“It is forum policy not to tell users how to do this…”
Well, it’s this forum’s policy to tell you how to do anything and everything!
In Ubuntu, open a terminal and type the following code:
sudo passwd root
Hit the Enter key.
Enter the password and then retype the password to confirm. Close the terminal.
Got to System > Administration > Login Window under the menu bar. Click on the Security tab and place a check mark next to “Allow local system administrator log in”. Close the Login Window application and reboot.
You can now log in as root using the password you entered earlier.
This same procedure also works in Linux Mint. However, the “Allow local system administrator log in” box is already checked by default. But check your system anyway, just to make certain.
Take that Secret Ubuntu Society!
(See? This is the kind of thing that gives Linux a bad name.)