chrony時間同步服務配置

1.安裝服務（一般伺服器都預設安裝了的）

[root@disasterproofapp ~]# yum install -y chrony

2.修改時間同步配置檔案

[root@disasterproofapp ~]# vi /etc/chrony.conf

#server 0.centos.pool.ntp.org iburst --注釋這行
#server 1.centos.pool.ntp.org iburst --注釋這行
#server 2.centos.pool.ntp.org iburst --注釋這行
server ntp.ntsc.ac.cn  iburst    --添加這行，表示與本機同步時間(視情況自行更改)
           

3.啟動服務

[root@disasterproofapp ~]# systemctl restart chronyd

4.開機自啟

[root@disasterproofapp ~]# systemctl enable chronyd

5.手動測試同步

[root@disasterproofapp ~]# chronyc sources -v

210 Number of sources = 1

.-- 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

6.檢視時間是否正常