How to open a file and save it in linux

For example, if you want to modify the host file

First use the vi /etc/hosts command to open the reading mode of the hosts file and press the o key to enter Edit mode and inserts a line after the current position.

After entering the content, press the Esc key to exit the editing mode and enter the reading mode.

Command:wSave the file;

Command:qExit.

Related video learning tutorial recommendations: linux video tutorial

Edit mode command:

i: Insert # at the current position

##a: Append after the current position

o: Insert a line after the current position

I: Insert at the beginning of the line

A: Append at the end of the line

O: Insert a line before the current position

Reading mode command:

:w Save file

:w filename Save as filename file

:q Exit

:q! Force exit

:w! Force write

:wq Save and exit

:x Same as wq

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