Midnight Commander Cheat Sheet

Table of Contents

• 1. General
• 2. Command Prompt
• 3. Files Selection
• 4. File View mode
• 5. References

1 General

On modern keyboards instead of [META] both [ALT] and [ESC] can be used.

Shortcut	Description
TAB	Jump from one panel to the other
C-u	Swap panels
C-r	Refresh current pane
C-l	Redraw current pane
C-\	Show the directory Hotlist
C-SPACE	Show current directory size
M-i	Make the other panel show the same directory as the active panel
M-c	Quick cd dialog
M-?	Search dialog
M-.	Toggle "Show Hidden Files" feature
M-,	Switch MC layout from left-right to top-bottom
M-t	Change panel listing mode: standard, brief, full
M-o	Load the directory under the cursor on the other
	panel and move the selection to the next one in the current panel
M-SHIFT-h	Show the directory history
M-y	Move to the previous directory in the directory history
M-u	Move to the next directory in the directory history
SHIFT-F4	Create new file

2 Command Prompt

Shortcut	Description
C-o	Drop to the console
M-TAB	Command prompt auto-completion
M-Enter	Copy file/directory name to the prompt
M-a	Copy file/directory name to the prompt (full path included)
M-h	Show command prompt history
M-p	Returns the previous command prompt
M-n	Returns the next command prompt
C-x t	Copy all your selected files to the prompt
C-x C-t	Copy all your selected files to the prompt for the opposing panel
C-x p	Copy the current path to the prompt
C-x C-p	Copy the current path to the prompt for the opposite panel

3 Files Selection

Shortcut	Description
Insert or C-t	Select/deselect file
*	Invert selection on files
+	Specify file selection options
-	Specify file de-selection options

4 File View mode

Shortcut	Description
C-f	View the next file
C-b	View the previous file

5 References

• http://nawaz.org/media/docs/mc/mc.pdf
• http://klimer.eu/2015/05/01/use-midnight-commander-like-a-pro/
• https://midnight-commander.org/rufork/docs/mc_hotkeys_en.pdf

Lisp Expressions vs. Lisp Forms

Table of Contents

• 1. Lisp Expressions vs. Lisp Forms
  • 1.1. General
  • 1.2. Examples
  • 1.3. References

1 Lisp Expressions vs. Lisp Forms

1.1 General

During my Lisp studies (Emacs Lisp and Clojure), I often encountered the terms: Lisp "Expression" and Lisp "Form" and I started wondering what is the difference since most literature seems to use both terms interchangeable.

An excerpt from: “Living Clojure” - Carin Meier

"An expression is [Lisp] code that can be evaluated for a result, and a form is a valid expression that can be evaluated"

In other words an expression is a valid input for the LISP `READ` (REPL) while a form is a valid input for both the `READ` and the `EVAL` part of the (REPL).

1.2 Examples

The below is a valid form (valid both for the `READ` and the `EVAL`)

(+ 1 2)

;; => 3

The below (assuming the 'foo' function is not defined) is a valid expression but not a valid form, it can be read but not evaluated since 'foo' is not defined:

(foo 1 2)

;; => Syntax error compiling at (REPL:1:1). Unable to resolve symbol: foo in this context

1.3 References

• https://en.wikipedia.org/wiki/S-expression
• https://stackoverflow.com/questions/17206657/are-lisp-forms-and-lisp-expressions-same-thing