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root@Chainedbox:~# tzselect
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Please identify a location so that time zone rules can be set correctly.
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Please select a continent, ocean, "coord", or "TZ".
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1) Africa                                                            7) Europe
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2) Americas                                                          8) Indian Ocean
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3) Antarctica                                                        9) Pacific Ocean
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4) Asia                                                             10) coord - I want to use geographical coordinates.
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5) Atlantic Ocean                                                   11) TZ - I want to specify the timezone using the Posix TZ format.
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6) Australia
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#? 4
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Please select a country whose clocks agree with yours.
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1) Afghanistan            10) Cyprus                19) Japan                 28) Macau                 37) Qatar                 46) Turkmenistan
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2) Armenia                11) East Timor            20) Jordan                29) Malaysia              38) Russia                47) United Arab Emirates
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3) Azerbaijan             12) Georgia               21) Kazakhstan            30) Mongolia              39) Saudi Arabia          48) Uzbekistan
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4) Bahrain                13) Hong Kong             22) Korea (North)         31) Myanmar (Burma)       40) Singapore             49) Vietnam
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5) Bangladesh             14) India                 23) Korea (South)         32) Nepal                 41) Sri Lanka             50) Yemen
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6) Bhutan                 15) Indonesia             24) Kuwait                33) Oman                  42) Syria
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7) Brunei                 16) Iran                  25) Kyrgyzstan            34) Pakistan              43) Taiwan
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8) Cambodia               17) Iraq                  26) Laos                  35) Palestine             44) Tajikistan
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9) China                  18) Israel                27) Lebanon               36) Philippines           45) Thailand
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#? 9
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Please select one of the following timezones.
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1) Beijing Time
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2) Xinjiang Time
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#? 1
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The following information has been given:
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        China
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        Beijing Time
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Therefore TZ='Asia/Shanghai' will be used.
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Selected time is now:   Sun Oct 24 11:11:56 CST 2021.
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Universal Time is now:  Sun Oct 24 03:11:56 UTC 2021.
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Is the above information OK?
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1) Yes
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2) No
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#? 1
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You can make this change permanent for yourself by appending the line
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        TZ='Asia/Shanghai'; export TZ
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to the file '.profile' in your home directory; then log out and log in again.
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Here is that TZ value again, this time on standard output so that you
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can use the /usr/bin/tzselect command in shell scripts:
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Asia/Shanghai
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root@Chainedbox:~#