How to Create Users in Linux (useradd Command)
Linux is multi-user system which means that more than one person can interact with the same system at the same time. This tutorial explains the useradd command and its options.
How to Add User to Group in Linux
Linux groups are organization units which are used to organize and administer user accounts in Linux. The main purpose of groups is to define a set of privileges such as reading, writing, or executing permission for a given resource that can be shared among the users within the group.