DOCSP-4271 Adds Troubleshooting link - Backport to v5.0 (#3190)

* DOCSP-4271 Adds Troubleshooting link to MongoDB Enterprise on Ubuntu page (#3149)

* Fixes build error

Author: kennethdyer

source/tutorial/install-mongodb-enterprise-on-ubuntu.txt

@@ -68,6 +68,10 @@ Follow these steps to install MongoDB |edition| Edition using the
 
 .. include:: /includes/steps/install-mongodb-enterprise-on-ubuntu.rst
 
+For help with troubleshooting errors encountered while installing
+MongoDB on Ubuntu, see our
+:ref:`troubleshooting <install-ubuntu-troubleshooting>` guide.
+
 Run MongoDB Enterprise Edition
 ------------------------------