save file in terminal code example
Example: how to save any changes in vi editor
by press i you can `Insert` anything. After finshing changes then press :(colon)
and type wq!
syntex : wq!
Explanation : The ex mode is an extension of command mode. To get into it,
press Esc and then : (the colon).
The cursor will go to the bottom of the screen at a colon prompt.
Write your file by entering :w and quit by entering :q.
You can combine these to save and exit by entering :wq.
However, if you're finished with your file, it's generally more convenient to type Shift-z-z from command mode.