Shulou(Shulou.com)06/03 Report--

ESC key jumps to command mode

Then:

W Save the file without exiting vi

W file saves the changes to file and does not exit vi

: w! Forced save, do not launch vi

Wq saves the file and exits vi

: wq! Force to save the file and exit vi

Q: quit vi without saving the file

: q! Do not save the file, force to exit vi

: e! Discard all changes and edit since the last time the file was saved

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