[ALUG] How to enable WiFi from cammand line on eeePc?

I have an Asus eeePc 701 running Ubuntu 10.04, no GUI just the base installation plus a few bits I needed. We now have WiFi available on the boat (where the eeePc is) and so I want to use it from the eeePc - does anyone know how to do it? The eeePC sees the Wifi as an ifconfig returns some information about it, what command line tools etc. do I need to configure it? The WiFi is pretty standard with "WPA & WPA2 Personal" security. -- Chris Green