1.进入目录

cd /etc/netplan

2.查看网关

route -n

3.编辑文件 vim 50-cloud-init.yaml

network:
  version: 2
  ethernets:
    enp0s5:
      dhcp4: no
      addresses: [192.168.90.100/24]
      # gateway4: 192.168.90.1
      routes:
        - to: default
          via: 192.168.90.1  # 设置默认路由
      nameservers:
        addresses: [114.114.114.114, 8.8.8.8]

4.使配置生效

netplan apply

5.参考地址