Linux Time Synchronization Service

Recently the company's server time has been inaccurate, looked for several times the server, after testing Shanghai Jiaotong University's still count, address:

ntp.sjtu.edu.cn (Shanghai Jiaotong University Network Center NTP server address)

202.120.2.101 (Shanghai Jiaotong University Network Center NTP server address)

So through the crontab do timed tasks, let every 5 minutes synchronization time:

[Email protected] ~]# crontab-l

Ten * * * */usr/sbin/ntpdate-u ntp.sjtu.edu.cn

[Email protected] ~]#

Other time Sync server address here to collect some, in case of emergency just

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

This article from "Flat Light is true" blog, please be sure to keep this source http://ucode.blog.51cto.com/10837891/1890632

Linux Time Synchronization Service