Linux - emacs cheat sheet

Basic emacs

C denotes the Ctrl key, so C-x means press Ctrl and x together. M denotes the Alt key in the same way.

Launch emacs:
emacs -nw -Q

Display interactive tutorial:
M-x help-with-tutorial

Full reference card can be found here.

Emacs and the node.JS REPL

Launch emacs:

emacs -nw file.js

C-x 3           Split the window vertically
C-c !            Launch node.js REPL within emacs
M-o             Toggle to the other window
C-c C-j        Send current line of code to REPL and execute it
C-c C-r        Send the marked region of code to REPL and execute it (see reference card for how to mark)

Linux - screen cheat sheet

Notes from this tutorial. The tutorial also includes info on sharing screens, which is not here.

Command	Description
sudo apt-get install screen	Install screen
screen	Launch screen
Ctrl-t, then d	Detach screen
screen -list	Show all available screen sessions
screen -r screen -r -t name	Reattach to an existing screen session Reattach to the specific window name
Ctrl-t, then c screen screen -t name	Create a new window The last command will create a window and give it a name
Ctrl-t, then " (double quotation) Ctrl-t, then 0 to 9 Ctrl-t, then Ctrl-t again	Navigate windows by pressing up and down arrow keys, and enter to choose Jump to the window number specified Toggle between current and previous windows
exit Ctrl-t, then K Ctrl-t, then Ctrl-\	Kill the current window Kill the current window Kill all windows and exit
Ctrl-t, then A	Annotate (name) the current window
Make a .screenrc file in home directory, with the following: hardstatus on hardstatus alwayslastline hardstatus string "%{.bW}%-w%{.rW}%n %t%{-}%+w %=%{..G} %H %{..Y} %m/%d %C%a	Each new window will display a status line, which will include the window's name
Ctrl-t, then ?	Help
screen -L Ctrl-t, then H	Log the output from the current window to a file named ~/screenlog.n, where n is the window number Toggle logging on and off
Ctrl-t, then C	Clear a window

If screen stopped responding:

List screens:
screen -list

Output:
There is a screen on: 
   23536.pts-0.wdzee (10/04/2012 08:40:45 AM) (Detached) 
1 Socket in /var/run/screen/S-root.

Kill screen session:
screen -S 23536 -X quit