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Press Esc key: This is very important, because you must exit the edit mode first before typing the exit command(s). Next, you can type one of the following commands:
:q (yes, the colon is included in the command) – This will quit the editor
:q! – Quit Vim without saving the data file
:wq – Save the file and exit Vim
And then press the Enter key
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:w – write (save) the file, but don’t exit
:w !sudo tee % – write out the current file using sudo
:wq or :x or ZZ – write (save) and quit
:q – quit (fails if there are unsaved changes)
:q! or ZQ – quit and throw away unsaved changes