[mcmahon@joe-desk ~]$ ls -R ./example/
./example/:
file  nonempty_files_only  nonempty_has_dirs

./example/nonempty_files_only:
file1  file2

./example/nonempty_has_dirs:
file1  one  two

./example/nonempty_has_dirs/one:

./example/nonempty_has_dirs/two: