Changing MAC Address

MAC (Media Access Control) Address is used to identify devices on a network.
It is used to communicate with devices on the internal (Private) network
First 3 digit of MAC address identify the manufacturer

ipconfig <interface> down
ipconfig <interface> hw ether 00:11:22:33:44:55
ipconfig <interface> up

Changes made using above method are reset on reboot
Use macchanger to make the changes permanent

How to find and change the MAC address on Linux