[Ubuntu-SG] Global proxy command?

[Mark Philip]

Hi all,
I use my XUbuntu distro in VMWare, and depending on where I am, I need 
to set up the proxy server so that I can access outside of my work intranet.

This is easy enough whilst using applications such as Firefox, but how 
do I do this via the command line? (i.e. globally)

For example, I work in Temasek Polytechnic and the proxy server here is 
tp.edu.sg, port 80.
How do I specify this to work from the command line, so that 'apt-get' 
will work?

Thanks for the advance info, - sorry as I'm a newbie to XUbuntu.
-- 
Best,
Mark.

Composed using Thunderbird on XUbuntu 7.04,
Via VMWare Server on Lenovo T60 hardware.