yppoll --version (return code: 0)
yppoll (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.
yppoll --help (return code: 0)
Usage: yppoll [-h host] [-d domain] mapname
yppoll - return version and master server of a NIS map
-h host Ask ypserv process at 'host'
-d domain Use 'domain' instead of the default domain
-?, --help Give this help list
--usage Give a short usage message
--version Print program version