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  1. or download this
    #!/usr/bin/env perl
  2. or download this
    [canker:~]$ ls -l test.pl
-rwxr-xr-x  1 chris  users  35 Sep 17 11:52 test.pl
...

print "$]\n";
[canker:~]$
  3. or download this
    [canker:~]$ ./test.pl
5.008008
[canker:~]$
  4. or download this
    [canker:~]$ PATH=/opt/perl-5.10.0/bin:$PATH ./test.pl
5.010000
[canker:~]$