vi

To Start vi

*	vi filename	edit filename starting at line 1
	vi -r filename	recover filename that was being edited when system crashed

To Exit vi

whenever a colon (:) is typed.

*	:x<Return>	quit vi, writing out modified file to file named in original invocation
	:wq<Return>	quit vi, writing out modified file to file named in original invocation
	:q<Return>	quit (or exit) vi
*	:q!<Return>	quit vi even though latest changes have not been saved for this vi call