Root User#
On Linux the "superuser" is, generally speaking, root.
The superuser can do anything on the system. That means they can install software, add users, mount and format physical disk drives, and absolutely destroy everything.
The superuser is a powerful user and in reality you very rarely use the superuser directly. Instead, you'll configure a standard user and use a utility called sudo, which means switch user, do: you switch another user and then do something (run a command) and then come back to your own user account.
When you're operating a remote Linux system has a non-root user, your command prompt has this character just before your commands: $. If you're the root user, then your command prompt will be #.
Let's talk about su and sudo.