diff --git a/css/style.css b/css/style.css
index e785d9756f..a9108892da 100644
--- a/css/style.css
+++ b/css/style.css
@@ -404,6 +404,10 @@ a.button.outline-btn {
     margin: 0;
 }
 
+.darkblue-btn {
+  background-color: #0C5176;
+}
+
 .outline-btn:hover,
 .primary-btn:hover,
 .secondary-btn:hover {
@@ -1758,11 +1762,11 @@ footer {
 
 
 /* Landscape */
-@media only screen 
-  and (min-device-width: 375px) 
-  and (max-device-width: 667px) 
+@media only screen
+  and (min-device-width: 375px)
+  and (max-device-width: 667px)
   and (-webkit-min-device-pixel-ratio: 2)
-  and (orientation: landscape) { 
+  and (orientation: landscape) {
     .nav-secondary,
     .nav-secondary-tabs.affix {
         height: 155px;
diff --git a/engine/installation/linux/centos.md b/engine/installation/linux/centos.md
index 2ea15a332d..5d173f4c25 100644
--- a/engine/installation/linux/centos.md
+++ b/engine/installation/linux/centos.md
@@ -122,7 +122,7 @@ Repository set-up instructions are different for [Docker CE](#docker-ce) and
     [prerequisites](#prerequisites).
 
     ```bash
-    $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockerurl'
+    $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockersuburl'
     ```
 
 3.  Install `yum-utils`, which provides the `yum-config-manager` utility:
diff --git a/engine/installation/linux/oracle.md b/engine/installation/linux/oracle.md
index feaa8c7c6d..6c341a722b 100644
--- a/engine/installation/linux/oracle.md
+++ b/engine/installation/linux/oracle.md
@@ -79,12 +79,12 @@ the repository.
 
 1.  Remove any existing Docker repositories from `/etc/yum.repos.d/`.
 
-2.  Store your EE repository URL in `/etc/yum/vars/dockerurl`. Replace
+2.  Store your EE repository URL in `/etc/yum/vars/dockersuburl`. Replace
     `<DOCKER-EE-URL>` with the URL you noted down in the
     [prerequisites](#prerequisites).
 
     ```bash
-    $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockerurl'
+    $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockersuburl'
     ```
 
 3.  Install `yum-utils`, which provides the `yum-config-manager` utility:
diff --git a/engine/installation/linux/rhel.md b/engine/installation/linux/rhel.md
index b069ea1939..34363f8cdb 100644
--- a/engine/installation/linux/rhel.md
+++ b/engine/installation/linux/rhel.md
@@ -79,12 +79,12 @@ the repository.
 
 2.  Store two `yum` variables in `/etc/yum/vars/`.
 
-    - Store your EE repository URL in `/etc/yum/vars/dockerurl`. Replace
+    - Store your EE repository URL in `/etc/yum/vars/dockersuburl`. Replace
       `<DOCKER-EE-URL>` with the URL you noted down in the
       [prerequisites](#prerequisites).
 
       ```bash
-      $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockerurl'
+      $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockersuburl'
       ```
 
     - Store your RHEL version string in `/etc/yum/vars/dockerosversion`.