01-07-2010
5,521,
335
Join Date: Dec 2008
Last Activity: 28 March 2014, 8:35 AM EDT
Location: Vienna, Austria, Earth
Posts: 5,521
Thanks Given: 38
Thanked 335 Times in 308 Posts
Again: by default the root user on Ubuntu is made unavailable by setting a random password. That's because the philosophy of Ubuntu is not to confuse the user with differentiating between a regular user and root.
For that reason, Ubuntu uses sudo instead of su for anything that requires administration privileges. sudo, by default, asks for the password of the user trying to run a command, instead of the password of the user you're trying to run as. So if you're logged in as user 'bdiwakarteja', sudo will ask for the password of the user 'bdiwakarteja', not for the root password.