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Logging In

One aspect of maintaining a multiuser system is controlling who can use the computer, which files they have access to, and where their work is stored. These objectives are met by requiring people to sign in before using the machine. This process of identifying yourself to the system, which involves presenting a username and password, is known as a login.

If you're logged in on a Mac that's used by other people with their own accounts, you must log off when finished. This allows the computer to return to a state that enables others to log in. If someone forgets to log off, that person's account and files could be accessed by anyone because the system does not know that the owning user is no longer at the controls.


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