On Mon, 2009-07-13 at 15:47 -0400, Rob Kampen wrote:> Hi All,> I have an nfs mount from my CentOS 5.3 client to a CentOS5.3 server. > This has been functioning correctly for some years.> Beginning last week I had problems saving OpenOffice documents onto the > nfs mounted volume.> OpenOffice just times out with a file io error.> So I tried just a simple shell - cd to the mounted volume did a vi > create of text file - no problems.> tried a chmod +w on an owned file - returned okay but no change to the > permissions when checked with ls -l> tried sudo chmod +w on the same file and get> [rkampen@robsws p_494]$ sudo chmod +w 5887_cover.pdf> Password:> chmod: changing permissions of `5887_cover.pdf': Operation not permitted> yet using gnome file browser I can change permissions on these nfs > mounted files just fine - go figure.> > This did work in the past - so what has changed?> how do I check what version of nfs is actually working?> > [rkampen@robsws p_494]$ mount> 192.168.230.230:/NDG on /NDG type nfs (rw,noatime,intr,addr=192.168.230.230)> > Any thoughts?----man pages are your friends
man exports
Very often, it is not desirable that the root user on a client machineis also treated as root when accessing files on the NFS server. Tothis end, uid 0 is normally mapped to a different id: the so-calledanonymous or nobody uid. This mode of operation (called ‘root squash-ing’) is the default, and can be turned off with no_root_squash.
Craig
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