DOCSP-20690 BACKPORT (#630)

Author: Dave

source/includes/steps-create-admin-then-enable-authentication.yaml

@@ -4,15 +4,32 @@ level: 4
 ref: start-without-auth
 pre: |
 
-   Start a standalone :binary:`~bin.mongod` instance without access
-   control.
-  
-   For example, open a terminal and issue the following:
+  Start a standalone :binary:`~bin.mongod` instance without access
+  control.
+
+  Open a terminal and run the following command as the ``mongod`` user:
 
 action:
   language: sh
   code: |
     mongod --port 27017 --dbpath /var/lib/mongodb
+post: |
+  The :binary:`~bin.mongod` instance in this tutorial uses
+  :option:`port 27017 <mongod --port>` and the ``/var/lib/mongodb``
+  data directory.
+  
+  The tutorial assumes that the ``/var/lib/mongodb`` directory exists
+  and is the default :setting:`~storage.dbPath`. You may specify a
+  different data directory or port as needed.
+
+  .. tip::
+  
+     When :binary:`mongod` starts, it creates some system files in the
+     ``/var/lib/mongodb`` directory. To ensure the system files have
+     the correct ownership, follow this tutorial as the ``mongod``
+     user. If you start :binary:`mongod` as the ``root`` user you will
+     have to update file ownership later. 
+
 ---
 stepnum: 2
 title: Connect to the instance.