"sudo (Super User DO) command in Linux (and UNIX and BSD) is generally used as a prefix for some commands that only superusers are allowed to run. If you prefix any command with "sudo", it will run that command with elevated privileges or in other words allow a user with proper permissions to execute a command as another user, such as the superuser. This is the equivalent of the "run as administrator" option in Windows. The option of sudo lets us have multiple administrators. "
Thanks for the explanation, Mr G. I don't think that will apply to me so far as computers are concerned. I may have occasional "Super Duper Outstanding" shaves, but I wouldn't call myself a superuser in general.