Hi, I am trying to change mac address in this way: subsystem=="usb", action=="add", attrs{idvendor}, attr{address}="00:11:22:33:44:55" But this generates the error "error opening ATTR{/sys/deivces/.../net/eth1/address} for writing: Permission denied I know that NetworkManager is able to change mac address and I guess NM uses udev to change mac. Could you please advice me how to change mac using udev. Kind regards, S -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html