参考文献
https://docs.fedoraproject.org/en-US/Fedora/18/html/System_Administrators_Guide/sect-Checking_if_chrony_is_synchronized.html
安装
yum install -y chrony
修改配置文件
cp /etc/chrony.conf /etc/chrony.conf.bak
sed -i '/^server/d' /etc/chrony.conf
sed -i '2a server ntp1.aliyun.com' /etc/chrony.conf
sed -i '2a server ntp2.aliyun.com' /etc/chrony.conf
sed -i '2a server ntp3.aliyun.com iburst\nallow 10/8' /etc/chrony.conf
启动服务
systemctl start chronyd && systemctl enable chronyd
设置时区
timedatectl set-timezone Asia/Shanghai
查看时间源
[root@ntp ~]# chronyc sources -v
210 Number of sources = 2
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current synced, '+' = combined , '-' = not combined,
| / '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 203.107.6.88 2 6 17 38 -883us[-2553us] +/- 20ms
^? 120.25.115.20 2 6 1 44 +624us[-3946ms] +/- 25ms
强制更新时间
chronyc -a makestep
END
