To quit the Vi or Vim text editor without saving any changes you've made to the current file, you can use the :q! command.
For example, to quit Vim without saving any changes, you can press the Esc key to enter normal mode, and then type :q! and press Enter. This will exit Vim without saving your changes.
Alternatively, you can use the :qall! command to quit all open Vim instances and close all open files without saving any changes.
It's important to note that these commands will discard any changes you've made to the current file, so be sure to save your work before quitting if you want to keep your changes.
To save your changes and quit Vim, you can use the :wq command. This will save your changes and exit the editor.
You can also use the :x command, which is a shorthand for :wq. This will save your changes if there are any, and exit the editor. If there are no changes to save, :x will simply exit the editor.
Finally, you can use the :wq! command to force a save and quit, even if the file is read-only or you don't have permission to write to it. This can be useful if you need to save your changes and exit the editor even if you don't have the necessary permissions.