How Linux vi saves the edited file

Press ESC to return to command mode, enter: W to save, or enter: wq! Save the file and exit.

Here is the Save command:

: W saves the file but does not exit VI.

: W file saves the modification to file and does not exit VI.

: w! Forced to save, do not introduce VI.

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Use of Vi/vim

Basically Vi/vim is divided into three modes, namely command mode, input mode and bottom line command mode. The three modes of action are:

Command mode:

The user has just started Vi/vim and entered command mode.

In this state, the keystrokes are recognized by VIM as commands rather than as input characters. For example, we press I at this time and do not enter a character, I is treated as a command.

Here are a few common commands:

I switch to input mode to enter characters.

x deletes the character at which the current cursor is located.

: Switch to Baseline command mode to enter commands at the bottom of the line

How Linux vi saves the edited file