Why can't I write this file?

[Matthew Seaman]

On Mon, Mar 08, 2004 at 04:53:12PM -0500, Marty Landman wrote:
> At 04:42 PM 3/8/2004, Dan Nelson wrote:
> 
> >What do you get if you run the "id" command?  Try logging out and back
> >in.  Group memberships are checked at login time, so if you were added
> >to the www group recently, your current shell may not know about it.
> 
> Would rehash fix that or do you have to log back in?

No -- rehash only applies to tcsh(1)'s lookup cache of all of the
executables found on $PATH.
 
> It's kind of strange but true how you could be logged onto the same account 
> on two different ttys or ssh sessions and have different sets of gids or 
> commands available to you. <just thinking out loud>

Yes, quite.  Your login credentials are established when you login to
the system and only then -- that's when the limits of what you're
authorized to do are set, which includes amongst other things which
groups you're a member of.  So you have to log out and back in again
to pick up any changes to /etc/master.passwd or /etc/group.

	Cheers,

	Matthew

-- 
Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey         Marlow
Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
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