Ubuntu—gateway4 has been deprecated错误解决

问题

下面是Ubuntu20.04的网卡设置，但是在Ubuntu22.04的时候会报警告，如下：

** (generate:1352): WARNING **: 00:41:47.584: gateway4 has been deprecated, use default routes instead.
See the ‘Default routes’ section of the documentation for more details.

network:
  ethernets:
    ens18:
      addresses:
      - 192.168.3.10/24
      gateway4: 192.168.3.1
      nameservers:
        addresses: [192.168.3.1]
        search: []
      optional: true

  version: 2

解决

network:
  ethernets:
    ens18:
      addresses:
      - 192.168.3.70/24
      routes:
        - to: default
          via: 192.168.3.1
      nameservers:
        addresses: [192.168.3.1]
        search: []
      optional: true

  version: 2