Hi, if you are referring to it as Administrator mode, you might want to be very very careful with root, it can be very dangerous to the machine as you can easily run a command like "rm -rf /" that will almost certainly break a linux system if it doesn't warn/stop you (similar to format C: in windows/DOS).
Originally Posted by jschiwal
Using sudo for each command may be better than using "su -". If you use Ubuntu, the root account is disabled and "su -" won't work anyway.
I would bet their is a back door somewhere, excluding single user mode... something probably like "sudo /bin/sh"... but I dunno, I don't use ubuntu (their anti CLI ways gives me the creeps =/) but I'd probably figure out a way if I had to use it.