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Top Forums Shell Programming and Scripting Date One Week Ago From Given Date, Not From Current Date Post 302470226 by Donkey25 on Tuesday 9th of November 2010 01:34:00 PM
Old 11-09-2010
Date One Week Ago From Given Date, Not From Current Date

Hi all,

I've used various scripts in the past to work out the date last week from the current date, however I now have a need to work out the date 1 week from a given date.

So for example, if I have a date of the 23rd July 2010, I would like a script that can work out that one week back was the 16th of July 2010.

Can anybody help?

I normally use something like this in perl

Code:
use Time::Local;
$back_time = (time() - (1*86400));

Is there a way to replace time() which is the current date with any date I choose?

Thanks in advance!
 

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PMDATE(1)						      General Commands Manual							 PMDATE(1)

NAME
pmdate - display an offset date SYNOPSIS
pmdate [ offset ... ] format DESCRIPTION
pmdate displays the current date and/or time, with an optional offset. An offset is specified with a leading sign (``+'' or ``-''), followed by an integer value, followed by one of the following ``scale'' spec- ifiers; S seconds M minutes H hours d days m months y years The output format follows the same rules as for date(1) and strftime(3). For example, the following will display the date a week ago as DDMMYYYY; pmdate -7d %d%m%Y PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura- tion file, as described in pcp.conf(5). SEE ALSO
date(1), strftime(3), pcp.conf(5) and pcp.env(5). Performance Co-Pilot PCP PMDATE(1)
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