fix instructions for ubuntu to look for deb files (docker#2507)

andrewhsu · Misty Stanley-Jones · commit ff26006b5c8d · 2017-03-27T17:12:04.000-07:00
Signed-off-by: Andrew Hsu &lt;andrewhsu@docker.com&gt;
diff --git a/engine/installation/linux/ubuntu.md b/engine/installation/linux/ubuntu.md
@@ -285,7 +285,7 @@ a new file each time you want to upgrade Docker.
 
     - **Docker EE**: Go to the Docker EE repository URL associated with your
       trial or subscription in your browser. Go to `x86_64/stable-{{ minor-version }}` and download
-      the `.rpm` file for the Docker version you want to install.
+      the `.deb` file for the Docker version you want to install.
 
 2.  Install Docker, changing the path below to the path where you downloaded
     the Docker package.
