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
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
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: Tue Mar 20 14:05:28 CST 2018. Universal Time is now: Tue Mar 20 06:05:28 UTC 2018. 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
程序结束，我们执行date -R发现，时区并没有变化。
那就奇怪了，tzselect命令是用于干嘛的呢？那我执行man tzselect再看看。
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DESCRIPTION This manual page explains how you can use the tzselect utility to view the installed timezone. It comes handy when you want to know what time it is in other countries, or if you just wonder what timezones exist.
tzselect is called without any parameters from the shell. It shows a list of about one dozen geographic areas one can roughly recog‐ nize as continents. After choosing a geographic area by number, a list of countries and cities in this area will be shown.
You can press the Enter key to reprint the list. To choose a timezone, just press the number left to it. If your input is invalid, the list will be reprinted.
You may press Ctrl-C to interrupt the script at any time.
Note that tzselect will not actually change the timezone for you. Use 'dpkg-reconfigure tzdata' to achieve this.
