# sudo asks for *your* password and must be configured via /etc/sudoers!!!sudo -s             # Shell for superuser sudo -i             # Login shell for superusersudo -u jimmy -s    # Shell for user "jimmy"sudo -u jimmy -i    # Login shell for user "jimmy"# su asks for the root password and usually requires no configurationsu                  # Shell for superusersu -                # Login shell for superusersu jimmy            # Shell for "jimmy"su - jimmy          # Login shell for "jimmy"