A Dired buffer displays just one directory in the normal case; but you can optionally include its subdirectories as well.
The simplest way to include multiple directories in one Dired buffer is
to specify the options `-lR' for running
ls. (If you give a
numeric argument when you run Dired, then you can specify these options
in the minibuffer.) That produces a recursive directory listing showing
all subdirectories at all levels.
But usually all the subdirectories are too many; usually you will prefer to include specific subdirectories only. You can do this with the i command:
Use the i (
dired-maybe-insert-subdir) command on a line
that describes a file which is a directory. It inserts the contents of
that directory into the same Dired buffer, and moves there. Inserted
subdirectory contents follow the top-level directory of the Dired
buffer, just as they do in `ls -lR' output.
If the subdirectory's contents are already present in the buffer, the i command just moves to it.
In either case, i sets the Emacs mark before moving, so C-u C-SPC takes you back to the old position in the buffer (the line describing that subdirectory).
Use the l command (
dired-do-redisplay) to update the
subdirectory's contents. Use k to delete the subdirectory.
See section Updating the Dired Buffer.
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