Setting up the DNS in Linux can be done in a few steps.
sudo cp /etc/resolv.conf /etc/resolv.conf.auto
Now edit the dhclient
sudo gedit /etc/dhcp3/dhclient.conf
Look for the below line, which will be commented, and match this setting.
# append the following line to the document prepend domain-name-servers 18.104.22.168,22.214.171.124; sudo ifdown eth0 && sudo ifup eth0
Last line can also be done manually by just disable wireless and enable it from GUI.
You might be able to do this in the GUI as well depending on which Linux distrubtion you’re using.