netplan.io 实在是太烂了

假设 IPv4 地址是 AAA.BBB.CCC.DDD，修改 /etc/netplan/01-netcfg.yaml

# Network configuration file
# Auto generated by Ikoula

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: no
      addresses: 
        - AAA.BBB.CCC.DDD/24
        - "2a00:c70:1:AAA:BBB:CCC:DDD:1/96"
      gateway4: AAA.BBB.CCC.1
      gateway6: 2a00:c70:1:AAA:BBB:CCC::1
      nameservers:
        addresses: [213.246.36.14,213.246.33.144,80.93.83.11]

之后 netplan try 验证格式并回车应用，或者直接 netplan apply