diff --git a/README.md b/README.md
index 14d3e92..c8dff8c 100644
--- a/README.md
+++ b/README.md
@@ -527,6 +527,7 @@ exit 0
 ```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
+# $ sudo vim /etc/netplan/00-installer-config.yaml  # Ubuntu 20.04LTS
 # 
 ```