auth		sufficient	pam_rootok.so
  auth		required	pam_wheel.so use_uid
  auth		required	pam_env.so
  auth		required	pam_unix.so nullok
  
  account		required	pam_unix.so
  
  password	required	pam_unix.so nullok
  
  session		required	pam_limits.so
  session		required	pam_env.so
  session		required	pam_unix.so
  session		optional	pam_lastlog.so