Local DNS Cache for Faster Browsing

The package we will be using for caching nameserver lookups is called dnsmasq. So first, install it using:

$ sudo apt-get install dnsmasq

1. Go System -> Administration -> Networking
2. Click the DNS tab
3. Press the Add button and type 127.0.0.1 and press enter
4. Click on a different entry so that 127.0.0.1 isn’t highlighted and then click and drag 127.0.0.1 to the top of the list
5. Press OK and you’re done! :-)
   

BTW, you might consider using opendns.com instead of your local ISP’s DNS.

Source: UbuntuBlog
*check out the source, because this tutorial in incomplete..