ypwhich --version (return code: 0)
ypwhich (yp-tools) 2.9
Copyright (C) 1998 Thorsten Kukuk.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
ypwhich --help (return code: 0)
Usage: ypwhich [-d domain] [[-t] -m [mname]|[-Vn] hostname] | -x
ypwhich - return name of NIS server or map master
-d domain Use 'domain' instead of the default domain
-m mname Find the master NIS server for the map 'mname'
-t Inhibits map nickname translation
-V n Version of ypbind, V2 is default
-x Display the map nickname translation table
-?, --help Give this help list
--usage Give a short usage message
--version Print program version