diff --git a/README.md b/README.md
index 824659a..e4a9672 100644
--- a/README.md
+++ b/README.md
@@ -494,10 +494,42 @@ esac
 ```
 
 ```txt
-# 附註 rc.local1
+# 附註 rc.local
 #! /bin/sh
 sudo mongod --config /etc/mongod.conf &
 exit 0
 ```
 
+```
+
+### 五、網路設定
+```sh
+# 開機網站自動起始
+$ sudo vim /etc/netplan/50-cloud-init.yaml # 內容見附註 50-cloud-init.yaml 18.04開始設定改這
+# 
+```
+
+```txt
+# 50-cloud-init.yaml
+# 本範例有兩塊網卡，第一塊是DHCP，第二塊是固定IP
+# 其中因為子網路遮罩為255.255.255.0 ，所以是 /24
+# This file is generated from information provided by the datasource.  Changes
+# to it will not persist across an instance reboot.  To disable cloud-init's
+# network configuration capabilities, write a file
+# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
+# network: {config: disabled}
+network:
+    ethernets:
+        enp0s29u1u1u5:
+            dhcp4: true
+        enp6s0:
+            addresses:
+            - 192.168.1.142/24
+            gateway4: 192.168.1.1
+            nameservers:
+                addresses:
+                - 8.8.8.8
+                search:
+                - rulingcom.com
+    version: 2