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  1. or download this
    #!/usr/bin/perl
    use strict;
    use warnings;
    my $tmp_dir="/tmp";
    opendir (DIR, $tmp_dir) or die $!;
    
  2. or download this
    while (my $file_name = readdir(DIR)) {print "$file_name\n";}
    
  3. or download this
    closedir(DIR);