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If you are wondering how to change the MAC address of your ethernet adaptor(eth0) or your wifi device (wlan) under Linux, its here !!!
I suppose you want to get the mac address 00:11:22:33:44:55
Connect through console using superuser root:
ifconfig eth0 down
ifconfig eth0 hw ether 00:11:22:33:44:55
ifconfig eth0 up
ifconfig eth0 |grep HWaddr