command to add user to supplementary group

[Neal D. Becker]

On Friday 25 July 2003 02:26 pm, Matthew Miller wrote:
> On Fri, Jul 25, 2003 at 02:33:30PM -0400, James Olin Oden wrote:
> > > One thing I haven't found, is a simple util to add users to
> > > supplementary groups.
> >
> > usermod will do this.  The key is that the -g is for their primary
> > group (i.e. the one that shows up in the /etc/passwd file, and the
> > -G (the big Gee!) edits the supplementary groups for the user.
> > So to add user john to the doe group you would type:
> > 	usermod -G doe john
>
> Yeah, but now you've removed him from any other supplementary groups. You'd
> have to do something sick like:
>
>    usermod -G doe `groups john|cut -d' ' -f 3-` jon
>
> Or instead, "gpasswd -a john doe" does what you want.

Thanks! gpasswd is what I want.  Now, all that's missing is the man pages 
should be updated to point to it.  In particular, 'man group' doesn't mention 
this command.