tcallawa(a)redhat.com ("Tom 'spot' Callaway") writes:
Someone recently pointed out to me the existence of useradd -r and
groupadd -r (they're Red Hat added functionality). When used, these
commands create the first available UID and GID below UID_MAX and
GID_MAX, as defined in /etc/login.defs.
This seems to be doing roughly the same thing as fedora-usermgt.
fedora-usermgt does more. It can assign the same uid/gid for a user in
the entire system. With plain 'useradd -r', users can/will have different
ids on different machines which is very bad with NFS mounts or in chroot