groupadd - add (create) a new group definition on the system
/usr/sbin/groupadd [-g gid [-o]] group
The groupadd command creates a new group definition on the system by
adding the appropriate entry to the /etc/group file.
The following options are supported:
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.)
Allows the gid to be duplicated
The following operands are supported:
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.
The following exit values are returned:
Invalid command syntax. A usage message for the
groupadd command is displayed.
An invalid argument was provided to an option.
The gid is not unique (when -o option is
The group is not unique.
The /etc/group file cannot be updated.
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