showmount —
show remote NFS mounts on host
  
    | showmount | [ -adEe3] [host] | 
showmount shows status information about the NFS server
  on host. By default it prints the names of all hosts
  that have NFS file systems mounted on the host. See NFS:
  Network File System Protocol Specification, RFC 1094, Appendix A, and
  NFS: Network File System Version 3 Protocol
  Specification, Appendix I, for a detailed description of the protocol.
  - -a
- List all mount points in the form:
    host:dirpath 
- -d
- List directory paths of mount points instead of hosts
- -E
- Show the host's exports list in a script-friendly
      format. Client addresses and the header are not shown, and special
      characters are escaped.
- -e
- Show the host's exports list
- -3
- Use mount protocol Version 3, compatible with NFS Version 3.
Theshowmount utility first appeared in
  4.4BSD.
The mount daemon running on the server only has an idea of the actual mounts,
  since the NFS server is stateless. showmount will only
  display the information as accurately as the mount daemon reports it.