seeking for your opinions in every aspect

Since you are posting this code here for others to use, add POD (perlpod). POD adds a standard way of describing to other users what the code does and how it should be used, as well as any known limitations. If you are unfamiliar with POD, then this is an opportunity to add this to your toolkit.

Update: For example, a standard way to get help on a program is to use perldoc. If I downloaded your code and named it "dup2link", then, from my command line I could:

perldoc dup2link
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