2019-02-22 18:57:46 +08:00
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#!/usr/bin/env bash
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###################################################################################
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# 使用 NTP 进行时间同步
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# 参考：https://www.cnblogs.com/quchunhui/p/7658853.html
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2019-05-07 14:29:16 +08:00
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# @author: Zhang Peng
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2019-02-22 18:57:46 +08:00
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###################################################################################
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echo -e "\n>>>>>>>>> 设置 ntp"
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echo -e "先安装时钟同步工具 ntp"
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yum -y install ntp
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ip=$(ip addr | awk '/^[0-9]+: / {}; /inet.*global/ {print gensub(/(.*)\/(.*)/, "\\1", "g", $2)}')
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/sbin/iptables -A INPUT -p UDP -i eth0 -s ${ip}/24 --dport 123 -j ACCEPT
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echo -e "启动 NTP 服务"
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systemctl start ntpd.service
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echo -e "立即执行时间同步"
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/usr/sbin/ntpdate ntp.sjtu.edu.cn
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echo -e "自动定时同步时间"
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echo "* 3 * * * /usr/sbin/ntpdate ntp.sjtu.edu.cn" >> /etc/crontab
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systemctl restart crond.service
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echo -e "同步后系统时间："
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date
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