[Pkg-shadow-devel] Bug#325558: login: newgrp quite broken?

[Christian Perrier]

> - I wanted to complain that adding a supplementary group via the tools
> was a pain, and it was with usermod (I had to find out the current
> list of groups, then list them all again plus the new one on the
> usermod command line).  But now I see "adduser <user> <group>" in
> man adduser.  Well, good to know; I hope I can remember that, adduser
> program name doesn't really help <frown>

That's adduser package programs rationale: be high level tools, which
use is recommended in Debian

useradd and other user* and group* tools are part of the passwd
package and are intended to be lower level tools.

In short: if you want easy user management tools, use adduser.