How to switch to ROOT users in Ubuntu

if you have used debian before, you should know that there is a "su" command allowing you to get ROOT permission.
unfortunately, in ubuntu, it seems that they have banned the root login. so knowing you didn't set a password for root user, you still have no way to get in as a root user.

there are nifty ways to accomplish that.

1) there is a root terminal, go to the manu bar =>applications=>system tools=>root terminal.  use your password to get into it.

2) use the normal terminal, type in "sudo su" to switch to ROOT user.