Add User to Linux Group

Prerequisite

Before starting to add user into a group, you must make sure that both group and users are available.

Add User To Group

To add user into group, there are a number of ways: choose 1 of the following subsections.

Manual Add

You can manually edit the /etc/group file by searching the group name and add the user from the list. Example, to add "user2" into "mygroup":

mygroup:x:1274:user1,user3

to

mygroup:x:1274:user1,user2,user3

Using usermod

Yo can also use usermod command to add all secondary groups at once using append argument:

$ usermod -a -G <all wanted groups> <user>

Following the example above, it is:

$ usermod -a -G mygroup,groupT,groupV user2

That's all for adding user into group.