How to change the Network Card MAC Address on Ubuntu

Today I had a problem with running two Ubuntu VMware images on my PC.

The second image I’ve started I didn’t get an IP address, so the Ubuntu install was not able to connect to the Internet.

I discovered that it was caused by the fact that both Ubuntu sessions had the same MAC address.

This is the way I solved the problem:

We need to edit the file;

sudo gedit /etc/network/interfaces

Now we should see the line for our network interface, which is usually eth0. If DHCP is enabled in your install, you should see something like this;

auto eth0
iface eth0 inet dhcp

Now we add a line where we define our MAC address;

auto eth0
iface eth0 inet dhcp
hwaddress ether 01:02:03:04:05:06

You can give it any MAC address you want, the line above is just an example

After you’ve added the line to your file be sure to reboot your Ubuntu VMware session or restart networking by running the following command;

sudo /etc/init.d/networking restart

After this you should be able to run two identical Ubuntu VMware sessions at the same time!

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