擼了今年阿里、頭條和美團的面試，我有一個重要發現.......>>>

使用示例

示例一 將時區更改為北京

[root@new55 ~]#?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) east China - Beijing, Guangdong, Shanghai, etc.
2) Heilongjiang (except Mohe), Jilin
3) central China - Sichuan, Yunnan, Guangxi, Shaanxi, Guizhou, etc.
4) most of Tibet & Xinjiang
5) west Tibet & Xinjiang
#??1?

The following information has been given:

??????? China
??????? east China - Beijing, Guangdong, Shanghai, etc.

Therefore TZ='Asia/Shanghai' will be used.
Local time is now:????? Mon Dec? 6 09:40:35 CST 2010.
Universal Time is now:? Mon Dec? 6 01:40:35 UTC 2010.
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@new55 ~]#

現在要做的事情就是按照提示，把　?TZ='Asia/Shanghai'; export TZ?　　添加到.profile中（bash對應加到.bash_profile）

總結

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