CHAPTER 4
Managing Linux Users and Groups
In this chapter, you will learn about
• Linux users and groups
• Creating and managing Linux user accounts
Linux is a multiuser operating system, so you need a method of restricting users’ access to only those resources they should have permission to access. This chapter introduces Linux users and groups.
Understanding Linux Users and Groups
Linux uses a method called Discretionary Access Control (DAC) to permit or restrict access to an object (resource) based on the user and group identities associated with the user accessing the resource and the permissions granted to that user ID or group ID by the resource.
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