CHAPTER

6

Managing Users and Groups

Linux was designed from the ground up to be a multiuser operating system, but a multiuser operating system would not be much good without users! And this brings us nicely to the subject of this chapter—managing users and groups in GNU/Linux.

On shared computer systems, a system administrator is usually responsible for creating, managing, and deleting user accounts. The ability of a user to access resources on a system is determined by the permissions associated with the user. Associated with each user is some “baggage,” which can include files, processes, resources, and other information. When dealing with a multiuser system, a system administrator needs to understand what constitutes a user (and the ...

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