This article covers how to enable and disable root user account in Ubuntu system. Considered the most privileged account on a Unix system, root can perform any tasks needed for system administration.
Navigating a specific folder, killing any process or deleting a directory, root is so powerful that it has to be managed properly.
In order to change the root password, you have to use the "passwd" and specify the root account:
$ sudo passwd root
After changing your password, the account will be automatically unlocked.
In order to switch to the root account, you can use the well-known "su" command without any arguments (the default account is root):
$ su -
To restart your SSH server for the modifications to be taken into account:
$ sudo systemctl restart sshd