Provided by:
adduser_3.112+nmu1ubuntu5_all 
NAME
/etc/adduser.conf -- adduser(8) 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 column.
:
DSHELL shell, . /bin/bash.
DHOME , . /home.
GROUPHOMES
yes, /home/[_]/. no.
LETTERHOMES
yes, , . : /home//. no.
SKEL , . /etc/skel.
FIRST_SYSTEM_UID LAST_SYSTEM_UID
() UID . 100 - 999. , UID 100 (, UID
base-passwd) .
FIRST_UID LAST_UID
() UID . 1000 - 29999.
FIRST_SYSTEM_GID LAST_SYSTEM_GID
() GID, GID. 100 - 999.
FIRST_GID LAST_GID
() GID, GID. 1000 - 29999.
USERGROUPS
yes, . no, , GID USERS_GID ( ). yes.
USERS_GID
USERGROUPS no, USERS_GID GID, . 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
yes, ( USERGROUPS=yes ) setgid . adduser << 3.13.
, , . - , .
QUOTAUSER
, , . .
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]*$. When
--system is specified, NAME_REGEX_SYSTEM is used instead.
NAME_REGEX_SYSTEM
Names of system users are checked against this regular
expression. If --system is supplied and the name doesn't match
this regexp, user creation in adduser is refused unless
--force-badname is set. With --force-badname set, only weak
checks are performed. The default is as for the default
NAME_REGEX but also allowing uppercase letters.
SKEL_IGNORE_REGEX
/etc/skel/ , , . , (dpkg-(old|new|dist)).
ADD_EXTRA_GROUPS
0 ( ), adduser , EXTRA_GROUPS ( ).
EXTRA_GROUPS
This is the list of groups that new non-system users will be
added to. By default, this list is 'dialout cdrom floppy audio
video plugdev users games'
adduser addgroup IEEE Std 1003.1-2001, , : , , , ,
(@) . . "$" ( samba).
NAME_REGEX.
/etc/adduser.conf
adduser(8), addgroup(8), deluser(8), delgroup(8), deluser.conf(5)