[ubuntu-za] X server

[Robert Holm]

Hi All

I wish to update the driver for my NVIDIA graphics card and 
the installation instructions include the following:

"Prior to beginning the installation, you should exit the 
X server and kill all OpenGL applications. You should also 
set the default run level on your system such that it will 
boot to a VGA console, and not directly to X. Doing so will 
make it easier to recover if there is a problem during the 
installation process."

I have spent hours going through all the relative man pages 
(and learnt a lot in the process) but without finding out how 
to do either of the above, or what run level would be appropriate.

Can someone please assist.

Regards
Robert