-grep 'enable_security_group = True' $ML2_CONF_FILE
-grep 'extension_drivers = port_security' $ML2_CONF_FILE
-grep 'prevent_arp_spoofing = False' $ML2_CONF_FILE
+grep -n 'enable_security_group = True' $ML2_CONF_FILE
+grep -n 'extension_drivers = port_security' $ML2_CONF_FILE
+grep -n 'prevent_arp_spoofing = False' $ML2_CONF_FILE