#!/usr/bin/perl

use strict;
use warnings;

# check for valid usage (user must provide a directory path):

(@ARGV == 1 and -d $ARGV[0]) or die "Usage: $0 /path/to/scripts\n";

my $path = shift;
{
    local $/;   # set input record separator to undef (slurp-mode reading)

    for my $file (<$path/*.pl>)  # use a file glob 
    {
        open( F, "<", $file ) or next;
        $_ = <F>;
        close F;
        s{/usr/bin/perl}{/test/test/test}g;
        s{/ggg/ggg/www}{/zzz/zzz/zzz}g;
        s{/jjj/jjj/jjj}{/aaa/aaa/aaa}g;
        open( F, ">", $file ) or die "$file: $!";
        print F;
        close F;
    }
}