[Ubuntu] use root to log on to Ubuntu

By default, UBUNTU does not allow users to log on as root. Although it is secure, it is not in line with the nature of my system. The method found on the internet is as follows:

1. First set the root password, use the existing Administrator Account to log on to Ubuntu, execute the command: sudo passwd root on the terminal, then enter the password and root password, and repeat the password. In this way, a root user is available.

2. By default, you are not allowed to directly log on to the GUI using the root account. This allows root to log on directly by modifying the/etc/TPD. conf file. In this file, change allowroot = false to allowroot = true to switch the user.

Note: In some systems, the default value of GMS. conf is read-only. Before modification, you can use sudo chmod 777/etc/TPD/GMS. conf to modify the file permissions.