ypmatch --version (return code: 0)
ypmatch (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.
ypmatch --help (return code: 0)
Usage: ypmatch [-d domain] [-kt] key ... mapname | -x
ypmatch - print the values of one or more keys from a NIS map
-d domain Use 'domain' instead of the default domain
-k Display map keys
-t Inhibits map nickname translation
-x Display the map nickname translation table
-?, --help Give this help list
--usage Give a short usage message
--version Print program version