To change your MAC address in Linux is easy .

Type below commands in terminal

Bring down the interface: ifconfig eth0 down

Enter new MAC address: ifconfig eth0 hw ether XX :XX:XX:XX:XX:XX

Bring up the interface: ifconfig eth0 up

above  commands  set your etho  interface to use the MAC XX :XX:XX:XX:XX:XX. Just plug in the NIC you want to set and the MAC address you want to use into the commands above and your all set .

Note :Caution before using this above steps,I shall not be responsible for any damages or rules and regulation you violate from changing the mac id.