How to get 10 days back date by giving one date as parameter to the shell script -

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if give date "20130828"(not current date) in yyyymmdd format, how can 10 days date using shell script i.e. 20130818
in advance!

try

date +%y%m%d --date="20130818 -10 day"

or even

date +%y%m%d --date="20130818 10 days ago"

+%y%m%d format of date (yyyymmdd), , through --date can provide string (in human readable format) specify when want date.


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