diff --git a/README.md b/README.md
index 3c0ae5f..7ce396d 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,10 @@
 ```
 docker-compose exec master-jenkins ssh [SSH_HOST] -p [SSH_PORT]
 ```
+If this does not work. Please look for a `ssh-rsa` or `ssh-dsa` key with:
+```
+ssh-keyscan -p [SSH_PORT] [SSH_HOST]
+```
 
 ## Information
 ### ssh docker slave