Installed Ubuntu Desktop on Server 9.04, now can I exit the desktop and run only from prompt?

I'm a newbie, so sorry if I'm asking a dumb question :)

I've sucessfully installed Server 9.04 with the intent of running VMware 2.0 server.

I've successfully installed the Ubuntu Desktop, which I intend to use only for maintenance purposes, Most times I'd rather boot into the prompt and manage VMware remotely.

Once I've installed the Ubuntu Desktop, is there a command to exit the desktop and go back to prompt only?

running in terminal mode

at the desktop just hit ctrl+alt+f1 (or f2-f6)

terminal mode

ctrl alt f1 thru f6 6 terminals to choose from
ctrl alt f7 to go back
I think exit works as well