auth       requisite  pam_securetty.so
auth       required   pam_unix.so
#auth       optional   pam_group.so
account    requisite  pam_time.so
#account    required   pam_unix.so
#password   required   pam_cracklib.so retry=3
#password   required   pam_unix.so shadow md5 use_authtok
session    required   pam_unix.so
session	   optional   pam_lastlog.so