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 line. 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.

FIRST_UID and LAST_UID
    specify an inclusive range of UIDs from which normal user's UIDs can be dynamically allocated. Default to 1000 - 29999.

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. 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.

USER_REGEX
    User names are checked against this regular expression. If the name doesn't match this regexp, user creation 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]*

FILES
/etc/adduser.conf

SEE ALSO
adduser(8), addgroup(8), deluser(8), delgroup(8)