rocklinux/package/base/pam/etc_pamd_su.txt

#
# PAM Configuration for 'su'. The only difference to the 'other' config
# ist the 'pam_rootok.so' entry for 'auth'.
#
# Some documentation on this file format can be found at:
# http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam.html
#

auth		sufficient	pam_rootok.so
auth		required	pam_unix.so	nullok

account		required	pam_unix.so

session		required	pam_unix.so

password	required	pam_cracklib.so
password	required	pam_unix.so	use_authtok md5