[CentOS] can non-owner change file group setup?

[Filipe Brandenburger]

On Wed, May 13, 2009 at 11:18, John R Pierce <pierce at hogranch.com> wrote:
> Filipe Brandenburger wrote:
>>> [pierce at xxxx test]$ grep pierce /etc/group
>>> postgres:x:26:pierce
>>> pierce:x:503:
>>
>> It would work if user "pierce" belonged to group "postgres".
>
> Um, I do, I showed that up there.
>
> I was both owner of file AND member of both from and to groups, AND had
> write access to the directory.  still doesn't allow it.   CentOS 5.3, btw.

Did you just add yourself to that group? The processes you run will
not know you are a member of that group until you logout and login
again (open new SSH session, etc.).

When you issue the "id" command (with no parameters), does it include
the "postgres" group?

HTH,
Filipe