2020-08-20 15:36:07 +08:00
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# NTP 同步网络时间
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Linux 使用 NTP 协议进行网络时间同步。使用 ntpdate 命令可进行网络时间同步。
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## 1.安装
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首先需要安装 NTP 协议和相关工具。
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```bash
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# Manjaro
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pacman -S ntp
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```
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## 2.同步网络时间
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```bash
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# 同步网络时间
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ntpdate 0.cn.pool.ntp.org
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# 将系统时钟写到硬件中
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hwclock -w
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```
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## 3.服务器列表
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一级服务器列表：<http://support.ntp.org/bin/view/Servers/StratumOneTimeServers>
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二级服务器列表：<http://support.ntp.org/bin/view/Servers/StratumTwoTimeServers>
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清华大学：ntp.tuna.tsinghua.edu.cn
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微软：time.windows.com
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## 4.设置每日自动更新
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Alternatively, enable ntpdate.service to synchronize time once (option -q) and non-forking (option -n) per boot.
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```bash
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systemctl enable ntpdate.service
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systemctl start ntpdate.service
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```
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如果需要同步时间到 hardware clock，则需要在 start ntpdate.service 之前创建并编辑 /etc/systemd/system/ntpdate.service.d/hwclock.conf，内容如下：
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```bash
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[Service]
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ExecStart=/usr/bin/hwclock -w
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```
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## 5.内部参考关键字
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2020-09-28 16:48:24 +08:00
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1. Linux
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2. 时间管理
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