yppoll - return version and master server of a NIS map
yppoll [ -h host ] [ -d domain ] mapname
Ask the NIS server process running on host for information about
mapname. If host is not specified, the server polled is the
default server returned by ypwhich(1).
Specify a domain other than the default domain as returned by
domainname(8), ypbind(8), ypcat(8), ypmatch(1), ypserv(8), yset(8),
yppoll is part of the yp-tools package, which was written by Thorsten