Set static IP for ubuntu servers

Edit the file in /etc/netplan/50-cloud-init.yaml file like the following

network:
    ethernets:
        enp0s3:
            dhcp4: false
            addresses: [192.168.56.101/24]
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4]
        enp0s8:
            addresses: []
            dhcp4: true
            optional: true
    version: 2