Add schedule tasks

Author: SebastianPrehn

docs/index.rst

@@ -26,6 +26,7 @@ ERDA/SIF: User Guides
    sections/erda/networkdrive/index
    sections/erda/seafile/index
    sections/erda/archiving/index
+   sections/erda/scheduletask/index
 
 .. toctree::
    :maxdepth: 2

docs/sections/erda/scheduletask/index.rst

@@ -0,0 +1,12 @@
+.. _erda-scheduletask-start:
+
+Schedule Tasks
+==============
+
+It is possible to have ERDA do a number of tasks on your behalf with the **Schedule Tasks** functionality.
+The corresponding navigation menu entry is not shown by default to keep it simple, but you can **Add** it to your home page, which you can read more about on <erda-homepage-start>`.
+
+On the **Schedule Tasks** page you can schedule one-time or regularly repeat tasks, such as inserting a task to create a new backup archive every day with the contents of some folder on ERDA.
+
+You can follow scheduled runs in the **View Logs** tab.
+You can also read more about the automatic variables and available commands at the bottom of the **Manage Tasks** tab on the **Schedule Tasks** page.