How many root user can there be in Linux? There can only be one root user. You can use sudo to give administrative privileges to other users.
Why root is a super user? The root account is also known as the superuser account because it’s used to make system changes and can override user file protection in emergency situations. The superuser account should be used only to perform administrative tasks to prevent indiscriminate changes to the system.
What is the purpose of root user in Linux? The root account has virtually unlimited access to all programs, files, and resources on a system. The root account is the special user in the /etc/passwd file with the user ID (UID) of 0 and is commonly given the user name, root.
Does root user have password? By default, in Ubuntu, the root account has no password set. The recommended approach is to use the sudo command to run commands with root-level privileges. To be able to log in as root directly, you’ll need to set the root password.