linux（centOS）调整时区（PDT修改为CST）

命令：tzselect

按照顺序依次输入5,9,1,1

[root@master conf]# tzselect -select a time zone
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    ------这里选5  亚洲


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    -------这里选9   中国


Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time


#? 1    这里选1    北京
 

The following information has been given:

    China
    Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Local time is now:    Wed Aug 21 15:46:45 CST 2019.
Universal Time is now:    Wed Aug 21 07:46:45 UTC 2019.
Is the above information OK?
1) Yes
2) No


#? 1     这里选1   yes确认保存


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@master conf]# date
Wed Aug 21 00:47:06 PDT 2019

改到这里此时时区还是PDT，需要修改profile文件

[root@master conf]# vim /etc/profile
 # time 
 TZ='Asia/Shanghai'
 export TZ
[root@master conf]# source /etc/profile

此时时区已经变为CST

[root@master conf]# date
Wed Aug 21 15:47:46 CST 2019