脚本在CentOS7上测试OK。可以直接使用。

yum -y install ntp ntpdatecp /usr/share/zoneinfo/Asia/Shanghai /etc/localtimentpdate ntp.sjtu.edu.cnhwclock -wsed -i.bak '2,$d' /etc/ntp.confcat << EOF >> /etc/ntp.confdriftfile /var/lib/ntp/driftrestrict default kod nomodify notrap nopeer noqueryrestrict -6 default kod nomodify notrap nopeer noqueryrestrict 127.0.0.1restrict -6 ::1server 0.centos.pool.ntp.orgserver 1.centos.pool.ntp.orgserver 2.centos.pool.ntp.orgserver time.asia.apple.com burst iburstserver ntp.nasa.gov burst iburstserver ntp.sjtu.edu.cn burst iburstserver clock.via.net burst iburstincludefile /etc/ntp/crypto/pwkeys /etc/ntp/keysEOFsystemctl start ntpd.servicesystemctl enable ntpd.servicentpq -pntpstat

下面是我操作的大致过程，供参考：

node2 root@node2:~# bash -x ntpd.sh

+ yum -y install ntp ntpdate

Loaded plugins: fastestmirror, langpacks

Loading mirror speeds from cached hostfile

* base: mirrors.cqu.edu.cn

* extras: mirrors.cqu.edu.cn

* updates: mirrors.bfsu.edu.cn

base | 3.6 kB 00:00:00

docker-ce-stable | 3.5 kB 00:00:00

extras | 2.9 kB 00:00:00

updates | 2.9 kB 00:00:00

Package ntp-4.2.6p5-29.el7.centos.2.x86_64 already installed and latest version

Package ntpdate-4.2.6p5-29.el7.centos.2.x86_64 already installed and latest version

Nothing to do

+ cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

+ ntpdate ntp.sjtu.edu.cn

30 Oct 16:54:09 ntpdate[23958]: the NTP socket is in use, exiting

+ hwclock -w

+ sed -i.bak '2,$d' /etc/ntp.conf

+ cat

+ systemctl start ntpd.service

+ systemctl enable ntpd.service

+ ntpq -p

remote refid st t when poll reach delay offset jitter

==============================================================================

ntp1.ams1.nl.le 130.133.1.10 2 u 40 64 3 278.831 -30.265 20.725

139.199.215.251 100.122.36.4 2 u 39 64 3 46.198 8.272 1.160

undefined.hostn 127.67.113.92 2 u 38 64 3 413.253 -88.696 52.447

*hkhkg1-ntp-002. .GPSs. 1 u 35 64 3 62.384 8.753 6.082

clock.via.net .INIT. 16 u - 64 0 0.000 0.000 0.000

+ ntpstat

synchronised to NTP server (17.253.84.253) at stratum 2

time correct to within 983 ms

polling server every 64 s

node2 root@node2:~# ntpstat

synchronised to NTP server (17.253.84.253) at stratum 2

time correct to within 983 ms

polling server every 64 s

如何确认工作OK？

node2 root@node2:~# netstat -ln|grep 123

udp 0 0 10.42.1.0:123 0.0.0.0:*

udp 0 0 172.17.0.1:123 0.0.0.0:*

udp 0 0 192.168.122.1:123 0.0.0.0:*

udp 0 0 10.211.55.6:123 0.0.0.0:*

udp 0 0 127.0.0.1:123 0.0.0.0:*

udp 0 0 0.0.0.0:123 0.0.0.0:*

udp6 0 0 fe80::69dc:5159:1d4:123 :::*

udp6 0 0 fe80::2ce8:d4ff:fe8:123 :::*

udp6 0 0 fdb2:2c26:f4e4:0:7a:123 :::*

udp6 0 0 fe80::ecee:eeff:fee:123 :::*

udp6 0 0 fe80::ecee:eeff:fee:123 :::*

udp6 0 0 fe80::ecee:eeff:fee:123 :::*

udp6 0 0 fe80::ecee:eeff:fee:123 :::*

udp6 0 0 ::1:123 :::*

udp6 0 0 :::123 :::*

node2 root@node2:~# ntpstat

synchronised to NTP server (17.253.84.253) at stratum 2

time correct to within 985 ms

polling server every 64 s

#该指令可列出NTP

服务器是否与上层联机。由上述输出结果可知，时间校正约

为985ms且每隔64秒会主动更新时间

OK

当然要更改时间源的自己可以检索下。