A host which I previously had NFS working just fine on, suddenly stopped allowing other hosts to mount its shares. Automounting from another host would simply fail and a manual mount would result in a permission denied error.

After much googling the solution was to add:

nfsd /proc/fs/nfsd nfsd auto,defaults 0 0

to /etc/fstab and then type:

$mount -a

Doing this fixed the problem and allowed NFS to work as before.

After wading through all the usual newbie how-to pages, I found this fix at www.linuxforums.org. I thought it important enough to post in at least one more place.

I don't understand why I needed this fix. I saw a note stating that this fstab line shouldn't be needed and that it is a result of a broken nfs-utils implementation. Perhaps it's a result of my running a custom 2.6.18.6 kernel on CentOS 4.4 but with the default (Redhat's) nfs-utils package.

Hope this helps someone in the future.

Kirk Bocek