Tianon made a micro-image (sub one meg?) that we can use as a very fast to download 'yes, your docker can download and run an image' test

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)

docs/sources/installation/google.md

@@ -27,8 +27,10 @@ page_keywords: Docker, Docker documentation, installation, google, Google Comput
 4. Connect to the instance using SSH:
 
         $ gcloud compute ssh --zone us-central1-a docker-playground
-        docker-playground:~$ sudo docker run busybox echo 'docker on GCE \o/'
-        docker on GCE \o/
+        $$ docker-playground:~$ sudo docker run hello-world
+	Hello from Docker.
+	This message shows that your installation appears to be working correctly.
+	...
 
 Read more about [deploying Containers on Google Cloud Platform][5].
 

docs/sources/installation/mac.md

@@ -56,12 +56,12 @@ and `boot2docker start`.
 
 ## Running Docker
 
-From your terminal, you can test that Docker is running with a “hello world” example.
+From your terminal, you can test that Docker is running with the small `hello-world` example image.
 Start the vm and then run:
 
-    $ docker run ubuntu echo hello world
+    $ docker run hello-world
 
-This should download the `ubuntu` image and print `hello world`.
+This should download the very small `hello-world` image and print a `Hello from Docker.` message.
 
 ## Container port redirection
 

docs/sources/installation/windows.md

@@ -51,11 +51,11 @@ and the Boot2Docker management tool.
 
 Boot2Docker will log you in automatically so you can start using Docker right away.
 
-Let's try the “hello world” example. Run
+Let's try the `hello-world` example image. Run
 
-    $ docker run busybox echo hello world
+    $ docker run hello-world
 
-This will download the small busybox image and print "hello world".
+This should download the very small `hello-world` image and print a `Hello from Docker.` message.
 
 
 # Further Details

hack/install.sh

@@ -85,7 +85,7 @@ case "$lsb_dist" in
 		if command_exists docker && [ -e /var/run/docker.sock ]; then
 			(
 				set -x
-				$sh_c 'docker run busybox echo "Docker has been successfully installed!"'
+				$sh_c 'docker run hello-world'
 			) || true
 		fi
 		your_user=your-user
@@ -150,7 +150,7 @@ case "$lsb_dist" in
 		if command_exists docker && [ -e /var/run/docker.sock ]; then
 			(
 				set -x
-				$sh_c 'docker run busybox echo "Docker has been successfully installed!"'
+				$sh_c 'docker run hello-world'
 			) || true
 		fi
 		your_user=your-user