yppoll - determine which version of a Network Information Service (NIS) map
is at a master NIS server host
yppoll [-h host] [-d domain] mapname
Ask the ypserv process at host about the map parameters (order number
and master server for the map). If host is not specified, the NIS
server for the local host is used. That is, the default host is the one
returned by ypwhich(1).
Use domain instead of the default domain.
The yppoll command asks a ypserv process for the domain, order number, and
master NIS server (also known as map parameters) associated with the named
map. If the server is a v.1 NIS protocol server, yppoll uses the older pro-
tocol to communicate with ypserv and uses the older diagnostic messages if
a failure occurs.