新增 Service：netplan

Service%EF%BC%9Anetplan.md

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+# 多網路權重設定
+
+雙 DHCP
+
+```yaml
+network:
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: true
+      dhcp4-overrides:
+        route-metric: 200
+    eth1:
+      dhcp4: true
+      dhcp4-overrides:
+        route-metric: 100
+```
+
+靜態+動態
+
+```yaml
+network:
+  version: 2
+  ethernets:
+    ens18:
+      addresses:
+      - "172.25.43.200/20"
+      nameservers:
+        addresses:
+        - 168.95.1.1
+        - 8.8.8.8
+        search: []
+      routes:
+      - to: "0.0.0.0/0"
+        via: "172.25.32.1"
+        metric: 200
+    ens19:
+      dhcp4: true
+      routes:
+      - to: "0.0.0.0/0"
+        metric: 100
+```