I prepared the following code before I realized that AnomalousMonk had already made almost the same suggestion as an advanced point. I have chosen to post it because it does not produce your expected output. Perhaps we misunderstand your requirement. 
use strict;
use warnings;

my $file1 = \<<"END1";
he is man
don't you
what goes on
END1

my $file2 = \<<"END2";
he is
what are
try to do
END2


open  my $h2, '<', $file2 or die "cannot open file2";
my @a2 = <$h2>;
close $h2;
chomp @a2;
my $match = join '|', @a2;
$match = qr/$match/;

open  my $h1, '<', $file1 or die "cannot open file1";
my @a1 = <$h1>;
close $h1;

print  grep {$_ =~ $match} @a1;

[download]

OUTPUT:

he is man

[download]
Bill

In reply to Re: partial matching of lines in perl by BillKSmith
in thread partial matching of lines in perl by Sidd@786

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