As you mention Debian (a GNU/Linux distro), I'll throw in my .02$: check out the Linux namespace on CPAN. You'll find lots of Linux specific packages that could leverage your fiddlings. For instance, one module I personally tend to overuse from time to time is Linux::Smaps. Here's a sample usage:

$ perl -MLinux::Smaps -le '$sm = Linux::Smaps->new($$); \
   sub psize { $sm->update; print $sm->size; }  \
   psize(); require POSIX; psize(); POSIX->import; psize();'
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If you want something even more fancy, try GTop. Here's a sample usage:

$ perl -MGTop -le '$gtop = GTop->new; \
   sub psize { print $gtop->proc_mem($$)->size; } \
   psize(); require POSIX; psize(); POSIX->import; psize();'
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