chapter07: Translate clock configuration

Also add a reference label in chapter6 glibc instruction.

chapter06/glibc.xml

@@ -398,7 +398,7 @@ EOF</userinput></screen>
 
     </sect3>
 
-    <sect3>
+    <sect3 id="conf-zone">
     <title>添加时区数据</title>
 
     <!--para>Install and set up the time zone data with the following:</para-->

chapter07/clock.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
   <!ENTITY % general-entities SYSTEM "../general.ent">
@@ -8,18 +8,20 @@
 <sect1 id="ch-scripts-clock" revision="systemd">
   <?dbhtml filename="clock.html"?>
 
-  <title>Configuring the system clock</title>
+  <title>配置系统时钟</title>
 
   <indexterm zone="ch-scripts-clock">
     <primary sortas="d-clock">clock</primary>
   <secondary>configuring</secondary></indexterm>
 
-  <para>This section discusses how to configure the
+  <!--para>This section discusses how to configure the
   <command>systemd-timedated</command> system service, which configures
-  system clock and timezone.</para>
+  system clock and timezone.</para-->
+  <para>本节讨论如何配置 <command>systemd-timedated</command> 系统服务，
+	  它的作用是配置系统时钟和时区。</para>
 
-  <para>If you cannot remember whether or not the hardware clock is set to UTC,
-  find out by running the <userinput>hwclock --localtime --show</userinput>
+  <!--para>If you cannot remember whether or not the hardware clock is set to UTC,
+  find out by running the <userinput>hwclock localtime show</userinput>
   command. This will display what the current time is according to the hardware
   clock. If this time matches whatever your watch says, then the hardware clock is
   set to local time. If the output from <command>hwclock</command> is not local
@@ -27,14 +29,31 @@
   the proper amount of hours for the timezone to the time shown by
   <command>hwclock</command>. For example, if you are currently in the MST
   timezone, which is also known as GMT -0700, add seven hours to the local
-  time.</para>
-
-  <para><command>systemd-timedated</command> reads <filename>/etc/adjtime</filename>,
-  and depending on the contents of the file, it sets the clock to either UTC or
-  local time.</para>
-
-  <para>Create the <filename>/etc/adjtime</filename> file with the following contents
-  if your hardware clock is set to local time:</para>
+  time.</para-->
+  <para>如果您不确定您的硬件时钟是否设置为 UTC ，运行
+	  <userinput>hwclock --localtime --show</userinput> 命令，
+	  它会显示硬件时钟给出的当前时间。如果这个时间和您的手表显示的一致，
+	  则说明硬件时钟被设定为本地时间。相反，如果 <command>hwclock</command>
+	  输出的时间不是本地时间，则硬件时钟很可能被设定为 UTC 时间。
+	  根据您的时区，在 <command>hwclock</command>
+	  显示的时间上加减对应的小时数，进行进一步的验证。
+	  例如，如果您现在处于莫斯科时区，即 GMT -0700 ，在本地时间上加
+	  7 小时，再进行比较。</para>
+
+  <note><title>译注</title>
+	  <para>Windows 会将硬件时钟设定为本地时间，因此如果您要同时安装
+		  Windows 和 Linux，就要将 Linux （包括 LFS 和其他发行版）
+		  配置为使用本地时间，除非能够忍受 Windows 和 Linux 显示的不同时间
+		  （必有一个是错误的）。
+	  </para>
+  </note>
+
+  <para><command>systemd-timedated</command> 读取
+  	  <filename>/etc/adjtime</filename>，
+	  并根据其内容将硬件时钟设定为 UTC 或本地时间。</para>
+
+  <para>如果您的硬件时钟设置为本地时间，以下列内容创建
+  	  <filename>/etc/adjtime</filename> 文件：</para>
 
 <screen role="nodump"><userinput>cat &gt; /etc/adjtime &lt;&lt; "EOF"
 <literal>0.0 0 0.0
@@ -42,62 +61,83 @@
 LOCAL</literal>
 EOF</userinput></screen>
 
-  <para>If <filename>/etc/adjtime</filename> isn't present at first boot,
-  <command>systemd-timedated</command> will assume that hardware clock is
-  set to UTC and adjust the file according to that.</para>
+  <para>如果 <filename>/etc/adjtime</filename> 在初次引导时不存在，
+	  <command>systemd-timedated</command> 会假设硬件时钟使用 UTC ，
+	  并据此调整该文件。</para>
 
