Ubuntu-18-ipv4-ipv-6

vim /etc/netplan/50-cloud-init.yaml

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp10s0:
            addresses: [192.168.0.**/24]
            gateway4: *.*.*.*
            nameservers:
              addresses: [*.*.*.*]
            dhcp6: true
        enp5s0:
            addresses: []
            dhcp4: true
            optional: true
    version: 2