Linux time synchronization + common NTP server address in China

Time synchronization is important when the Linux service needs time-stamping. Here is a synchronization command that I used recently.

ntpdate

My virtual machine is CentOS, install Ntpdate

install ntpdate

And then
Select the NTP server in Shanghai Jiaotong University to synchronize

ntpdate ntp.sjtu.edu.cn

Commonly used NTP addresses in China
Address transferred from watercress (http://www.douban.com/note/171309770/)

210.72.145.44 (National Timing Center Server IP address)
133.100.11.8 Japan Fukuoka University
Time-a.nist.gov 129.6.15.28 NIST, Gaithersburg, Maryland
Time-b.nist.gov 129.6.15.29 NIST, Gaithersburg, Maryland
Time-a.timefreq.bldrdoc.gov 132.163.4.101 NIST, Boulder, Colorado
Time-b.timefreq.bldrdoc.gov 132.163.4.102 NIST, Boulder, Colorado
Time-c.timefreq.bldrdoc.gov 132.163.4.103 NIST, Boulder, Colorado
utcnist.colorado.edu 128.138.140.44 University of Colorado, Boulder
Time.nist.gov 192.43.244.18 NCAR, Boulder, Colorado
Time-nw.nist.gov 131.107.1.10 Microsoft, Redmond, Washington
Nist1.symmetricom.com 69.25.96.13 symmetricom, San Jose, California
Nist1-dc.glassey.com 216.200.93.8 abovenet, Virginia
Nist1-ny.glassey.com 208.184.49.9 abovenet, New York City
Nist1-sj.glassey.com 207.126.98.204 abovenet, San Jose, California
Nist1.aol-ca.truetime.com 207.200.81.113 TrueTime, AOL facility, Sunnyvale, California
Nist1.aol-va.truetime.com 64.236.96.53 TrueTime, AOL facility, Virginia
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ntp.sjtu.edu.cn 202.120.2.101 (Shanghai Jiaotong University Network Center NTP server address)
S1a.time.edu.cn Posts and Telecommunications
S1b.time.edu.cn Tsinghua University
S1c.time.edu.cn Peking University
s1d.time.edu.cn Southeast University
S1e.time.edu.cn Tsinghua University
S2a.time.edu.cn Tsinghua University
S2b.time.edu.cn Tsinghua University
S2c.time.edu.cn Posts and Telecommunications
s2d.time.edu.cn Southwest Network Center
s2e.time.edu.cn Northwest Network Center
s2f.time.edu.cn Northeast Regional Network Center
s2g.time.edu.cn East China South Area Network Center
s2h.time.edu.cn Sichuan University Network Management Center
s2j.time.edu.cn Dalian University of Computer Network Center
s2k.time.edu.cn cernet Guilin Master Node
S2m.time.edu.cn Peking University

Linux time synchronization + common NTP server address in China