How to change DNS Servers in Ubuntu Linux

  1. Left-click Network Manager icon from the System Tray
  2. Click “Edit Connections” from the menu
  3. Select the appropriate tab (“Wired/Wireless“) depending on your connection
  4. Double-click your connection
  5. Select the IPv4 or IPv6 tab depending on your connection (if you’re not sure, you’re probably using IPv4)
  6. Change the “Method” to “Automatic (DHCP) addresses only”
  7. In the DNS servers box, enter two server IP addresses from here separated by a comma.
  8. Click “Save
  9. Disconnect and reconnect to your network; restart your browser.

You should now be using OpenNIC; try visiting a domain on an OpenNIC TLD like grep.geek or bithunt.bit.