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* Description: Knowledge of changing timezone on Linux platform
* Date: 11:36 PM EST, 01/16/2018
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<1> On some Linux distributions (for example, CentOS), the timezone is controlled by /etc/localtime file:
     |
     |__ $ date 

                 Wed Jan 10 22:43:07 UTC 2018 on pts/0



				 
				 
<2> All US timezones are located under under the /usr/share/zoneinfo/US directory:
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     |__ $ ls /usr/share/zoneinfo/US/	

                 Alaska       Arizona     Eastern         Hawaii              Michigan        Pacific
                 Aleutian     Central     East-Indiana    Indiana-Starke      Mountain        Samoa

	 

				 
				 
<3> Remove or cp /etc/localtime to a different name:
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     |__ $ mv /etc/localtime /etc/localtime_bkp	 
				 
				 


				 
<4> To change the timezone, link the target timezone file from /usr/share/zoneinfo/US/ to the /etc/localtime directory as OS root user:
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     |__ $ ln -s /usr/share/zoneinfo/US/Eastern /etc/localtime	 
     |
     |__ $ date
	 
                 Tue Jan 16 23:44:28 EST 2018