> On a Linux 2.6 kernel (I'm using RHEL 5), how is the pcnfsd daemon
> started?

You don't run pcnfsd on the client; pcnfsd has to run on the server
side. It's a hack to allow non-Unix systems to authenticate a connection
from a non-Unix system and get a valid numeric UID so that NFS security
works. 

You need to get the mountpw command (source is provided by IBM) and run
it prior to trying to mount the filesystem on the Linux guest. Mountpw
allows you to supply a VM userid and pw to authenticate the client,
which will then use the authentication token created by mountpw when the
actual mount request comes in. 

See http://204.146.134.18/NFS/ixsfs32.html for descriptions. If you
don't have mountpw, you should be able to get the source from the links
on that page and tell it you're an AIX system when you compile it (it
may have Linux ifdefs now; didn't a while ago).

Be careful and read the restrictions for security if you use CMS NFS.
There are some gotchas there that aren't IBM's fault (NFS isn't a very
well designed protocol), but could expose more than you want exposed. 

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