centos离线安装chrony
<h1>环境</h1><p>CentOS Linux release 7.9.2009 (Core)</p>
<h1>工具</h1>
<p>chrony 下载地址：https://chrony-project.org/download.html</p>
<h1>安装步骤</h1>
<h2>删除原chrony</h2>
<pre class="language-bash highlighter-hljs"><code>yum remove -y chrony</code></pre>
<p>如果之前是编译安装的可以选择不删除，在安装时把旧版本覆盖掉。</p>
<p>如果没有，可以直接跳过。</p>
<h2>安装chrony</h2>
<pre class="language-bash highlighter-hljs"><code>#解压
# tar zxvf chrony-2.2.1.tar.gz
# cd chrony-2.2.1
#编译安装
# ./configure --prefix=/usr
# make
# make install
#查看版本
# chronyd -v
chronyd (chrony) version 2.2.1 (+CMDMON +NTP +REFCLOCK +RTC -PRIVDROP -SCFILTER +SECHASH +ASYNCDNS +IPV6 -DEBUG)
#部署配置文件和服务控制脚本
# cp examples/chrony.conf.example2 /etc/chrony.conf
# cp examples/chrony*.service /usr/lib/systemd/system/
# ls /usr/lib/systemd/system/chrony*.service
/usr/lib/systemd/system/chronyd.service/usr/lib/systemd/system/chrony-wait.service
#启动服务
# systemctl start chronyd.service
#加入开机自启
# systemctl enable chronyd.service
#检查服务状态
# systemctl status chronyd.service</code></pre>
<h2>配置chrony</h2>
<pre class="language-bash highlighter-hljs"><code># vim /etc/chrony.conf
#编辑该行，设置ntp服务器地址，pool.ntp.org 替换为ntp服务器地址，注：保留1个即可，其他NTP服务器地址注销
pool pool.ntp.org iburst
#重启chrony
# systemctl restart chronyd.service</code></pre>
<h2>查看状态</h2>
<p>重启后等几分钟，让系统识别到时间服务器，期间可多次执行<code>chronyc sources</code>或<code>chronyc sources -v</code>查询状态</p>
<pre class="language-bash highlighter-hljs"><code># chronyc sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 192.168.6.202 2 6 37 60 -50us[ +603us] +/- 1329us</code></pre>
<p>^*表示当前同步的服务器</p>
<p> end.</p><br><br>
来源：https://www.cnblogs.com/xujiecnblogs/p/17222449.html
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