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 For more up to date examples, see Canonical's documentation site: https://netplan.io/examples

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 / VLAN Config

---
network:
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: no
  vlans:
    vl10:
      id: 10
      link: eno1
      accept-ra: no
    vl20:
      id: 20
      link: eno1
      accept-ra: no
  bridges:
    brLAN:
      addresses: [ 192.168.1.100/24 ]
      gateway4: 192.168.1.1
      nameservers:
        search: [ ljlapierre.com ]
        addresses: [ 192.168.1.1 ]
      interfaces: [ vl10 ]
    br20:
      dhcp4: no
      interfaces: [ vl20 ]