I learned perl, I think, 1994 or so on DOS (5.0, 6.2).

I had absolutely no problem changing to IRIX, Solaris and Mac OS X in regards to perl. The only problems arose when compiling or installing new modules. But everything is managable.

So my guess is: You won't have any trouble changing the OS as long as you need not manage the OS itself of course. So take whatever System you have, choose a good editor for writing your scripts and go ahead. BTW: I'd recommend jEdit as the editor of choice. You will then be able to stick to the same editor on any plattform you named.