Update userdata section

Author: weizhouapache

source/adminguide/templates.rst

@@ -444,7 +444,7 @@ hypervisor-specific.
 
 
 Adding an ISO
----------------
+-------------
 
 To make additional operating system or other software available for use
 with Guest Instances, you can add an ISO. The ISO is typically thought of as

source/adminguide/templates/_create_linux.rst

@@ -30,12 +30,12 @@ An overview of the procedure is as follow:
 #. Upload your Linux ISO.
 
    For more information, see `“Adding an
-   ISO” <virtual_machines.html#adding-an-iso>`_.
+   ISO” <templates.html#adding-an-iso>`_.
 
 #. Create an Instance with this ISO.
 
    For more information, see `“Creating
-   VMs” <virtual_machines.html#creating-instances>`_.
+   Instnaces” <virtual_machines.html#creating-instances>`_.
 
 #. Prepare the Linux Instance
 

source/adminguide/virtual_machines/user-data.rst

@@ -217,6 +217,8 @@ Instance deployment automatically (:ref:`adding-password-management-to-templates
 
       datasource_list: [ CloudStack, None ]
 
+For more information, see `Cloud-init integration <templates/_cloud_init.html#linux-with-cloud-init>`_
+
 Custom user-data example
 ~~~~~~~~~~~~~~~~~~~~~~~~