Managing Users and Groups
IN THIS CHAPTER
Understanding the password file
Managing your groups
Working in the user environment
Changing user and group ownerships of files and directories
Managing a user account with a GUI user manager and commands
Linux is a multiuser system, so it has many user accounts. Even if you’ve set up a test machine and you’re the only user using that system, you’ll have a host of system user accounts. Most of these accounts aren’t for people to use; they’re for running specific programs, because many servers require a unique username and group name. The FTP server, for example, runs under the username
User accounts can belong to one or more groups. Typically, each username has a corresponding private group name. By default, each user belongs to that corresponding private group, but you can define other groups for the purpose of providing access to specific files and directories based on group membership.
User and group ownerships of files ...