Use File::Find - it comes with Perl. This task would be even easier to do using File::Find::Rule, actually. 
my @matching_file = File::Find::Rule
    ->file()
    ->name( '*.html' )
    ->grep( qr/\Q$keyword/ )
    ->in( "." );

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Makeshifts last the longest.

In reply to Re: searching all directories with perl by Aristotle
in thread searching all directories with perl by atnonis

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