It’s quite simple to change the network interface MAC adress on Linux but not everybody knows it, so here it is, with two simple commands we can change our MAC (Media Access Control) address. It should works for other unix based systems as well, but I haven’t tested it yet.

So, as a network-system administrator, someday in your life, you may get a conflicted MAC address, so instead of throwing down your NIC interface to the trash and get a new one, you CAN change the MAC address for a valid one and it’s pretty easy.

So, here we go:

#ifconfig eth0 down hw ether 00:00:00:00:00:05

#ifconfig eth0 up

At this point, your ethernet interface should be working with the new MAC address.

References:

http://en.wikipedia.org/wiki/MAC_address