Superuser mode (SU)

• What is Superuser Mode?: In one word, it gives complete access to your system. A normal user has only limited privileges, but a superuser has no limits.
• How to enter Superuser mode?:
1. Open a Terminal window.
2. Type "sudo su" - This will prompt for the current user password and will give you administrative privileges for all commands entered here after on the terminal.
• Examples: (Enter the command in SU mode on the terminal window)
• Launch the browser in superuser mode to modify root files:
• Ubuntu: nautilus --browser <path>
  Eg: nautilus --browser /etc
• Xubuntu: thunar <path>
  Eg: thunar /etc
• Open a file in superuser mode:
• Ubuntu: gedit <filepath>
  Eg: gedit /etc/fstab
• Xubuntu: mousepad <filepath>
  Eg: mousepad /etc/fstab

Note:

• SU mode is not recommended if you have no idea what you are doing :-)
• You can use "sudo su" and enter supervisor mode instead of prefixing "sudo" to each command