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From: "bcochofel" <bruno.cochofel@gmail.com>
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Subject: Re: dired mode or norton commander
Date: 7 Dec 2006 04:27:52 -0800
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Well, I've tried:
;-------------------------------------------------------------
 (defun dired-follow-file ()
  (interactive)
  (let ((filename (dired-get-filename)))
    (if (file-directory-p filename)
        (find-alternate-file filename)
      (dired-find-file))))

(defun dired-setup-follow-file ()
  (substitute-key-definition
   'dired-find-file 'dired-follow-file dired-mode-map)
  (substitute-key-definition
   'dired-advertised-find-file 'dired-follow-file dired-mode-map))

(add-hook 'dired-mode-hook 'dired-setup-follow-file)
;---------------------------------------------------------------

But I cannot change to dirs '.' and '..', I get:

"Cannot operate on '.' or '..'

Using the "a" key I get a message asking if I want to use in all
sessions this options and I answer yes... No good...