Use this flag if the ypserv daemon is not running locally at the time you are running the ypxfr command. Otherwise, the ypxfr command displays an error message and the transfer fails. Domain Specifies a domain other than the default domain. The maps for the specified domain must exist. Forces the transfer to occur even if the version at the master is not more recent than the local version.
Host Gets the map from host specified, regardless of what the map says the master is.
If a host is not specified, the ypxfr command asks the NIS service for the name of the master and tries to get the map from there. The Host variable can contain a name or an Internet address in the form a.b.c.d. Requires the ypserv server, from which it obtains the maps to be transferred, use privileged IP ports. Since only root user processes are typically allowed to use privileged ports, this feature adds an extra measure of security to the transfer. If the map being transferred is a secure map, the ypxfr command sets the permissions on the map to 0600.