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ADDUSER(8)                  System Manager's Manual                 ADDUSER(8)



NAME
       adduser, addgroup - add a user or group to the system

SYNOPSIS
       adduser  [options]  [--home  DIR]  [--shell  SHELL]  [--no-create-home]
       [--uid ID] [--firstuid ID] [--lastuid ID] [--ingroup GROUP | --gid  ID]
       [--disabled-password] [--disabled-login] [--gecos GECOS] user

       adduser  --system  [options] [--home DIR] [--shell SHELL] [--no-create-
       home] [--uid ID] [--group | --ingroup GROUP |  --gid  ID]  [--disabled-
       password] [--disabled-login] [--gecos GECOS] user

       adduser --group [options] [--gid ID] group
       addgroup [options] [--gid ID] group

       adduser --group --system [options] [--gid ID] group
       addgroup --system [options] [--gid ID] group

       adduser [options] user group

   COMMON OPTIONS
       [--quiet] [--force-badname] [--help] [--version] [--conf FILE]

DESCRIPTION
       adduser  and  addgroup  add users and groups to the system according to
       command    line    options    and    configuration    information    in
       /etc/adduser.conf.   They  are  friendlier  front ends to the low level
       tools like useradd, groupadd and usermod programs, choosing Debian pol-
       icy  conformant  UID  and  GID  values,  creating a home directory with
       skeletal configuration, running a custom script,  and  other  features.
       adduser and addgroup can be run in one of five modes:

   Add a normal user
       If  called  with  one  non-option  argument and without the --system or
       --group options, adduser will add a normal user.

       adduser will choose the first available UID from  the  range  specified
       for  normal users in the configuration file.  The UID can be overridden
       with the --uid option.

       The range specified in the configuration file may  be  overridden  with
       the --firstuid and --lastuid options.

       By  default,  each  user  in  Debian GNU/Linux is given a corresponding
       group with the same name  and  id.   Usergroups  allow  group  writable
       directories to be easily maintained by placing the appropriate users in
       the new group, setting the  set-group-ID  bit  in  the  directory,  and
       ensuring  that  all users use a umask of 002.  If this option is turned
       off by setting USERGROUPS to no, all users' GIDs are set to  USERS_GID.
       Users'  groups  can  also  be overridden from the command line with the
       --gid or --ingroup options to set the group  by  id  or  name,  respec-
       tively.

       adduser  will create a home directory subject to DHOME, GROUPHOMES, and
       LETTERHOMES.  The home directory can be  overridden  from  the  command
       line with the --home option, and the shell with the --shell option. The
       home directory's set-group-ID bit is set if USERGROUPS is yes  so  that
       any  files  created  in the user's home directory will have the correct
       group.

       adduser will copy files from SKEL into the home  directory  and  prompt
       for  finger  (gecos) information and a password.  The gecos may also be
       set with the --gecos option.  With  the  --disabled-login  option,  the
       account  will  be created but will be disabled until a password is set.
       The --disabled-password option will not set a password, but  login  are
       still possible for example through SSH RSA keys.

       If  the  file /usr/local/sbin/adduser.local exists, it will be executed
       after the user account has been set up in order to do any local  setup.
       The arguments passed to adduser.local are:
       username  uid  gid  home-directory, and the environment variables DEBUG
       and VERBOSE will be set according to the settings in  the  master  pro-
       gram.

   Add a system user
       If called with one non-option argument and the --system option, adduser
       will add a system user. If an user with an uid in the system range  (or
       if  the  uid  is specified, with that) does already exist, adduser will
       exit with a warning.

       adduser will choose the first available UID from  the  range  specified
       for  system users in the configuration file.  The UID can be overridden
       with the --uid option.

       By default, system users are placed in the nogroup group.  To place the
       new  system  user  in  an  already  existing  group,  use  the --gid or
       --ingroup options.  To place the new system user in a  new  group  with
       the same ID, use the --group option.

       A home directory is created by the same rules as for normal users.  The
       new system user will have the shell /bin/false (unless overridden  with
       the --shell option), and have a disabled password.  Skeletal configura-
       tion files are not copied.

   Add a user group
       If adduser is called with the --group option and without  the  --system
       option, or addgroup is called respectively, a user group will be added.

       A GID will be chosen from the range specified for user UIDS in the con-
       figuration file.  The GID can be overridden with the --gid option.

       The group is created with no users.

   Add a system group
       If addgroup is called with the --system option, a system group will  be
       added.

       A GID will be chosen from the range specified for user UIDS in the con-
       figuration file.  The GID can be overridden with the --gid option.

       The group is created with no users.

   Add an existing user to an existing group
       If called with two non-option arguments, adduser will add  an  existing
       user to an existing group.

OPTIONS
       --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
              through SSH RSA keys, but not using password authentification.

       --force-badname
              By  default,  user and group names are checked against a config-
              urable  regular  expression.  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 adduser.conf file.

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

       --quiet
              Suppress progress messages.

       --system
              Create a system user.

       --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.

       --lastuid ID
              Override the last uid in the range that the uid is chosen from.

       --version
              Display version and copyright information.

FILES
       /etc/adduser.conf

SEE ALSO
       adduser.conf(5), deluser(8), useradd(8), groupadd(8), usermod(8)


COPYRIGHT
       Copyright (C) 1997, 1998, 1999 Guy Maor. Modifications by Roland Bauer-
       schmidt and Marc Haber.
       Copyright (C) 1995 Ted Hajek, with a great deal borrowed from the orig-
       inal Debian adduser
       Copyright (C) 1994 Ian Murdock.  adduser is free software; see the  GNU
       General  Public  Licence  version  2  or  later for copying conditions.
       There is no warranty.



Debian GNU/Linux                 Version 3.63                       ADDUSER(8)