Provided by: adduser_3.110ubuntu5_all bug

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]
       [--add_extra_groups] [--encrypt-home] 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

       addgroup [options] [--gid ID] group

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

       adduser [options] user group

   COMMON OPTIONS
       [--quiet] [--debug] [--force-badname] [--help|-h]  [--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, by default  choosing
       Debian  policy 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.  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’ primary
       groups  can  also be overridden from the command line with the --gid or
       --ingroup options to set the group by id or name, respectively.   Also,
       users can be added to one or more groups defined in adduser.conf either
       by setting  ADD_EXTRA_GROUPS  to  1  in  adduser.conf,  or  by  passing
       --add_extra_groups on the commandline.

       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  is
       still possible (for example with SSH RSA keys).  To set up an encrypted
       home directory for the new user, add the  --encrypt-home  option.   For
       more  information, refer to the -b option of ecryptfs-setup-private(1).

       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
       The environment variable VERBOSE is  set  according  to  the  following
       rule:

       0 if --quiet is specified

       1 if neither --quiet nor --debug is specified

       2 if --debug is specified

              (The same applies to the variable DEBUG, but DEBUG is deprecated
              and will be removed in a later version of adduser.)

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

       adduser  will  choose  the first available UID from the range specified
       for system  users  in  the  configuration  file  (FIRST_SYSTEM_UID  and
       LAST_SYSTEM_UID).  If  you want to have a specific UID, you can specify
       it using 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 logins disabled.  Skeletal configuration
       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 system  GIDS  in  the
       configuration  file  (FIRST_GID,  LAST_GID). To override that mechanism
       you can give the GID using 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 system GIDS in the
       configuration file  (FIRST_SYSTEM_GID,  LAST_SYSTEM_GID).  To  override
       that mechanism you can give the GID using 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  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.

EXIT VALUES

       0      The  user  exists as specified. This can have 2 causes: The user
              was created by adduser or the user was already  present  on  the
              system  before  adduser  was  invoked. Invoking adduser a second
              time with the same parameters as before also returns 0.

       1      Creating the user or group failed because it was already present
              with other UID/GID than specified. The username or groupname was
              rejected because of  a  mismatch  with  the  configured  regular
              expressions,  see adduser.conf(5). Adduser has been aborted by a
              signal.
              Or for many other yet undocumented reasons which are printed  to
              console  then.  You  may then consider to remove --quiet to make
              adduser more verbose.

FILES

       /etc/adduser.conf
              Default configuration file for adduser and addgroup

SEE ALSO

       adduser.conf(5),  deluser(8),  useradd(8),   groupadd(8),   usermod(8),
       Debian Policy 9.2.2.

COPYRIGHT

       Copyright  (C)  1997,  1998,  1999  Guy  Maor.  Modifications by Roland
       Bauerschmidt and Marc  Haber.  Additional  patches  by  Joerg  Hoh  and
       Stephen Gran.
       Copyright  (C)  1995  Ted  Hajek,  with  a great deal borrowed from the
       original 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.