vi or vim (Vi IMproved) is text editor or a programmers text editor. You can edit programs or configuration files on the Linux/Unix server. Vim is upwards compatible to Vi. You can start vi/vim by typing the following command:
vim file
vi file
vim [options] filename

How to save and quit the vi or vim text editor

To save and quit the vi or vim editor with saving any changes you have made:

1. If you are currently in insert or append mode, press Esc key.
2. Press : (colon). The cursor should reappear at the lower left corner of the screen beside a colon prompt.
3. Enter the following command (type :x and press Enter key):

   x

   OR

   x!

   OR

   wq!

4. Press ENTER key
5. This will quit the editor, and all changes you have made to the document will be saved to the file.

Use x to save a file and exit:

How to trash all changes in vi/vim

If you do not want to save any changes, first press Esc key. To exit Vim without saving changes press :q! followed by ENTER key.

Getting more help about vim commands

Want to learn vim text editor? Start the vim tutor by typing the following command at the Linux, macOS, and Unix-like system:
$ vimtutor
$ vimtutor it
$ vimtutor fr

Summary of vim/vi commands