Ubuntu 20.04 LTS comes with Netplan for configuration of your network interfaces. So forget your /etc/network/interfaces and follow the next steps to setup your Raspberry with a Fixed IP on both cabled and wireless network.
Ubuntu 20.04 LTS comes with Netplan for configuration of your network interfaces. So forget your /etc/network/interfaces and follow the next steps to setup your Raspberry with a Fixed IP on both cabled and wireless network.