内网有一台Rocky Linux8.4的服务器，想设置时间同步，发现ntpdate不能用，经查，可使用chrony模块来实现。

查看系统版本

[root@SVN ~]# cat /etc/redhat-release
Rocky Linux release 8.4 (Green Obsidian)

修改chrony配置文件

vim /etc/chrony.conf

• 因为我这边有内网NTP服务器192.168.1.120，所我就改成下面这样

[root@SVN ~]# cat /etc/chrony.conf | grep -Ev '^$|#'
server 192.168.1.120 iburst
server ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony

重启服务

systemctl restart chronyd.service

同步

[root@SVN ~]# 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
===============================================================================
^* 192.168.1.120                 2   6    17     3  +3788ns[  +47us] +/-  134ms
[root@SVN ~]# date
2022年 06月 07日 星期二 09:13:55 CST