pam/pam-system-auth

#%PAM-1.0
auth        required      pam_env.so
auth        required      pam_shells.so
auth        sufficient    pam_unix.so 
#auth        sufficient    pam_winbind.so use_first_pass
auth        required      pam_deny.so

#account     sufficient    pam_winbind.so
account     required      pam_unix.so

password    required      pam_pwquality.so retry=3 minlen=4 dcredit=2 ucredit=2
password    sufficient    pam_unix.so shadow md5 use_authtok 
password    required      pam_deny.so

session     optional      pam_limits.so
session     required      pam_unix.so
session     required      pam_mkhomedir.so
session     optional      pam_loginuid.so
session     optional      pam_systemd.so