ubuntu 20.04 LTS IP及上网设置

network:
  ethernets:
    ens12f0:
      dhcp4: false
      addresses: [192.168.242.53/24]
      optional: true
      gateway4: 192.168.242.1
      nameservers:
        addresses: [8.8.8.8]
    ens12f1:
      dhcp4: true
    ens12f2:
      dhcp4: true
    ens12f3:
      dhcp4: true
    ens42f0:
      dhcp4: true
    ens42f1:
      dhcp4: true
  version: 2

sudo vi /etc/netplan/00-installer-config.yaml 

sudo netplan apply