you can find yesterday's yyyymmdd using 

my $timestampminus = time - 24 * 60 * 60;

my ($year, $month, $day) = (localtime($timestampminus))[5,4,3];

$year += 1900;
$month++;

print "Yesterday was $year$month$day.\n";

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In reply to Re^2: Picking up files based on datestamp by siva kumar
in thread Picking up files based on datestamp by subhankar

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