GROUPADD(8) Maintenance Commands and Procedures GROUPADD(8)

NAME

groupadd - add (create) a new group definition on the system

SYNOPSIS

/usr/sbin/groupadd [-g gid [-o]] group

DESCRIPTION

The groupadd command creates a new group definition on the system by
adding the appropriate entry to the /etc/group file.

OPTIONS

The following options are supported:

-g gid
Assigns the group id gid for the new group. This group id must
be a non-negative decimal integer below MAXUID as defined in
<sys/param.h>. The group ID defaults to the next available
(unique) number above the highest number currently assigned.
For example, if groups 100, 105, and 200 are assigned as
groups, the next default group number will be 201. (Group IDs
from 0-99 are reserved for future applications.)


-o
Allows the gid to be duplicated (non-unique).

OPERANDS

The following operands are supported:

group
A string consisting of characters from the set of lower case
alphabetic characters and numeric characters. A warning message
will be written if the string exceeds MAXGLEN, which is usually
set at eight characters. The group field must contain at least
one character; it accepts lower case or numeric characters or a
combination of both, and must not contain a colon (:) or
NEWLINE.

EXIT STATUS

The following exit values are returned:

0
Successful completion.


2
Invalid command syntax. A usage message for the groupadd command is
displayed.


3
An invalid argument was provided to an option.


4
The gid is not unique (when -o option is not used).


9
The group is not unique.


10
The /etc/group file cannot be updated.

FILES

o /etc/group

o /usr/include/userdefs.h

SEE ALSO

group(5), attributes(7), groupdel(8), groupmod(8), grpck(8), logins(8),
pwck(8), useradd(8), userdel(8), usermod(8)

NOTES

groupadd only adds a group definition to the local system. If a network
name service is being used to supplement the local /etc/group file with
additional entries, groupadd cannot change information supplied by the
network name service. However, groupadd will verify the uniqueness of
group name and group ID against the external name service.


If the number of characters in a group entry exceeds 2047, group
maintenance commands, such as groupdel(8) and groupmod(8), fail.

January 7, 2018 GROUPADD(8)