Provided by: adduser_3.80ubuntu2_all
/etc/adduser.conf - configuration file for adduser(8) and addgroup(8).
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
DHOME The directory in which new home directories should be created.
Defaults to /home.
If this is set to yes, the home directories will be created as
/home/[groupname]/user. Defaults to no.
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.
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.
If USERGROUPS is no, then USERS_GID is the GID given to all
newly-created users. The default value is 100.
If set to a valid value (e.g. 0755 or 755), directories created
will have the specified permissions. Otherwise 0755 is used as
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.
If set to a nonempty value, new users will have quotas copied
from that user. The default is empty.
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-
adduser(8), addgroup(8), deluser(8), delgroup(8)