On Sat, Mar 17, 2001 at 05:00:32PM +0000, Richard Earnshaw wrote:
> And I guess someone then decided that newgrp had no use, so deleted it.  However, it appears that they forgot that newgrp could be used with a password to gain access to a group to which one was not normally a member -- useful at times when you need occasional access to more groups than BSD can support for a single user.

For what it's worth Solaris (2.6, at least) still has newgrp and
still supports using it this way, so far as I can tell.

(Yes, they do allow a user to be in multiple groups at a time,
though id doesn't like showing it.)

       ~ g r @ eclipsed.net