders and partitions using a combination of Gparted and the Kubuntu Live CD.
