Change MAC address for your Ethernet adapter in Linux

Run the following commands from bash shell (yes you may need to cd to /etc first):

cd /etc
sudo vim rc.local

Add the following lines before "exit 0" (change the MAC address as needed):

/sbin/ifconfig eth2 down
/sbin/ifconfig eth2 hw ether 00:00:00:00:00:00
/sbin/ifconfig eth2 up

Restart your system and it should be OK.

If you want to temporarily change your MAC address, simply run the 3 lines of commands at bash shell prompt.