To find out location of the Perl interpreter, you can use either 'which' or 'whereis'; e.g.,

%which perl
%whereis perl
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Provided that Perl is installed and you know it's location, the following should work

#!/perl/is/here/perl -w
use strict;
use CGI;
my $q = new CGI;
print $q->header();
print "<b>Howdy!</b>";
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--perlplexer