adduser --version (return code: 0)
adduser version 3.113+nmu3ubuntu4
Adds a user or group to the system.
Copyright (C) 1997, 1998, 1999 Guy Maor <maor@debian.org>
Copyright (C) 1995 Ian Murdock <imurdock@gnu.ai.mit.edu>,
Ted Hajek <tedhajek@boombox.micro.umn.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License, /usr/share/common-licenses/GPL, for more details.
adduser --help (return code: 0)
adduser [--home DIR] [--shell SHELL] [--no-create-home] [--uid ID]
[--firstuid ID] [--lastuid ID] [--gecos GECOS] [--ingroup GROUP | --gid ID]
[--disabled-password] [--disabled-login] [--encrypt-home] USER
Add a normal user
adduser --system [--home DIR] [--shell SHELL] [--no-create-home] [--uid ID]
[--gecos GECOS] [--group | --ingroup GROUP | --gid ID] [--disabled-password]
[--disabled-login] USER
Add a system user
adduser --group [--gid ID] GROUP
addgroup [--gid ID] GROUP
Add a user group
addgroup --system [--gid ID] GROUP
Add a system group
adduser USER GROUP
Add an existing user to an existing group
general options:
--quiet | -q don't give process information to stdout
--force-badname allow usernames which do not match the
NAME_REGEX[_SYSTEM] configuration variable
--extrausers uses extra users as the database
--help | -h usage message
--version | -v version number and copyright
--conf | -c FILE use FILE as configuration file