--- a/gcloud.rst	Sun Jan 03 23:39:41 2021 +0200
+++ b/gcloud.rst	Mon Jan 04 10:30:27 2021 +0200
@@ -3,6 +3,12 @@
  Google Cloud
 ==============
 
+Essential documentation
+=======================
+
+https://cloud.google.com/iam/docs/understanding-roles
+  List of Predefined roles with Permissions.
+
 gcloud filter syntax
 ====================