cat /etc/pam.d/login
#%PAM-1.0
auth       required     pam_securetty.so
auth       required     pam_stack.so service=system-auth
auth       required     pam_nologin.so
account    required     pam_stack.so service=system-auth
password   required     pam_stack.so service=system-auth
session    required     pam_stack.so service=system-auth
session    optional     pam_console.so

#####################

cat /etc/pam.d/system-auth
#%PAM-1.0

auth        required      pam_env.so
auth        sufficient    pam_permit.so
auth        sufficient    pam_unix.so likeauth nullok
auth        sufficient    pam_ldap.so use_first_pass
auth        required      pam_deny.so

account     sufficient    pam_unix.so
account     sufficient    pam_ldap.so use_first_pass
account     required      pam_deny.so

password    required      pam_cracklib.so retry=3 minlen=0  dcredit=0  ucredit=0
password    sufficient    pam_unix.so nullok use_authtok md5 shadow
password    sufficient    pam_ldap.so
password    required      pam_deny.so

session     optional      pam_mkhomedir.so skel=/etc/skel/ umask=0022
session     required      pam_limits.so
session     required      pam_unix.so

##############################


ls -l /etc/pam.d
total 68
-rw-r--r--  1 root root 260 Sep 20 12:14 chfn
-rw-r--r--  1 root root 260 Sep 20 12:14 chsh
-rw-r--r--  1 root root 169 Jul 25  2005 halt
-rw-r--r--  1 root root 115 Sep 20 12:14 kbdrate
-rw-r--r--  1 root root 329 Sep 20 12:14 login
-rw-r--r--  1 root root 154 Sep 19 06:55 other
-rw-r--r--  1 root root 169 Jun 20  2004 passwd
-rw-r--r--  1 root root 169 Jul 25  2005 poweroff
-rw-r--r--  1 root root 169 Jul 25  2005 reboot
-rw-r--r--  1 root root 254 Aug 23  2005 secure-mcserv
-rw-r--r--  1 root root 352 Jan 30 13:41 simple_root_authen
-rw-------  1 root root 362 Sep  5 03:27 sshd
-rw-r--r--  1 root root 658 Jan 30 13:41 su
-rw-r--r--  1 root root 222 Dec 19 13:52 sudo
-rw-r--r--  1 root root 739 Feb 22 13:45 system-auth
-rw-r--r--  1 root root 296 Jan 11 15:19 xdm
-rw-r--r--  1 root root 115 Jan 11 15:19 xserver