Adding a user to a group

Shell Programming and Scripting
1

Hello guys!!

If a user is already created on a server, how do you add them to another group?

The useradd command? If so then would that duplicate the user account on the server?

Thanks
Bigben

2

It depends on your OS.

Perhaps usermod?

3

My OS is HPUX...

Thanks in advance for the help!

4

It's still usermod (probably! I haven't used HPUX in a long time, but there is a man page for usermod that indicates we're onto something here).

Check the man page.

On Red Hat, I just ran:

# usermod -G gdm root

# id root
uid=0(root) gid=0(root) groups=0(root),42(gdm)  ...

The usage might not be the same on HP, which is why you should read the manual page.

5

On debian :

adduser user group

add user to group if user already exists