CentOS / RHEL 7 更改时区

timedatectl 是 RHEL7 上的一项新功能。它可用于查询和更改系统时钟及其设置。

按照以下步骤将时区更改为中国。（以root用户身份执行以下命令）。

1.使用以下命令列出所有可用的时区。你将使用此命令获得一长串时区。

# timedatectl list-timezones
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
....

2.找到中国时区中所需的正确时区并设置特定时区。有一个名为 tzselect 的命令可以帮助您找到所需的时区。例如，要在中国查找时区，请按如下所示使用它：

# 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: Thu Aug 22 16:57:30 CST 2019.
  Universal Time is now: Thu Aug 22 08:57:30 UTC 2019.
  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

# timedatectl set-timezone Asia/Kolkata

3. 运行 “date” 命令查看时间是否正确

# date
Thu Aug 22 17:04:39 CST 2019

您还可以使用 timedatectl status 命令检查详细状态。

# timedatectl status
      Local time: Thu 2019-08-22 17:05:14 CST
  Universal time: Thu 2019-08-22 09:05:14 UTC
        RTC time: Thu 2019-08-22 09:05:14
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: yes
NTP synchronized: no
 RTC in local TZ: no
      DST active: n/a