GROUPADD(1M)GROUPADD(1M)NAMEgroupadd - 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 /usr/include/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 by SunOS for
Allows the gid to be duplicated (non-unique).
The following operands are supported:
A string consisting of characters from the set of lower case
alphabetic characters and numeric characters. A warning mes‐
sage 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 char‐
acters 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
An invalid argument was provided to an option.
The gid is not unique (when -o option is not used).
The group is not unique.
The /etc/group file cannot be updated.
SEE ALSOusers(1B), groupdel(1M), groupmod(1M), grpck(1M), logins(1M), pwck(1M),
useradd(1M), userdel(1M), usermod(1M), group(4), attributes(5)NOTESgroupadd only adds a group definition to the local system. If a network
name service such as NIS or NIS+ is being used to supplement the local
/etc/group file with additional entries, groupadd cannot change infor‐
mation supplied by the network name service. However, groupadd will
verify the uniqueness of group name and group ID against the external
If the number of characters in a group entry exceeds 2047, group main‐
tenance commands, such as groupdel(1M) and groupmod(1M), fail.
Aug 27, 2008 GROUPADD(1M)