Exiting Emacs,Fixing Mistakes and other Important Stuff

 Exiting Emacs,Fixing Mistakes and other Important Stuff

C-x C-c	Save-buffers-kill-emacs: when you are finished  editing, and to return you to the UNIX prompt.
C – g	Keyboard-quit: if while typing a command you  make a mistake and want to stop, this aborts a  command in progress.
C- u	Universal- argument: if you want to do a command  several times, type this command followed by a  number ( for the number of times) folllowed by the command you wish repeated.

C – x  u	Undo: undoes the last command typed, in case you  made a mistake.
Esc  x	Execute-extended-command: prompts for the name  of an emacs command; allows you to execute a  command if you know roughly what it is called but  cannot remember the key strokes for it.