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  1. or download this
    #!/usr/bin/env perl
use 5.016;
use autodie;
...

exit 0;
__END__
  2. or download this
    $ perlcritic -1 syscall1.pl 
Backtick operator used at line 8, column 5.  Use IPC::Open3 instead.  
+(Severity: 3)
  3. or download this
    #!/usr/bin/env perl
use 5.016;
use autodie;
...

exit 0;
__END__