On a Unix/Linux system, which command is commonly used to see the services running on an NFS (Network File System) server?

Introduction / Context:
NFS (Network File System) is widely used to share files across Unix/Linux systems. To troubleshoot or verify NFS service availability, administrators must know the command that lists running services.

Given Data / Assumptions:

• The target is an NFS server.
• We want to list services registered with the RPC portmapper.

Concept / Approach:

The rpcinfo command queries the RPC bind (portmapper) service, which manages NFS services. By running rpcinfo -p servername, administrators can see ports and versions of NFS-related daemons.

Step-by-Step Solution:

Verification / Alternative check:

Cross-check with systemctl status nfs-server or showmount -e servername for exports.

Why Other Options Are Wrong:

• serverinfo, NFSinfo, infserv: not valid Linux commands.
• None of the above: incorrect because rpcinfo is correct.

Common Pitfalls:

• Running rpcinfo without -p lists nothing useful; always include -p.
• Confusing rpcinfo with showmount (which only shows shared exports).

Final Answer:

rpcinfo.