How to Change MAC Address (MAC Spoofing) in Linux and *nix

To change your MAC address in Linux and most Unix-like (*nix) system, run the following script commands:
ifconfig <interface> down

ifconfig <interface> hw <class> <MAC address>

ifconfig <interface> up
For example, the command looks lik “ifconfig eth0 down hw ether 1A:2B:3C:4D:5E:6F”. First command brings down the network interface, second command change its MAC address while third command bring up the interface again. Note that in some cases, to bring down and bring up the network interface, the following commands have to be used:
/etc/init.d/networking stop or /etc/init.d/network stop (in the case of Fedora Core 5)
/etc/init.d/networking start or /etc/init.d/network stop (in the case of Fedora Core 5)
Alternatively, for Fedora Code 5 Linux with Iproute2 tools installed, the following commands also can change the MAC address to spoofed version:
/etc/init.d/network stop

ip link set <interface> address 1A:2B:3C:4D:5E:6F

/etc/init.d/network start
For example, “ip link set eth0 address 1A:2B:3C:4D:5E:6F”. To check whether the MAC address has been spoofed, use ip link ls eth0 or ip addr ls eth0 instead of using ifconfig eth0.