Linux-based public NTP server

NTP server: Network time Protocol (NTP) is a protocol used to synchronize the timing of a computer, which allows the computer to synchronize its servers or clock sources (such as quartz clocks, GPS, etc.) It provides high-precision time correction (less than 1 milliseconds on LAN versus standard, dozens of MS on WAN) and can be referred to as a cryptographic acknowledgment to prevent malicious protocol attacks.

1. Reliable Public NTP server address: http://www.ntp.org.cn/index.html

China cn.ntp.org.cn

2. Synchronization method:

Temporary sync: ntpdate cn.ntp.org.cn

Long-term sync: echo "ntpdate cn.ntp.org.cn" >>/etc/cron.daily/timeupdate

Or add crontab task, */5 * * * */usr/sbin/ntpdate ntpdate cn.ntp.org.cn

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Linux-based public NTP server