![]() So the "sudo" command (short for "substitute user do") was invented. That's a bit of a hassle, and also doesn't let you give users partial administrative powers. Prior to the invention of the "sudo" command, if you wanted to perform administrative tasks, you had to login as root, either by getting a login prompt² somehow, or with the su command ("su" being short for substitute user.)³ Root can access any file, run any program, execute any system call, and modify any setting. ![]() Root user has user id 0 and nominally has unlimited privileges. ![]() The origins of the name are a little archaic, but that doesn't matter. "root" (aka "superuser") is the name of the system administrator account. "sudo" is a command which allows ordinary users to perform administrative tasks. Executive summary: "root" is the actual name of the administrator account.
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