本文主要向大家介绍了Linux运维知识之调整Linux操作系统时区-centos7，通过具体的内容向大家展现，希望对大家学习Linux运维知识有所帮助。

如果你的 Linux 系统时区配置不正确，必需要手动调整到正确的当地时区。NTP 对时间的同步处理只计算当地时间与 UTC 时间的偏移量，因此配置一个 NTP 对时间进行同步并不能解决时区不正确的问题。所以大家在用了国外云计算服务商如 Microsoft Azure 或其它 VPS、虚拟机时，需要注意是否与中国大陆的时区一致

[root@localhost yum.repos.d]# date
Sun Mar 25 21:39:46 EDT 2018
[root@localhost yum.repos.d]# ls -l /etc/localtime
lrwxrwxrwx. 1 root root 38 Jan  2 13:22 /etc/localtime -> ../usr/share/zoneinfo/America/New_York
[root@localhost yum.repos.d]# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
 1) Africa
 2) Americas
 3) Antarctica
 4) Arctic Ocean
 5) Asia
 6) Atlantic Ocean
 7) Australia
 8) Europe
 9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
#? 5
Please select a country.
 1) Afghanistan           18) Israel                35) Palestine
 2) Armenia               19) Japan                 36) Philippines
 3) Azerbaijan            20) Jordan                37) Qatar
 4) Bahrain               21) Kazakhstan            38) Russia
 5) Bangladesh            22) Korea (North)         39) Saudi Arabia
 6) Bhutan                23) Korea (South)         40) Singapore
 7) Brunei                24) Kuwait                41) Sri Lanka
 8) Cambodia              25) Kyrgyzstan            42) Syria
 9) China                 26) Laos                  43) Taiwan
10) Cyprus                27) Lebanon               44) Tajikistan
11) East Timor            28) Macau                 45) Thailand
12) Georgia               29) Malaysia              46) Turkmenistan
13) Hong Kong             30) Mongolia              47) United Arab Emirates
14) India                 31) Myanmar (Burma)       48) Uzbekistan
15) Indonesia             32) Nepal                 49) Vietnam
16) Iran                  33) Oman                  50) Yemen
17) Iraq                  34) Pakistan
#? 9
Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time
#? 1

The following information has been given:

        China
        Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Local time is now:      Mon Mar 26 09:40:44 CST 2018.
Universal Time is now:  Mon Mar 26 01:40:44 UTC 2018.
Is the above information OK?
1) Yes
2) No
#? 1

You can make this change permanent for yourself by appending the line
        TZ='Asia/Shanghai'; export TZ
to the file '.profile' in your home directory; then log out and log in again.

Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Shanghai
[root@localhost yum.repos.d]# timedatectl
      Local time: Sun 2018-03-25 21:44:17 EDT
  Universal time: Mon 2018-03-26 01:44:17 UTC
        RTC time: Mon 2018-03-26 01:44:16
       Time zone: America/New_York (EDT, -0400)
     NTP enabled: yes
NTP synchronized: yes
 RTC in local TZ: no
      DST active: yes
 Last DST change: DST began at
                  Sun 2018-03-11 01:59:59 EST
                  Sun 2018-03-11 03:00:00 EDT
 Next DST change: DST ends (the clock jumps one hour backwards) at
                  Sun 2018-11-04 01:59:59 EDT
                  Sun 2018-11-04 01:00:00 EST
[root@localhost yum.repos.d]# timedatectl set-timezone 'Asia/Shanghai'
[root@localhost yum.repos.d]# timedatectl
      Local time: Mon 2018-03-26 09:45:34 CST
  Universal time: Mon 2018-03-26 01:45:34 UTC
        RTC time: Mon 2018-03-26 01:45:34
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: yes
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a

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