linux vi editing and finishing

:w save file without exiting vi
:w file additionally save changes to file without exiting vi
:w! force save without exiting vi
:wq save file and exit vi
:wq! force save file and exit vi
q: Do not save the file, exit vi
:q! Do not save the file, force quit vi
:e! Abandon all changes, start editing from the last time the file was saved