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.
 ) Africa
 ) Americas
 ) Antarctica
 ) Arctic Ocean
 ) Asia
 ) Atlantic Ocean
 ) Australia
 ) Europe
 ) Indian Ocean
) Pacific Ocean
) none - I want to specify the time zone using the Posix TZ format.
#?
Please select a country.
 ) Afghanistan          ) Israel            ) Palestine
 ) Armenia          ) Japan            ) Philippines
 ) Azerbaijan          ) Jordan            ) Qatar
 ) Bahrain          ) Kazakhstan        ) Russia
 ) Bangladesh          ) Korea (North)        ) Saudi Arabia
 ) Bhutan          ) Korea (South)        ) Singapore
 ) Brunei              ) Kuwait            ) Sri Lanka
 ) Cambodia          ) Kyrgyzstan        ) Syria
 ) China          ) Laos            ) Taiwan
) Cyprus          ) Lebanon            ) Tajikistan
) East Timor          ) Macau            ) Thailand
) Georgia          ) Malaysia              ) Turkmenistan
) Hong Kong          ) Mongolia            ) United Arab Emirates
) India          ) Myanmar (Burma)       ) Uzbekistan
) Indonesia          ) Nepal            ) Vietnam
) Iran          ) Oman            ) Yemen
) Iraq          ) Pakistan
#? 

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  :: CST 

您还可以使用 timedatectl status 命令检查详细状态。

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