diff --git a/README.Docker b/README.Docker
index 09f73f0..e53b144 100644
--- a/README.Docker
+++ b/README.Docker
@@ -29,6 +29,20 @@
 You can access the XOS login at http:<server>:8000, where <server> is
 the name of the server running Docker.
 
+5. From another terminal window, you can following command to find the container id
+
+   $ docker ps
+    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                    NAMES
+    a3b668454d21        xos:latest          "/bin/bash"         3 hours ago         Up 3 hours          0.0.0.0:8000->8000/tcp   romantic_bohr
+
+and then you can have another bash prompt (in a different TTY)
+
+   $ docker exec -it a3b668454d21 bash
+
+and start observer
+
+    # python /opt/xos/xos-observer.py
+
 STILL TO DO
 -----------
 * Test Observer