-  <para>You can also use the <command>timedatectl</command> utility to tell
-  <command>systemd-timedated</command> if your hardware clock is set to
-  UTC or local time:</para>
+  <para>您也可以使用 <command>timedatectl</command> 工具告诉
+  <command>systemd-timedated</command> 您的硬件时钟是 UTC 还是本地时间：
+  </para>
 
 <screen role="nodump"><userinput>timedatectl set-local-rtc 1</userinput></screen>
 
-  <para><command>timedatectl</command> can also be used to change system time and
-  time zone.</para>
+  <para><command>timedatectl</command> 也能修改系统时间和时区。</para>
 
-  <para>To change your current system time, issue:</para>
+  <para>如果要修改系统时间，执行以下命令：</para>
 
 <screen role="nodump"><userinput>timedatectl set-time YYYY-MM-DD HH:MM:SS</userinput></screen>
 
-  <para>Hardware clock will also be updated accordingly.</para>
+  <para>硬件时钟也会同时被更新。</para>
 
-  <para>To change your current time zone, issue:</para>
+  <para>要修改当前时区，执行以下命令：</para>
 
 <screen role="nodump"><userinput>timedatectl set-timezone TIMEZONE</userinput></screen>
 
-  <para>You can get a list of available time zones by running:</para>
+  <para>您可以通过运行以下命令查看可用的时区列表：</para>
 
 <screen role="nodump"><userinput>timedatectl list-timezones</userinput></screen>
 
-  <note><para>Please note that the <command>timedatectl</command> command can
-  be used only on a system booted with systemd.</para></note>
+  <note><para>注意 <command>timedatectl</command> 命令只能用于
+  systemd 引导的系统。</para></note>
 
+  <note><title>译注</title>
+	  <para><command>timedatectl</command> 在 chroot 环境中无法使用，
+		  如果需要重新设定系统时间，要么在引导进入 LFS 系统后再使用
+		  <command>timedatectl</command> ，要么使用传统的
+		  <command>hwclock --set</command> 命令。系统时区可以按照
+		  <xref linkend="conf-zone"/> 中的方法设置。</para>
+  </note>
   <sect2>
-    <title>Network Time Synchronization</title>
+    <title>网络时钟同步</title>
 
-    <para>Starting with version 213, systemd ships a daemon called
+    <!--para>Starting with version 213, systemd ships a daemon called
     <command>systemd-timesyncd</command> which can be used to
-    synchronize the system time with remote NTP servers.</para>
+    synchronize the system time with remote NTP servers.</para-->
+    <para>从版本 213 开始，systemd 附带了一个名为
+		<command>systemd-timesyncd</command> 的守护进程，
+		可以用于将系统时间与远程 NTP 服务器同步。</para>
 
-    <para>The daemon is not intended as a replacement for the well
+    <!--para>The daemon is not intended as a replacement for the well
     established NTP daemon, but as a client only implementation
     of the SNTP protocol which can be used for less advanced
-    tasks and on resource limited systems.</para>
+    tasks and on resource limited systems.</para-->
+    <para>该守护进程没有被设计为替代现有的 NTP 守护进程，
+		而是一个仅仅实现了 SNTP 协议的客户端，可以被用于一些不太复杂的任务，
+		或是资源紧张的系统。</para>
 
-    <para>Starting with systemd version 216, the
+    <!--para>Starting with systemd version 216, the
     <command>systemd-timesyncd</command> daemon is enabled by
     default. If you want to disable it, issue the following
-    command:</para>
+    command:</para-->
+    <para>从 systemd 版本 216 开始，<command>systemd-timesyncd</command>
+		守护进程被默认启用。如果希望禁用它，执行以下命令：</para>
 
 <screen role="nodump"><userinput>systemctl disable systemd-timesyncd</userinput></screen>
 
-    <para>The <filename>/etc/systemd/timesyncd.conf</filename> file
-    can be used to change the NTP servers that
-    <command>systemd-timesyncd</command> synchronizes with.</para>
+    <para><filename>/etc/systemd/timesyncd.conf</filename> 文件
+    可以被用于修改 <command>systemd-timesyncd</command>
+    同步的服务器。</para>
+
+	<note><title>译注</title>
+		<para><ulink url="http://www.ntp.org.cn/pool.php"/>
+			提供了 NTP 服务器的域名和 IP 地址列表。</para>
+	</note>
 
-    <para>Please note that when system clock is set to Local Time,
+    <!--para>Please note that when system clock is set to Local Time,
     <command>systemd-timesyncd</command> won't update hardware
-    clock.</para>
+	clock.</para-->
+    <para>注意，当系统时钟设定为本地时间时，
+		<command>systemd-timesyncd</command> 不会更新硬件时钟。</para>
 
   </sect2>