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diff --git a/doc/book-enea-nfv-access-user-hardening-guide/doc/introduction.xml b/doc/book-enea-nfv-access-user-hardening-guide/doc/introduction.xml
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--- a/doc/book-enea-nfv-access-user-hardening-guide/doc/introduction.xml
+++ /dev/null
@@ -1,102 +0,0 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
-<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-<chapter id="overview">
-  <title>Overview</title>
-
-  <para>This document describes a set of activities needed for securing Enea
-  NFV Access by users. Most security hardening configurations and features
-  affect performance, and should only be set if more security but less
-  performance is required and acceptable. We emphasize to use layers of
-  security to get the desired degree of hardening.</para>
-
-  <section id="intro">
-    <title>Introduction</title>
-
-    <para>This document describes several hardening techniques and Open Source
-    tools available for Enea NFV Access.</para>
-
-    <section id="rev-hist">
-      <title>Revision History</title>
-
-      <table>
-        <tgroup cols="4">
-          <colspec align="center" />
-
-          <thead>
-            <row>
-              <entry align="center">Revision</entry>
-
-              <entry align="center">Author</entry>
-
-              <entry align="center">Date</entry>
-
-              <entry align="center">Purpose of Revision</entry>
-            </row>
-          </thead>
-
-          <tbody>
-            <row>
-              <entry>3</entry>
-
-              <entry>Sona Sarmadi</entry>
-
-              <entry>2017-09-07</entry>
-
-              <entry>Added Introduction to Information Security, sec
-              2.</entry>
-            </row>
-
-            <row>
-              <entry>2</entry>
-
-              <entry>Sona Sarmadi</entry>
-
-              <entry>2017-09-07</entry>
-
-              <entry>Updated section 2.</entry>
-            </row>
-
-            <row>
-              <entry>1</entry>
-
-              <entry>Sona Sarmadi</entry>
-
-              <entry>2017-08-31</entry>
-
-              <entry>Initial Revision, hardening guideline for users.</entry>
-            </row>
-          </tbody>
-        </tgroup>
-      </table>
-    </section>
-
-    <section id="references">
-      <title>References</title>
-
-      <itemizedlist>
-        <listitem>
-          <para><ulink
-          url="https://www.sans.org/reading-room/whitepapers/linux/linux-kernel-hardening-1294">www.sans.org/reading-room/whitepapers/linux/linux-kernel-hardening-1294</ulink></para>
-        </listitem>
-
-        <listitem>
-          <para><ulink
-          url="https://lwn.net/Articles/705262/">lwn.net/Articles/705262/</ulink></para>
-        </listitem>
-      </itemizedlist>
-    </section>
-
-    <section id="def_acro">
-      <title>Definitions and Acronyms</title>
-
-      <para>Definitions</para>
-
-      <para>[FIXME]</para>
-
-      <para>Acronyms</para>
-
-      <para>[FIXME]</para>
-    </section>
-  </section>
-</chapter>
\ No newline at end of file