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  1. or download this
    $ perl -le 'print $c++ for 0..0xFFFF' > test; ls -l test
    -rwxr-xr-x 1 user user 382106 2006-11-14 15:04 test
    ...
    Bad file descriptor => 1
    Bad file descriptor => 2
    ...
    
  2. or download this
    #!/usr/bin/perl -Wl
    use strict;
    ...
    }