/usr/lib/yp/pwupdate [shadow]
pwupdate is invoked by rpc.yppasswdd(8) after changing the password and it should update the passwd and shadow NIS map. Never run it by hand.
shadow
/etc/passwd, /etc/shadow
Olaf Kirch <okir@monad.swb.de>, Thorsten Kukuk <kukuk@suse.de>