一、引言

买了个国外的服务器，时区默认是UTC ，和我们用的时间不一样，这样就不太方便了。

所以要改成中国的时区，中国的时区是UTC+8 ，也叫CST 。

二、方法

1. 设置系统时区

使用tzselect  命令，依次选择5（Asia） 、9（China） 、1（Beijing Time） 、1（Yes） 。

[root@shadowsocks supervisor]# 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 Oct 21 13:57:38 CST 2017.
Universal Time is now:  Sat Oct 21 05:57:38 UTC 2017.
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

2. 覆盖系统时区文件

cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

然后查看时间是否准确：

[root@shadowsocks ~]# date
Sat Oct 21 14:11:48 CST 2017