The "su" command in Linux means "substitute user,". It allows you to change to a different user account.
To switch to the root user, simply type: su
Use the following syntax to switch to a specific user: su username
Execute a single command as another user: su -c "command" username
Switch to the root user without using the “-” option: su root
Use “su” cautiously. It's best practice to limit its usage to minimize security risks.