Quitting vi

  There are a number of ways (actually ex commands) of getting out of vi:

q

Quit vi if no changes are pending.

q!

Quit vi regardless of whether changes are pending or not.

ZZ

Write any changes (if needed) and exit.

To write any changes in the active file to disk, enter the command ``:w''. Viewed this way, ``:ZZ'' is the same as ``:w'' followed by ``:q''.