260119-Ubuntu20-04(netplan apply)系统启动后直接加载固定路由-系统启动固定路由

作用：(Ubuntu20.04系统启动后直接加载固定路由)让本机一启动就把 192.168.0.2 / .4 / .102 / .104 / .106 这 5 个地址“当成跟自己同一链路（link）上的邻居”，无需网关即可直达，ARP 解析后直接发包。

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network:
    ethernets:
        eno1:
            dhcp4: no
            addresses: [192.168.0.100/24]
            routes:
              - to: default
                via: 192.168.0.1
                scope: link
                metric: 10
        enp1s0:
          dhcp4: no
          addresses: [192.168.0.110/24]
          dhcp4-overrides:
            use-routes: false      # 拒绝 DHCP 下发的默认路由
          routes:                  # 你的 5 条主机路由
            - to: 192.168.0.2/32
              scope: link
            - to: 192.168.0.4/32
              scope: link
            - to: 192.168.0.102/32
              scope: link
            - to: 192.168.0.104/32
              scope: link
            - to: 192.168.0.106/32
              scope: link
    version: 2
    wifis: {}