By default, dired creates new buffers when visiting new directories. Sometimes this is desired, especially when you need to visualize the contents of two separate directories; however, when you’re just navigating around, all the extra buffers tend to clutter your buffer list.
Typical navigation is done with dired-find-file (bound to f, RET, or [...]
By default, dired only deletes empty directories. You know the drill. Put your point on the directory, D, y (yes), “file-error Removing directory directory not empty,” (slam fist on table). Doh!
Fortunately, dired supports deleting directories recursively. Add this to your .emacs:
(setq dired-recursive-deletes ‘top)
The dired-recursive-deletes variable decides whether recursive deletes are allowed. [...]