2、设置TZ环境变量的值
环境变量大家应该不陌生，时区也是有它自己的环境变量值的，并且很多程序和命令都要调用这个变量的值。这里我们通过tzselect命令来教大家如何设置TZ环境变量的值。本例以上海时间为例。
[root@c64-client ~]# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean. #这里让你选择一个大陆或海洋
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. #接下来让你选择一个国家或者城市
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. #现在让你从以下时间区区域中做出选择。
1) east China - Beijing, Guangdong, Shanghai, etc. #因为我们要选择上海时区，所以选择这个。
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: Sat Nov 2 20:52:38 CST 2013.
Universal Time is now: Sat Nov 2 12:52:38 UTC 2013.
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 #它会在这里生成你更改这个环境变量的命令，下面执行这个命令即可更改时区
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@c64-client ~]# TZ='Asia/Shanghai'; export TZ
[root@c64-client ~]# date
Sat Nov 2 20:52:49 CST 2013 #可以看到我们的时间已经更改为了上海时间
我们知道如何设置linux的时区后，下面就是计算机的时间问题了。