The 6 Linux commands you need to know for user management
Linux is a multi-user operating system. What does that mean? Like all good operating systems, you can have multiple user accounts on one machine. You can also have more than one user logged in at once.
You could have one user logged in directly to the machine, one user logged in via the desktop remotely, another user logged in via Secure Shell. The only limitations are that you can only have one user logged into the desktop directly and the number of users logged in remotely (especially when they're viewing their desktop with an app for remote desktop viewing) will be heavily influenced by system resources.