--conf FILE
       Use FILE instead of /etc/adduser.conf.

--disabled-login
       Do  not  run  passwd  to  set  the  password.  The user won't be able to use her account until the
       password is set.

--disabled-password
       Like --disabled-login, but logins are still possible (for example using  SSH  RSA  keys)  but  not
       using password authentication.

--force-badname
       By  default,  user  and  group  names  are  checked  against  the  configurable regular expression
       NAME_REGEX (or NAME_REGEX_SYSTEM if --system is specified) specified in  the  configuration  file.
       This option forces adduser and addgroup to apply only a weak check for validity of the name.

--gecos GECOS
       Set  the  gecos field for the new entry generated.  adduser will not ask for finger information if
       this option is given.

--gid ID
       When creating a group, this option forces the new groupid to be the given number.  When creating a
       user, this option will put the user in that group.

--group
       When  combined with --system, a group with the same name and ID as the system user is created.  If
       not combined with --system, a group with the given name is created.  This is the default action if
       the program is invoked as addgroup.

--help Display brief instructions.

--home DIR
       Use DIR as the user's home directory, rather than the default specified by the configuration file.
       If the directory does not exist, it is created and skeleton files are copied.

--shell SHELL
       Use SHELL as the user's login shell, rather than the default specified by the configuration file.

--ingroup GROUP
       Add the new user to GROUP instead of a usergroup or the default group defined by USERS_GID in  the
       configuration  file.   This  affects  the  users primary group.  To add additional groups, see the
       add_extra_groups option

--no-create-home
       Do not create the home directory, even if it doesn't exist.

--quiet
       Suppress informational messages, only show warnings and errors.

--debug
       Be verbose, most useful if you want to nail down a problem with adduser.

--system
       Create a system user or group.

--uid ID
       Force the new userid to be the given number.  adduser will fail if the userid is already taken.

--firstuid ID
       Override the first uid in the range that the uid is chosen from (overrides FIRST_UID specified  in
       the configuration file).

--lastuid ID
       Override the last uid in the range that the uid is chosen from ( LAST_UID )

--add_extra_groups
       Add new user to extra groups defined in the configuration file.

--version
       Display version and copyright information.