I have two systems. One is a 32-bit Pentium IV running Fedora Core 4. The other is a dual G5 Power Macintosh running Mac OS X 10.4.3. I am trying to configure things so the two computer will be able to transfer information using NFS.

I configured my Linux system for NFS, and tested the configuration by mounting the NFS share locally. I now want to try to mount the share on the Macintosh. However when I go to the Mactinosh Terminal and type the command:

showmount -e <Linux IP Address>

I get the following output:

RPC: Program not registered: Can't do Exports rpc

What does this result indicate?
What do I need so that my Macintosh is aware of which NFS shares are available from the Linux system?

This looks like your mac can't talk to the other system's port mapper. Either it's not running (not sure if you'd be able to locally mount the disk then), or a firewall on the server, client, or both blocks the portmapper's port (111).

Make sure that a portmapper is running on both ends. Then, as a quick test, shut down the firewall on the Linux system and try again. If that works, add the proper firewall conduit, and restart the FW -- don't run without.

Post back if that doesn't work for more specific tests.

Hope it helps,
mlp

When I run rpcinfo -p on the Linux box I get:

program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper

I get similar output on the Macintosh. Also, I know that NFS is working on my Macintosh because I have two Macintosh system and I was able to get one system to mount an NFS share from the other without any problems.

I have shut down the firewall on both the Linux and Macintosh. Without shutting down the firewalls, I don't get any output from the showmount command. I figured I should get NFS working without firewalls before worrying about reactivating those firewalls.