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docs/linux/ops/ntp.md
@@ -148,7 +148,7 @@ $ ntpdate cn.pool.ntp.org
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示例:执行如下命令,就可以在每天凌晨 3 点同步系统时间:
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```shell
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-echo "* 3 * * * /usr/sbin/ntpdate cn.pool.ntp.org" >> /etc/crontab # 修改 crond 服务配置
+echo "0 3 * * * /usr/sbin/ntpdate cn.pool.ntp.org" >> /etc/crontab # 修改 crond 服务配置
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systemctl restart crond # 重启 crond 服务以生效
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```
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