Since I run my Suns mostly as application servers, I don’t need no X Window System and for sure I don’t need a graphical login screen. It took me a while to find this but actually disabling the login server is quite easy:
/usr/dt/bin/dtconfig -d
Likewise, to enable the login server again, you’d use:
/usr/dt/bin/dtconfig -e
In case you’re already using the CDE and want to get rid of it in an instant, you might want to try
/usr/dt/bin/dtconfig -kill
