Linux常用命令-tzselect

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命令

tzselect

描述

选择时区

用法

tzselect

选项

无

注意

tzselect不会更改系统时区,只是提供临时更改时区的命令
更改系统时区推荐使用timedatectl set-timezone xxx命令
控制系统时区的文件为/etc/localtime,此文件是一个软链接,链接到对应的时区文件
系统时区文件目录为/usr/share/zoneinfo/

示例

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# tzselect命令本身是一个shell脚本,读取的/usr/share/zoneinfo/这个时区目录
$ file /usr/bin/tzselect
/usr/bin/tzselect: Bourne-Again shell script, ASCII text executable
$  grep zoneinfo /usr/bin/tzselect
: ${TZDIR=/usr/share/zoneinfo}

$ 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:      Sat Feb 20 18:04:19 CST 2021.
Universal Time is now:  Sat Feb 20 10:04:19 UTC 2021.
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
# 通过以上命令输出,得到临时更改时区命令如下
$ export TZ='Asia/Shanghai'; date
Sat Feb 20 18:27:32 CST 2021

# 查看系统时区文件
$ ll /etc/localtime
lrwxrwxrwx 1 root root 35 Feb 20 18:13 /etc/localtime -> ../usr/share/zoneinfo/Asia/Shanghai
$ ls /usr/share/zoneinfo/
Africa/      CET      Etc/       Hongkong     Kwajalein    NZ-CHAT     ROC        WET
America/     Chile/   Europe/    HST          leapseconds  Pacific/    ROK        W-SU
Antarctica/  CST6CDT  GB         Iceland      Libya        Poland      Singapore  zone1970.tab
Arctic/      Cuba     GB-Eire    Indian/      MET          Portugal    Turkey     zone.tab
Asia/        EET      GMT        Iran         Mexico/      posix/      tzdata.zi  Zulu
Atlantic/    Egypt    GMT0       iso3166.tab  MST          posixrules  UCT
Australia/   Eire     GMT-0      Israel       MST7MDT      PRC         Universal
Brazil/      EST      GMT+0      Jamaica      Navajo       PST8PDT     US/
Canada/      EST5EDT  Greenwich  Japan        NZ           right/      UTC
$ ll /usr/share/zoneinfo/America/New_York
-rw-r--r--. 3 root root 3519 Nov  5 05:14 /usr/share/zoneinfo/America/New_York
# 临时更改时区,查看时间
$ export TZ='America/New_York'; date
Sat Feb 20 05:27:38 EST 2021