I have the following setup;

NFS Server --> RH Linux 2.6.9-11
NFS Client --> HP-UX 10.20

When I NFS mount a filesystem onto the HP-UX 10.20 client, and traverse to the directory using C-Shell (csh), the mountpoint disappears when I do a "pwd".

For example, if I have a Linux NFS Server called hosta with an exported directory called "/export/fs01", on the HP-UX 10.20 Client, I type the following, and get the following results;

mount hosta:/export/fs01 /export/fs01
cd /export/fs01
pwd returns "/export/fs01"
cd /export/fs01/subdir
pwd returns "/subdir"

This problem only exists with the CSH on HP-UX 10.20 NFS Client, and RH Linux 2.6.9-11 NFS Server. All other shells, and all other combinations of NFS clients and NFS servers do not have this problem.

Any ideas ?

Hmm, interesting little problem.

do you need to use the C shell?

It may be a bug with hp-ux 10.20 and /or the C shell version with that release. Have you check it out on the HP forums or website?

However could this be that CSH actually uses cwd to get absolute path names? On reflection i would think it might be chs on hp-ux 10.20. which is a pretty old version (i am using v11i(1) at the moment....