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Perl is a powerful tool, as common to web developers and GNU/Linux "power users" as pneumatic impact wrenches are to a mechanic. Perl is an all-purpose "glue language," and its flexibility makes it a choice utility capable of doing lots of stuff. Its power is accompanied by something of a learning curve, which means that it takes longer to learn Perl than it does (say) sed or awk.
nmake - If you download modules from CPAN, you will often need to install them with the 'make' utility. NMAKE15.EXE is a self-extracting zip file. When it's executed, it will create 3 files on your disk (nmake.exe, nmake.err, and readme.txt). Move nmake.* to c:\perl\bin, which should be on the path. Then you can run this standard perl command set for installing modules:
perl Makeinstall.PL nmake nmake test nmake install
I haven't written too many cool things in Perl, but here are a couple of basic, simple type scripts that I'd like to share.