08-24-2005
Simply saying you ruled something out is not very informative. If I had a penny for every time a poster incorrectly ruled something out I would be a rich man (well, I could afford to go to a movie and buy some popcorn anyway). What technique did you use to verify that group did not change? Try changing the file to 666, can they access it then? Are the other users prevented from accessing other files 660 with that particular group? Do you have the "groups" command? If so, run it as those other users. What is the timestamp on /etc/group? Were these other users recently added to any other groups? How many groups are you trying to add them to? Is that greater than the maximum number of groups per user for your OS?
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LEARN ABOUT REDHAT
create_group
CREATE
GROUP(7) SQL Commands CREATE GROUP(7)
NAME
CREATE GROUP - define a new user group
SYNOPSIS
CREATE GROUP name [ [ WITH ] option [ ... ] ]
where option can be:
SYSID gid
| USER username [, ...]
INPUTS
name The name of the group.
gid The SYSID clause can be used to choose the PostgreSQL group id of the new group. It is not necessary to do so, however.
If this is not specified, the highest assigned group id plus one, starting at 1, will be used as default.
username
A list of users to include in the group. The users must already exist.
OUTPUTS
CREATE GROUP
Message returned if the command completes successfully.
DESCRIPTION
CREATE GROUP will create a new group in the database installation. Refer to the Administrator's Guide for information about using groups
for authentication. You must be a database superuser to use this command.
Use ALTER GROUP [alter_group(7)] to change a group's membership, and DROP GROUP [drop_group(7)] to remove a group.
USAGE
Create an empty group:
CREATE GROUP staff;
Create a group with members:
CREATE GROUP marketing WITH USER jonathan, david;
COMPATIBILITY
SQL92
There is no CREATE GROUP statement in SQL92. Roles are similar in concept to groups.
SQL - Language Statements 2002-11-22 CREATE GROUP(7)