Changing MAC in Ubuntu

If you want to change the MAC address in Ubuntu then follow the instructions below....

Open the terminal.
Now suppose : 3x:6b:3c:44:9r:22 is the new mac address you want to assign
Then enter the following command into terminal:

$ sudo ifconfig eth0 down
$ sudo ifconfig eth0 hw ether 3x:6b:3c:44:9r:22
$ sudo ifconfig etho up

Finally Check the new MAC address by using following command

$ ifconfig

Thank You.