how to count nfs clients attached to my server?

[Timothy Murphy]

Steve Berg wrote:

> /usr/sbin/showmount will give you a list of IP's connected.

I had never heard of this program, so I ran it and got
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[tim at carrie ~]$ sudo showmount -a
showmount: RPC: Program not registered
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How is one meant to "register" the program?

-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland