小知识：开启NTP服务并设置为开机启动

[root@bogon ~]# 
vi /etc/ntp.conf 
systemctl status ntpd

systemctl start ntpd
systemctl status ntpd

date

chkconfig ntpd
chkconfig ntpd on
chkconfig ntpd

ntpq -p

hwclock -r
hwclock -w

[root@bogon ~]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
-electrode.felix 176.9.157.12     3 u   33   64    1  179.026    0.568   0.589
+ntp.wdc2.us.lea 130.133.1.10     2 u   32   64    1  237.724    2.748   0.940
+2402:4e00:1800: 118.143.17.83    2 u   31   64    1   27.680  -10.005   0.781
*stratum2-1.ntp. 194.190.168.1    2 u    5   64    3  102.584   -4.463   2.379
[root@bogon ~]# 
[root@bogon ~]# hwclock -r
Fri 30 Jun 2023 03:00:42 PM CST  -0.501077 seconds
[root@bogon ~]# date
Fri Jun 30 15:11:09 CST 2023
[root@bogon ~]# hwclock -w
[root@bogon ~]# date
Fri Jun 30 15:11:16 CST 2023