grpck - check group database entries
/usr/etc/grpck [ filename ]
This command is available with the System V software installation
option. Refer to for information on how to install optional software.
grpck checks that a file in group(5) does not contain any errors; it
checks the /etc/group file by default.
Too many/few fields
An entry in the group file does not have the proper number of
No group name
The group name field of an entry is empty.
Bad character(s) in group name
The group name in an entry contains characters other than lower-
case letters and digits.
The group ID field in an entry is not numeric or is greater than
Null login name
A login name in the list of login names in an entry is null.
Login name not found in password file
A login name in the list of login names in an entry is not in
the password file.
First char in group name not lower case alpha
The group name in an entry does not begin witha lower-case let-
Group name too long
The group name in an entry has more than 8 characters.
groups(1), group(5), passwd(5)
17 September 1989 GRPCK(8V)