Module Usage Comment
Cwd $dir = cwd; current working directory
File::Copy copy "oldfile", "newfile";
move "oldfile", "newfile"; this works between file systems as well
File::Basename basename "/a/b/c/file.pl"; file.pl
dirname "/a/b/c/file.pl"; /a/b/c
File::Path mkpath("a/b/c") (like mkdir -p)
rmtree("/")
File::Find
File::Find::Rule