[JGuru]

@DukeNukem, A random password is set for root during Ubuntu installation. Anyway, you don't need
root password in Ubuntu. Use sudo, gksudo, gksu commands & you get the
same root permission.

For eg.,

$ sudo gedit /etc/X11/xorg.conf

Opens the file 'xorg.conf' for read/write operation. Since only root has read/write permission for this file.
You get the same access-level as root using sudo, gksudo etc.,

CAUTION: Don't edit this file (xorg.conf) unless you know what you are doing. It's being used by the Linux O.S!!

Remember you don't need root password at all in Ubuntu. Just use 'sudo', 'gksudo' commands.
Most people login as root, screw-up the Linux OS & put the blame on Linux!!