TECH SOLUTIONS

Here the requirement is that I provide a date in some format for example (yyyy-mm-dd) and script should give me date of previous day of given date i.e if I provide "Date" , I should get (Date-1). Take a look at following script:

#!/bin/bash

scheduled_date=2011-08-07  # format is yyyy-mm-dd

datevalue=`date -ud $scheduled_date "+%s"`

datevalue=$(($datevalue-86400))

outdate=`date [email protected]$datevalue "+%Y-%m-%d"`

echo $outdate

If you execute it output will be

2011-08-06

So it solves our purpose

However , if you want to get yesterday date , following command will help:

$date -d "-1 day" "+%Y-%m-%d"