You need to set the password for the root first by “sudo passwd root”, enter your password once and then root’s new password twice. Then type in “su -” and enter the password you just set. Another way of gaining root access is “sudo su” but this time enter your password instead of the root’s.

How do I use root user?

Logging in as root

If you know root’s password, you can use it to log into the root account from the command line. Enter the password once prompted for the password. If successful, you are switched to the root user and can run commands with full system privileges.

What is root user command in Linux?

The root is the user name or account that by default has access to all commands and files on a Linux or other Unix-like operating system. It is also referred to as the root account, root user, and the superuser.