[Gllug] Reason behind groups

Walid Shaari walid at melinux.com
Thu Oct 17 08:50:53 UTC 2002


On Tue, 2002-10-15 at 15:17, Paul Nasrat wrote:
> On Tue, Oct 15, 2002 at 02:47:57PM +0100, Jonathan Dye wrote:
> > Hi,
> > 
> > I've noticed several distributions that by default set the group of new
> > users to have the same name as the user.
> > i.e.
> > 
> > but I can't see a good reason to have it this way.  On all the systems that
> 
> > Can anyone suggest why it is this way?
> 
> Here's RedHat's spin on things (they call it UPG).
> 
> http://www.redhat.com/docs/manuals/linux/RHL-7.2-Manual/ref-guide/s1-users-groups-private-groups.html
> 
> It's proposes using a primary private group, and then other groups eg
> students are secondary.  This with an appropriate umask and setgid bit
> on shared dirs means users don't have to fiddle with umask and newgrp.

how many groups can a single user join in? (e.g. in Solaris 8 I believe
its like 16, and thats one reason for use of ACL)

is there a similar default limit in Linux?


TIA

Walid



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