Manual pages › System administration commands (1M)
groupmod(1M)
modify a group definition on the system
From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.
NAME
groupmod - modify a group definition on the system
SYNOPSIS
groupmod [-g gid [-o]] [-n name] group
DESCRIPTION
The groupmod command modifies the definition of the specified group by modifying the appropriate entry in 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 <param.h>. The group ID defaults to the next available (unique) number above 99. (Group IDs from 0-99 are reserved.)
-o This option allows the gid to be duplicated (non-unique).
-n name
A string of printable characters that specifies a new name for the group. It may not include a colon (:) or newline (\\n).
group
The current name of the group to be modified.
FILES
/etc/group
SEE ALSO
groupadd(1M), groupdel(1M), logins(1M), useradd(1M), userdel(1M), usermod(1M), users(1).
DIAGNOSTICS
The groupmod command exits with one of the following values:
0 Success.
2 Invalid command syntax. A usage message for the groupmod command is displayed.
3 An invalid argument was provided to an option.
4 gid is not unique (when the -o option is not used).
6 group does not exist.
9 name already exists as a group name.
10 Cannot update the /etc/group file.