adduser.conf(5)                                                 File Formats Manual                                                adduser.conf(5)

NAME

       /etc/adduser.conf - configuration file for adduser(8) and addgroup(8).

DESCRIPTION

       The  file  /etc/adduser.conf  contains  defaults for the programs adduser(8) , addgroup(8) , deluser(8) and delgroup(8).  Each line holds a
       single value pair in the form option = value.  Double or single quotes are allowed around the value, as is  whitespace  around  the  equals
       sign.  Comment lines must have a hash sign (#) in the first column.

       The valid configuration options are:

       DSHELL The login shell to be used for all new users.  Defaults to /bin/bash.

       DHOME  The directory in which new home directories should be created.  Defaults to /home.

       GROUPHOMES
              If this is set to yes, the home directories will be created as /home/[groupname]/user.  Defaults to no.

       LETTERHOMES
              If  this  is  set  to  yes, then the home directories created will have an extra directory inserted which is the first letter of the
              loginname.  For example: /home/u/user.  Defaults to no.

       SKEL   The directory from which skeletal user configuration files should be copied.  Defaults to /etc/skel.

       FIRST_SYSTEM_UID and LAST_SYSTEM_UID
              specify an inclusive range of UIDs from which system UIDs can be dynamically allocated. Default to 100 - 999.  Please note that sys-
              tem software, such as the users allocated by the base-passwd package, may assume that UIDs less than 100 are unallocated.

       FIRST_UID and LAST_UID
              specify an inclusive range of UIDs from which normal user's UIDs can be dynamically allocated. Default to 1000 - 59999.

       FIRST_SYSTEM_GID and LAST_SYSTEM_GID
              specify an inclusive range of GIDs from which system GIDs can be dynamically allocated.  Default to 100 - 999.

       FIRST_GID and LAST_GID
              specify an inclusive range of GIDs from which normal group's GIDs can be dynamically allocated. Default to 1000 - 59999.

       USERGROUPS
              If  this  is set to yes, then each created user will be given their own group to use.  If this is no, then each created user will be
              placed in the group whose GID is USERS_GID (see below).  The default is yes.

       USERS_GID
              If USERGROUPS is no, then USERS_GID is the GID given to all newly-created users.  The default value is 100.

       DIR_MODE
              If set to a valid value (e.g. 0755 or 755), directories created will have the specified permissions as umask. Otherwise 0755 is used
              as default.

       SETGID_HOME
              If  this  is  set to yes, then home directories for users with their own group ( USERGROUPS=yes ) will have the setgid bit set. This
              was the default setting for adduser versions << 3.13. Unfortunately it has some bad side effects,  so  we  no  longer  do  this  per
              default. If you want it nevertheless you can still activate it here.

       QUOTAUSER
              If set to a nonempty value, new users will have quotas copied from that user.  The default is empty.

       NAME_REGEX
              User  and group names are checked against this regular expression. If the name doesn't match this regexp, user and group creation in
              adduser is refused unless --force-badname is set. With --force-badname set, only weak checks are performed. The default is the  most
              conservative ^[a-z][-a-z0-9]*$.  When --system is specified, NAME_REGEX_SYSTEM is used instead.

       NAME_REGEX_SYSTEM
              Names  of system users are checked against this regular expression.  If --system is supplied and the name doesn't match this regexp,
              user creation in adduser is refused unless --force-badname is set. With --force-badname set, only weak  checks  are  performed.  The
              default is as for the default NAME_REGEX but also allowing uppercase letters.

       SKEL_IGNORE_REGEX
              Files  in  /etc/skel/  are checked against this regex, and not copied to the newly created home directory if they match.  This is by
              default set to the regular expression matching files left over from unmerged config files (dpkg-(old|new|dist)).

       ADD_EXTRA_GROUPS
              Setting this to something other than 0 (the default) will cause adduser to add newly created non-system users to the list of  groups
              defined by EXTRA_GROUPS (below).

       EXTRA_GROUPS
              This  is  the list of groups that new non-system users will be added to.  By default, this list is 'dialout cdrom floppy audio video
              plugdev users games'.

NOTES

       VALID NAMES
              adduser and addgroup enforce conformity to IEEE Std 1003.1-2001, which allows only the following characters to appear in  group  and
              user  names:  letters,  digits,  underscores,  periods,  at signs (@) and dashes. The name may no start with a dash. The "$" sign is
              allowed at the end of usernames (to conform to samba).

              An additional check can be adjusted via the configuration parameter NAME_REGEX to enforce a local policy.

FILES

       /etc/adduser.conf

SEE ALSO

       addgroup(8), adduser(8), delgroup(8), deluser(8), deluser.conf(5)

Debian GNU/Linux                                               Version 3.116ubuntu1                                                adduser.conf(5)