Originally Posted by jailbait
Change the default runlevel in /etc/inittab.
I thought Ubuntu got rid of the inittab? I'm running Hardy Huron and I know I don't have it. There is more about it being gone here: http://www.linuxquestions.org/questi...nittab-506281/
Besides, even if you change the default runlevel, all runlevels in Ubuntu have the GUI enabled by default (other than single user mode), so changing the runlevel wouldn't disable it either.
The best fix I could find quickly was here: https://lists.ubuntu.com/archives/ub...ly/087620.html
Basically if you change the file /etc/X11/default-display-manager to say "false" instead of "/usr/sbin/gdm" (or whatever it is you are using), it will disable the GUI on startup. This fix is for ubuntu, so it should be pretty similar for xubuntu.