Computer Science 010

Emacs Cheat Sheet

Cursor Motion Commands:

C-f	Forward one character
C-b	Backward one character
C-n	Next line
C-p	Previous line
C-a	Beginning of line
C-e	End of line
C-v	Next screenful
M-v	Previous screenful
M-<	Beginning of buffer
M->	End of buffer
C-s	Search forward incrementally
C-r	Reverse search incrementally
C-x C-x	Swap mark and cursor

Editing Commands

C-d	Delete next character
Backspace	Delete previous character
M-x replace-string	Global string replacement
M-%	Query string replacement
M-d	Delete next word
C-k	Kill to end of line (delete to end of line)
C-w	Cut region
M-w	Copy region
C-y	Yank most recent cut/copy (paste command)
M-y	Replace yanked text with previously cut/copy text (only works immediatly after C-y or another M-y)

File Commands

C-x C-f	Open a file
C-x C-s	Save buffer to file
M-x revert-buffer	Throw out all changes and revert to the last saved version of the file.

Buffer Commands

C-x b <buffer name>	Replace the current buffer with the one with the given name
C-x 1	Make the current buffer be the only buffer
C-x 2	Split the current buffer into two buffers

Help Commands

C-h i	Info
C-h a	Apropos
C-h b	Key bindings
C-h m	Mode help

C Mode Commands

C-j	Insert a newline and indent the next line.
C-c C-q	Fix indentation of current function
C-c C-a	Toggle the auto-newline-insertion mode. (If it was off, it will now be on and vice versa.)
C-c C-d	Toggle the hungry delete mode
M-x c-set-style	Change the indentation style

Compilation Mode Commands

<return> on an error message

Scrolls the error to the top of the buffer and displays the C file containing that error in a second buffer, pointing to the line with the error

Miscellaneous Commands

C-x C-c	Exit Emacs
C-g	Cancel command
C-SPACE	Set mark
C-x u	Undo
M-x gdb	Start the gnu debugger
M-x shell	Start a shell in a new buffer
M-x print-buffer	Send the contents of the current buffer to the printer
M-x compile	Compile a program
M-x set-variable	Change the value of an Emacs variable to customize Emacs