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Shell Programming and Scripting

Resetting date

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# 1  
Old 07-01-2008
Resetting date
Hi there,
Is there a way i can reset the date on my unix terminal to yesterday's date?

date
Tue Jul 1 14:18:21 GMT 2008

Please let me know.
JAK
# 2  
Old 07-01-2008
Modifying TZ may work:

Code:
$ date
Tue Jul  1 14:24:33 GMT 2008
$ TZ=GMT+24
$ date
Mon Jun 30 14:24:47 GMT 2008

# 3  
Old 07-01-2008
Thanks radoulov, how about setting to a specific date not just yesterday?

Thanks again,
JAK
# 4  
Old 07-01-2008
You should read man date
# 5  
Old 07-01-2008
Quote:
[...]
how about setting to a specific date not just yesterday?
I'm not sure if you want to change the date system wide or only for the current session.
The latter seams quite difficult ...
# 6  
Old 07-01-2008
I wanted to set for current session but for now i got by just resetting to yesterday ..

Thanks for the response and kind help
JAK
# 7  
Old 07-01-2008
unix time is kept by the kernel as 'epoch' seconds elapsed since Jan 1, 1970. All of the date functions and commands reference epoch seconds. You cannot set epoch seconds for one process. You can only trick some commands into thinking you are in a weird timezone, so that you can "go" backwards/forwards as much as 24 hours. No more because the length of a day is 24 hours. And you are not changing epoch seconds, just how they are interpreted.
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