- From the desktop, press Alt+F2 to launch the Run Application window.
- Type: gnome-terminal then press Enter. This will launch a user terminal (similar to Windows command prompt).
- At the terminal prompt, type:su then press Enter. When prompted, type the root (administrator) password then press Enter. You now have a root terminal session.
- At the root terminal, type:usermod -l <new username> <old username> then press Enter. The username is now changed.