Set a Static IP in Ubuntu Server 18.04

In v18.04 of Ubuntu Server you need to use Netplan to set a static IP.

** don’t use tabs for indentation, yaml doesn’t like tabs **

sudo cp /etc/netplan/<filename> /etc/netplan/<filename>.bak

sudo nano /etc/netplan/<filename>

network:
       ethernets:
               eth0:
                    addresses: []
                    gateway4:
                    dhcp4: no
                    nameservers:
                        addresses: [1.1.1.1,1.0.0.1]
                    optional: true
         version: 2

Now press Ctrl + O then Ctrl + X

sudo netplan apply

Your static IP is now configured.