Step by Step Change Network Card MAC Address
MAC stands for Media Access Control and in a sense the MAC address is a computer’s true name on a LAN. An Ethernet MAC address is a six byte number, usually expressed as a twelve digit hexadecimal number.
To change this setting, we’ll need to edit the /etc/network/interfaces file. You can choose to use a different editor if you’d like.
$ sudo gedit /etc/network/interfaces
You should see the line for your network interface, which is usually eth0. If you have dhcp enabled, it will look like this:
iface eth0 inet dhcp
Simply add another line below it.
hwaddress ether 00:23:AE:05:78:CB
Save and exit the file.
$ sudo /etc/init.d/networking restart