linux修改时区设置

因为在linux服务器上搭建了jenkins并设置了定时编译，发现时间总是跟设置不一样，看了一下是服务器上时区

# date -R
Fri, 10 May 2019 06:51:33 +0000

我们是东八区，所以相应改了一下设置：使用tzselect设置时区为亚洲-中国-北京时间
选择时区

# tzselect   
Please identify a location so that time zone rules can be set correctly.
Please select a continent, ocean, "coord", or "TZ".
 1) Africa
 2) Americas
 3) Antarctica
 4) Asia
 5) Atlantic Ocean
 6) Australia
 7) Europe
 8) Indian Ocean
 9) Pacific Ocean
10) coord - I want to use geographical coordinates.
11) TZ - I want to specify the time zone using the Posix TZ format.
#? 4               //选择Asia
Please select a country whose clocks agree with yours.
 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         //选择China
Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time
#? 1        //选择北京时间

The following information has been given:

        China
        Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Selected time is now:   Fri May 10 14:52:33 CST 2019.
Universal Time is now:  Fri May 10 06:52:33 UTC 2019.
Is the above information OK?
1) Yes
2) No
#? 1          //确认信息

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

设置完成后在/usr/share/zoneinfo下会多一个亚洲上海的时间文件（/usr/share/zoneinfo这个目录下面就是存放不同时区格式的时间文件的），只设置完成还不能改变本机的时间设置，我们还需要执行以下命令，可以将本机时间调整至目标时区的时间格式
修改本机时间

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

这样就OK啦，最后查看一下

# date -R
Fri, 10 May 2019 14:54:42 +0800