Managing different types of users and groups is one of the primary roles of system administration. Using different types of user and group account as a role-based access control is configured into the system. Depending upon the privileges of user, we can restrict user access to various system resources.
Understanding users and groups in CentOS 7
Defining a user
Each process running on our system is started by a user, to whom it belongs. Access to different files and directories by running processes is determined by the user associated with that process. Similarly, every file in our system is owned by some user and access to different files and directories on the system is restricted by user privileges. By default, new files...