NetPlan

Ubuntu 18.04 ships with NetPlan instead of the standard /etc/network/interfaces file. I found the documentation to be fairly scarce, so I'll leave a few examples and snippets here.

General

Be sure to apply / test changes with sudo netplan generate and sudo netplany apply

Simple Static Host

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: no
      addresses: [ 192.168.1.100/24 ]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [ 192.168.1.1 ]
        search: [ ljlapierre.com ]

Bridge Config