linux system time to get started quickly

timedatectl ---> management system time
set-time ---> set the current time

status ---> displays the current time information

set-timezone ---> set to the current time zone

set-local-rtc 0 | 1 ---> Sets whether to use utc time

list-timezone ---> View supports all time zones

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chronyd ---> Time Synchronization Service

Server:
Vim /etc/chrony.conf
22 is the allow 172.25.254.0/24 ---> allowing those native client to synchronize time
29 local stratum 10 ---> when the unit is not synchronized into any host, native as a time source

Restart Time Synchronization Service

Client:
vim /etc/chrony.conf
Server iBurst ## 172.25.254.200 172.25.254.131 host this machine immediately synchronized time

chronyc sources -v synchronization time

^ * foundation200.ilt.example indicate success set the synchronization time