diff --git a/sudo.md b/sudo.md
index 46a1561..bc872ec 100644
--- a/sudo.md
+++ b/sudo.md
@@ -8,4 +8,24 @@ Using `sudo` is not recommended. If not properly configured to not ask for passw
 
 Now, if you are completely sure of the issues and the possibilities with the usage of `sudo` and still want to use it, you can pass the `--force` parameter.
 
-**Remember:** Using `sudo` is not recommended. You have the option to force it at your own risk. You have been warned.
\ No newline at end of file
+**Remember:** Using `sudo` is not recommended. You have the option to force it at your own risk. You have been warned.
+
+
+If you need root,  please su to root first, and then install acme.sh and use it.
+
+```sh
+
+#unstall for current user
+acme.sh --uninstall
+
+#change to root
+sudo su
+
+#install again for root user
+curl https://get.acme.sh | sh
+
+#use it
+bash
+acme.sh --issue -d .....
+
+```