2) Look for your network adapters, you'll see you're primary one (enp1s0) - look for the second one. In my case in was enp2s0.
3) Type- sudo nano /etc/network/interfaces and add the following (using the name of your adapter you found in step 2)
iface enp2s0 inet dhcp
For Static ip-
iface enp2s0 inet static
dns-nameservers 220.127.116.11 18.104.22.168