[newbie] how 2 change 2 command line

[nomad creaktop]

OK, I want to do some administrative things that I need to do on command 
line, without X running (like sndconfig, etc.) In the installation 
(Custom), I selected to boot to X. Is there an easy way to exit X, either 
during boot, or afterwards (preferable). I haven't found anything in the 
application launcher ...

TIA

creaktop