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Full Discussion: Changing TZ from a script
Top Forums UNIX for Dummies Questions & Answers Changing TZ from a script Post 302876362 by Scott on Saturday 23rd of November 2013 11:19:06 AM
Old 11-23-2013
You could put the code into a function, in a script and source that script (or put the function into one of your login scripts, and it will be source automatically during login).

Code:
settz() {
  printf "Enter timezone (Asia, or GMT) [GMT]: "
  read Time
  unset TZ
  case "$Time" in
    Asia)
      export TZ="Asia/Kolkata"
      ;;
    ?*)
      echo "Unknown Time Zone"
      ;;
  esac
}

Code:
$ settz
Enter timezone (Asia, or GMT) [GMT]: 
$
$ echo $TZ
$
$
$ settz
Enter timezone (Asia, or GMT) [GMT]: Asia
$
$ echo $TZ
Asia/Kolkata
$

 

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GEOIP_TIME_ZONE_BY_COUNTRY_AND_REGION(3)				 1				  GEOIP_TIME_ZONE_BY_COUNTRY_AND_REGION(3)

geoip_time_zone_by_country_and_region - Returns the time zone for some country and region code combo

SYNOPSIS
string geoip_time_zone_by_country_and_region (string $country_code, [string $region_code]) DESCRIPTION
The geoip_time_zone_by_country_and_region(3) function will return the time zone corresponding to a country and region code combo. In the United States, the region code corresponds to the two-letter abbreviation of each state. In Canada, the region code corresponds to the two-letter province or territory code as attributed by Canada Post. For the rest of the world, GeoIP uses FIPS 10-4 codes to represent regions. You can check http://www.maxmind.com/app/fips10_4 for a detailed list of FIPS 10-4 codes. This function is always available if using GeoIP Library version 1.4.1 or newer. The data is taken directly from the GeoIP Library and not from any database. PARAMETERS
o $country_code - The two-letter country code (see geoip_country_code_by_name(3)) o $region_code - The two-letter (or digit) region code (see geoip_region_by_name(3)) RETURN VALUES
Returns the time zone on success, or FALSE if the country and region code combo cannot be found. EXAMPLES
Example #1 A geoip_time_zone_by_country_and_region(3) example using region code for US/Canada This will print the time zone for country CA (Canada), region QC (Quebec). <?php $timezone = geoip_time_zone_by_country_and_region('CA', 'QC'); if ($timezone) { echo 'Time zone for CA/QC is: ' . $timezone; } ?> The above example will output: Time zone for CA/QC is: America/Montreal Example #2 A geoip_time_zone_by_country_and_region(3) example using FIPS codes This will print the time zone for country JP (Japan), region 01 (Aichi). <?php $timezone = geoip_time_zone_by_country_and_region('JP', '01'); if ($timezone) { echo 'Time zone for JP/01 is: ' . $timezone; } ?> The above example will output: Time zone for JP/01 is: Asia/Tokyo PHP Documentation Group GEOIP_TIME_ZONE_BY_COUNTRY_AND_REGION(3)
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