Chapter 10Administering Users and Groups
If you want to buy a famous and expensive piece of art, you should make sure it isn't a fake. In other words, you want to make sure it is authentic. The same is true for allowing users access to a computer system. You want to make sure they are authentic users who have been previously given authorization to access the system. This process, called authentication, is defined as determining whether a person or program is who they claim to be. This chapter covers administering the access controls Linux uses to check a user's credentials and permit or deny access to the system.
Besides user authentication, you need to know how to audit ...
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