yppasswd --version (return code: 0)
yppasswd (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.
yppasswd --help (return code: 0)
Usage: yppasswd [-f] [-l] [-p] [User]
yppasswd - change your password in the NIS database
-f Change GECOS field information
-l Change the login shell
-p Change the password
-?, --help Give this help list
--usage Give a short usage message
--version Print program version