C-key   => hold down ctrl and press key

M-key  => hold Alt (or windows Key under linux) and press key

 

Essential Commands
C-h	help
C-x u / C-_	undo
C-x C-g	get out of current operation or command
C-x C-s	save the file
C-x C-c	close Emacs
Cursor movement
C-f	forward one character
C-b	back one character
C-p	previous line
C-n	next line
C-a	beginning of line
C-e	end of line
C-l	center current line on screen
C-v	scroll forward
M-v	scroll backward
M-f	forward one word
M-b	back one word
M-a	beginning of sentence
M-e	end of sentence
M-[	beginning of paragraph
M-]	end of paragraph
M-<	beginning of buffer
M->	end of buffer
Other Important Functions
M-(n)	repeat the next command (n) times
C-d	delete a character
M-d	delete a word
C-k	kill line
M-k	kill sentence
C-s	search forward
C-r	search in reverse
M-%	query replace
M-c	capitalize word
M-u	uppercase word
M-l	lowercase word
C-t	transpose characters
M-t	transpose words
C-@ / C-spc	mark beginning of region
C-w	cut--wipe out everything from mark to point
M-y	Change yanked text for previous
C-y	paste--yank deleted text into current location
M-q	reformat paragraph
M-g	reformat each paragraph in region
M-x auto-fill-mode	turn on word wrap
M-x goto-line <return> 16	move cursor to line 16
M-w	copy region marked
C-x C-f	find file and read it
C-x C-v	find and read alternate file
C-x i	insert file at cursor position
C-x o	Move to other window
C-x C-s	save file
C-x C-w	write buffer to a different file
C-x C-c	exit emacs, and be prompted to save
C-x 4 C-f	Find file and open in other window
C-M-v	Scroll other Window down