Issue
Some Ubuntu VPS servers do not come with an /etc/sources.list file.
(Version 8.04 includes this in the /etc/apt directory)
Solution.
A generic template file is used for creating VPS servers and as such, the
sources.list file is left for customers to create as they wish.
You may use any valid repository server in this file.
If you create your own sources.list file it is important that you exclude kernel
and/or kernel module updates as these updates are performed by Net24 and will
affect the stability of your VPS should you install updates yourself.