[system-administrators-guide] Added the Chrony chapter to the Preface.

[jhradile]

commit 474ea3276af35cb165cc324c7595e10508149770
Author: Jaromir Hradilek <jhradilek at redhat.com>
Date:   Mon Jul 1 14:28:22 2013 +0200

    Added the Chrony chapter to the Preface.

 en-US/Configuring_NTP_using_the_Chrony_suite.xml |    2 +-
 en-US/Preface.xml                                |    7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/en-US/Configuring_NTP_using_the_Chrony_suite.xml b/en-US/Configuring_NTP_using_the_Chrony_suite.xml
index b903cb9..0425fec 100644
--- a/en-US/Configuring_NTP_using_the_Chrony_suite.xml
+++ b/en-US/Configuring_NTP_using_the_Chrony_suite.xml
@@ -5,7 +5,7 @@
 ]>
 <!--Topics, Concepts:-->
 
-<chapter id="chap-Networking_Guide-Configuring_NTP_using_the_chrony_suite">
+<chapter id="chap-Configuring_NTP_Using_the_chrony_Suite">
 	<title>Configuring NTP Using The chrony Suite</title>
 	<para>
 		Accurate time keeping is important for a number of reasons in IT. In networking for example, accurate time stamps in packets and logs are required. In Linux systems, the <systemitem class="protocol">NTP</systemitem> protocol is implemented by a daemon running in user space.</para>
diff --git a/en-US/Preface.xml b/en-US/Preface.xml
index 301f160..9eb64a3 100644
--- a/en-US/Preface.xml
+++ b/en-US/Preface.xml
@@ -53,13 +53,16 @@
         <term><xref linkend="part-Basic_System_Configuration" /></term>
         <listitem>
           <para>
-            This part covers basic system administration tasks such as keyboard configuration, date and time configuration, and managing users and groups.
+            This part covers basic system administration tasks such as keyboard configuration, date and time configuration, installation and initial setup of an NTP server, and managing users and groups.
           </para>
           <para>
             <xref linkend="ch-Configuring_the_Language_and_Keyboard" /> covers basic language and keyboard setup. Read this chapter if you need to configure the language of your desktop, change the keyboard layout, or add the keyboard layout indicator to the panel.
           </para>
           <para>
-            <xref linkend="ch-Configuring_the_Date_and_Time" /> covers the configuration of the system date and time. Read this chapter if you need to change the date and time setup, or configure the system to synchronize the clock with a remote Network Time Protocol (NTP) server.
+            <xref linkend="ch-Configuring_the_Date_and_Time" /> covers the configuration of the system date and time. Read this chapter if you need to set or change the date and time.
+          </para>
+          <para>
+            <xref linkend="chap-Configuring_NTP_Using_the_chrony_Suite" /> covers the installation and configuration of the chrony suite, a client and a server for the Network Time Protocol (NTP). Read this chapter if you need to configure the system to synchronize the clock with a remote NTP server, or set up an NTP server on this system.
           </para>
           <para>
             <xref linkend="ch-Managing_Users_and_Groups" /> covers the management of users and groups in a graphical user interface and on the command line. Read this chapter if you need to manage users and groups on your system, or enable password aging.