Linux-Redhat系统更改系统时区

[root@localhost ~]# date   				#查看本地时间
Thu May 19 23:41:32 EDT 2022
[root@localhost ~]# hwclock --show		#查看硬件时间
Thu 19 May 2022 11:42:07 PM EDT  -0.332325 seconds

当前系统版本：
Red Hat Enterprise Linux Server release 7.0 (Maipo)

查看目前的时区：

[root@localhost ~]# timedatectl
      Local time: Thu 2022-05-19 23:48:45 EDT		#本地时间
  Universal time: Fri 2022-05-20 03:48:45 UTC
        RTC time: Fri 2022-05-20 03:48:45
        Timezone: America/New_York (EDT, -0400)		#现在系统的时区
     NTP enabled: yes
NTP synchronized: yes
 RTC in local TZ: no
      DST active: yes
 Last DST change: DST began at
                  Sun 2022-03-13 01:59:59 EST
                  Sun 2022-03-13 03:00:00 EDT
 Next DST change: DST ends (the clock jumps one hour backwards) at
                  Sun 2022-11-06 01:59:59 EDT
                  Sun 2022-11-06 01:00:00 EST

修改时区为上海：

[root@localhost ~]# timedatectl set-timezone Asia/Shanghai

修改后再次查看：

[root@localhost ~]# timedatectl
      Local time: Fri 2022-05-20 11:49:17 CST	#修改后的本地时间
  Universal time: Fri 2022-05-20 03:49:17 UTC
        RTC time: Fri 2022-05-20 03:49:17
        Timezone: Asia/Shanghai (CST, +0800)	#修改后的时区
     NTP enabled: yes
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a
[root@localhost ~]# date						#当前系统时间
Fri May 20 11:49:21 CST 2022
[root@localhost ~]# hwclock --show				#当前系统硬件时间
Fri 20 May 2022 11:49:29 AM CST  -0.924897 seconds