The point is, that a Linux system can include hundreds of users (if necessary). Although you wouldn't want this, a Linux server can handle 4,294,967,294 concurrent and distinct users.

Here's a quick guide to adding users and groups, and then how to add users to groups, all from the command line on the Linux platform.

Need to lock down that Linux server so certain remote users can only access a specific directory and only for file upload and download purposes? Jack Wallen shows you how.