[plug] Set GID on a partition

[J Michael Gilks]

I am finally getting a file server running but am running into small problems 
getting everyone permissions on some stuff.
If I create a group called users on each machine accessing the server and on 
the server, then make all users who need access to, say /common, a part of 
group users, can I then set GID on the partition or will it need to be every 
directory in partition /common.
Also I have lost the console command to add a user to a group.
Can someone help me out please?

Thanks in advance.

Love
Mike.