RPC: Program not registered

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This article/section is a stub — probably a pile of half-sorted notes and assertions some of which may well be wrong, and not verified as a whole. Feel free to add or refine.

Likely means the portmapper on port 111 isn't reachable, often because it's not installed or is firewalled.

In my case (trying to use NFS) it borked as soon as a connection comes in because of bad error handling. I worked around it by installing a different version.