How to create Group Aliases

[Robbo]

On Sun, 2005-07-17 at 12:19 -0400, Matthew S-H wrote:
> Is there any way to create a group that is an alias to another group?
> For example:
> lets say I created the group "wheel2" as an alias to "wheel".
> and lets also say that the file /foo/bar exists and that i change its
> group to "wheel2"
> 
> 
> so, when I run "ls -l /foo/bar", I want to see the following:
> -rwxrw-r--   1 some_user  wheel2  140 Jan 1  3000 foo
> 
> 
> on the other hand, if a progam (other than ls and find) is accessing
> this file, I want it to think it has the group "wheel".  In other
> words, I want to be able to tag files and directories using group
> names.

I haven't tested this so not sure it will work, but if you
edit /etc/group and give the second 'alias' group the same gid number it
will think it's the same group.

If your after multiple groups for the same directory, install ACL.