How to configure timezone in a linux box.

1.Preserve current configuration file if required.

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# cp  /etc/localtime   /etc/localtime.org

2.Create a link to IST timezone file (/usr/share/zoneinfo/Asia/Calcutta) or copy /usr/share/zoneinfo/Asia/Calcutta  as /etc/localtime.

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# ln  -s   /usr/share/zoneinfo/Asia/Calcutta   /etc/localtime

Test our new configuration.

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[linuxbox~]$ date

Tue Feb 28 12:07:38 IST 2012