groupadd - add a new group to the system
groupadd [-g gid [-o] ] group
The groupadd command creates a new group on the system by adding the
appropriate entry to the /etc/group file. The groupadd command
expects the group argument, which is the name of the new group. The
name consists of a string of printable characters that may not include
a colon (:) or newline (\n).
The groupadd command may be used with the following options:
-g gid Specifies the group ID for the new group. gid must be
a non-negative decimal integer less than MAXUID as
defined in the <param.h> header file. By default the
next available unique group ID in the valid range is
allocated. Group IDs in the range 0-99 are reserved.
-o Allow the gid to be non-unique (i.e., a duplicate).
The groupadd command is aware of NIS user entries. Only local groups
may be added with this command. Attempts to add an NIS group will
result in an error. NIS groups must be administered from the NIS
server. If groupadd is used on a system where NIS is installed, it
may fail with the error
group x is not unique
(return value 9) if the group specified is not present in the local
/etc/group file, but is an NIS group (see group(4)). NIS groups are
also checked when verifying uniqueness of the new gid, which may
result in the error
GID # is not unique
(return value 4).
The groupadd command exits with one of the following values:
0 No error.
2 Invalid command syntax.
3 Invalid argument supplied to an option.
4 gid is not unique (when -o is not used).
9 group is not unique.
Hewlett-Packard Company - 1 - HP-UX Release 11i: November 2000
10 Cannot modify the /etc/group file.
11 /etc/passwd file or /etc/ptmp file busy. Another command may
be modifying the /etc/passwd file.
12 Unable to open /etc/ptmp file or /etc/passwd file is non-
Add the group project1 to the /etc/group file.
Add the group project12 to the /etc/group file with the group ID 111
as long as no group currently exists with a group ID of 111.
groupadd -g 111 project12
As many users may try to write the /etc/passwd file simultaneously, a
passwd locking mechanism was deviced. If this locking fails after
subsequent retrying, groupadd terminates.
users(1), groupdel(1M), groupmod(1M), logins(1M), useradd(1M),
userdel(1M), usermod(1M), group(4).
Hewlett-Packard Company - 2 - HP-UX Release 11i: November 2000