changing my mac address permanently at ubuntu
 

is there any way to changing my mac address permanently at ubuntu.it is very much needed to me.is there any softwere .plz inform me.

What do you need it for? You can change your current MAC (, or using ifconfig and "hw ether" parameter). You can add it to the commands executed on each boot by patching beginning of /etc/event.d/network.. (I am no Ubuntu user, so no eact name) or maybe end of udev job. That will not permanently store new MAC onto card, but it will change effective MAC on each power on, and it will persist until power down.

The mac address is hard coded into every network interface device. You can only "spoof" your mac address (send out a different mac). Install macchanger in Ubuntu, you will have to apply the changes upon every boot. In Windows I use MacMakeup which re-applies the changes upon re-boot.