Many perl functions are derived from unix library or system functions. Learning to use them in perl is a great education in unix. If you know unix, you have a head start on learning perl.

I second that and although for various reasons I've recently turned into a sort of self-unsatisfied Windows-kinda-guy who plans of turning back to Linux (and maybe *BSD) as much as possible, without ever finding the time to do so, basically I would describe myself as *NIX-oriented mind. However on the basis of a rational thinking rather than on that of an emotional one, I think that that kind of heritage in Perl is not that good... in fact as far as basic language features are concerned, I think it would be better for the language itself for it to be OS-agnostic not only in actual functionality, but even in look & feel. I think that they're trying to "correct" this bias for Perl 6.

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