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Make the system Time Zone persistent across REBOOT in Linux

Hi Guys!
Are tou tired of fixing the Time Zone across reboot in your Linux box..?  Here are three simple steps for you to fix the issue.
In this example we are fixing the time zone to IST. Similarly you can set it to any Time Zone of your choice.

Step:1 Set the hardware clock to IST time zone
# ln -sf /usr/share/zoneinfo/Asia/Calcutta /etc/localtime

Step:2 Verify the hardware clock is set to IST properly
# hwclock --show

Step:3 Verify the date and time also if necessary
# date

What if the system time is wrong..? Then follow Steps 4 to 7

Step;4 Correct system time
# date -s "Tue 26 Apr 2016 19:36:00"

Step:5 Sync system time to hardware clock time
# hwclock --systohc --localtime

Step:6 Verify hardware clock time
# hwclock --show

Step:7 Verify system time
# date

Result of Step:6 & 7 must be same.

Thank You!
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