(DOCS-13954): Provide validation steps to make sure that Operator is installed correctly (#435)

* (DOCSP-13954): Added installation verification information.

* (DOCSP-13954): Fixed code-block markup.

* (DOCSP-13954): Added namespace to the original command.

Author: corryroot

source/tutorial/install-k8s-operator.txt

@@ -86,6 +86,24 @@ environment:
 
             .. include:: /includes/install/install-os-offline-helm.rst
 
+Verify the Installation
+-----------------------
+
+To verify that the |k8s-op-short| installed correctly, run the 
+following command and verify the output:
+
+.. code-block:: sh
+
+   kubectl describe deployments mongodb-enterprise-operator -n <namespace>
+
+By default, deployments exist in the ``mongodb`` namespace. If the 
+following error message appears, ensure you use the correct 
+namespace:
+
+.. code-block:: sh
+
+   Error from server (NotFound): deployments.apps "mongodb-enterprise-operator" not found
+
 .. include:: /includes/troubleshoot-k8s.rst
 
 Next Steps