groupadd(1M) — ADMINISTRATOR COMMANDS
NAME
groupadd − add (create) a new group definition on the system
SYNOPSIS
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.
The following options are available:
-g gid The group ID for the new group. This group ID must be a non-negative decimal integer below MAXUID as defined in the <param.h> header file. By default, a unique group ID is allocated in the valid range. Group IDs from 0-99 are reserved.
-o This option allows the gid to be duplicated (non-unique).
group A string of printable characters that specifies the name of the new group. It may not include a colon (:) or newline (\\n).
FILES
/etc/group
SEE ALSO
groupdel(1M), groupmod(1M), logins(1M), useradd(1M), userdel(1M), usermod(1M), users(1)
DIAGNOSTICS
The groupadd command exits with one of the following values:
0 Success.
2 Invalid command syntax; a usage message for the groupadd command is displayed.
3 An invalid argument was provided to an option.
4 gid is not unique (when the -o option is not used).
9 group is not unique.
10 Cannot update the /etc/group file.
— Essential Utilities