Xref: utzoo comp.unix.questions:11419 comp.unix.wizards:14439
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ulowell!hawk.ulowell.edu!arosen
From: arosen@hawk.ulowell.edu (MFHorn)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: Nfs -- root privs
Message-ID: <11494@swan.ulowell.edu>
Date: 1 Feb 89 01:19:19 GMT
References: <695@blake.acs.washington.edu>
Sender: news@swan.ulowell.edu
Reply-To: arosen@hawk.ulowell.edu
Distribution: usa
Lines: 21

> What I want to do is to be able to sit
> as root on caesar, and modify files on the other machines.  This used to
> work uder Ultrix 2.0, there was a procedure to change the value of the
> kernel variable nobody to 0 rather than -2.  It don't seem to work under
> 2.3

Check /etc/exports on the server.  Chances are you're missing '-r=0'.
The -r option sets the uid mapping for that filesystem.  The default
is -2.

One nice feature about DEC's NFS is root-uid mapping is on a per-filesystem
basis rather than having just one mapping for the whole system.  It would
be even better if you could export a filesystem in more than way.  For
example, export /usr to host1 read-only and map root to -2, but export
/usr to host2 read-write and map root to 0 [Sun: hint, hint].

--
Andy Rosen           | arosen@hawk.ulowell.edu | "I got this guitar and I
ULowell, Box #3031   | ulowell!arosen          |  learned how to make it
Lowell, Ma 01854     |                         |  talk" -Thunder Road
		RD in '88 - The way it should've been