diff --git a/How-to-run-multiple-user-docker-daemons.md b/How-to-run-multiple-user-docker-daemons.md
index b48e0b9..0f11be6 100644
--- a/How-to-run-multiple-user-docker-daemons.md
+++ b/How-to-run-multiple-user-docker-daemons.md
@@ -115,6 +115,14 @@ OPTIONS:
     --authorized-keys value
 ```
 
+For `--authorized-keys`, user needs to put the key file in one of the following directories:
+```
+/var/lib/rancher/
+/opt/
+/home/
+```
+
+
 We will generate a random password for each OUD container, which users can see in the container logs. This password is useful when the users do not set the keys.
 
 ```