How to save and exit after modifying files under centos system

The saving command is as follows:

First, press the ESC key to switch to command mode, then:

:w Save the file without exiting vi

:w file Save the modifications to file without exiting vi

(Recommended tutorial: centos usage tutorial)

:w! Force save, Do not exit vi

:wq Save the file and exit vi

:wq! Force save the file and exit vi

:q Do not save the file and exit vi

:q! Do not save the file and force quit vi

:e! Abandon all changes and start editing again from the last time you saved the file.

Recommended related video tutorials: linux video tutorial

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