Add to userguide external repos

Add external repos description and links
to the userguide.

Change-Id: I8a1dc20b68cd8e96e746bd8bacc5e1335f8cc13e

contents/contents-user.rst

@@ -12,3 +12,5 @@
 .. include:: /pages/user-guide/9000-role-operations.rst
 .. include:: /pages/user-guide/cli.rst
 .. include:: /pages/user-guide/vmware-integration-notes.rst
+.. include:: /pages/user-guide/external-repos-ug.rst
+.. include:: /pages/user-guide/mos-linux-separate.rst

pages/user-guide/external-repos-ug.rst

@@ -0,0 +1,12 @@
+.. raw:: pdf
+
+   PageBreak
+
+.. _external-repos-ug:
+
+Downloading Ubuntu packages
+---------------------------
+
+For information on how to download Ubuntu packages from the
+Ubuntu official mirrors or from your local repositories
+see :ref:`Downloading Ubuntu system packages<external-ubuntu-ops>`.

pages/user-guide/mos-linux-separate.rst

@@ -0,0 +1,12 @@
+.. raw:: pdf
+
+   PageBreak
+
+.. _mos-linux-separate-ug:
+
+Separate Mirantis OpenStack and Linux packages
+----------------------------------------------
+
+The repositories for Mirantis OpenStack and Linux packages are separate.
+For a detailed description
+see `Separate Mirantis OpenStack and Linux Repositories <https://docs.fuel-infra.org/fuel-dev/develop/separateMOS.html>`_.