Ubuntu12.04 Root Login

1. Enter Sudo-s in the terminal window, enter the login password of a common user, and press enter to enter the root user permission mode.

2. Run sudo gedit/etc/lightdm. conf # Add the following content to the open file:

Greeter-show-manual-login = true # manually enter the user name and password for logging on to the system

Allow-Guest = false # logon from guest is not allowed

3. Run sudo passwd root to enter the password of the root account as prompted.

4. Restart ubuntu. The "login" option will be displayed in the logon window. At this time, we can log on through the root account.