You were doing it correctly. I just tried it, and it worked for me. Are you logginto the machine in an admin-enabled account? Check "Accounts" under System Preferences. --Steve At 12:22 PM -0400 8/1/03, Mike Tweedie wrote: >How does one use terminal in SU (Super User) mode? I type in su at the >prompt, and then an admin pwd, and it spits me back out!? > >I want to vi some files.... (I know, I know, but I am an old UNIX guy)