Use "sudo usermod -a -G example_group example_user" to add a user to a group. To add a user to multiple groups at once, separate groups by commas, like "sudo usermod -a -G group1,group2,group3 example ...

How to Create Users and Groups in Linux from the Command Line Your email has been sent Here's a quick guide to adding users and groups, and then how to add users to groups, all from the command line ...