Using nano

GNU nano is a small and friendly text editor. Besides basic text editing, nano offers many extra features, such as an interactive search-and-replace, undo/redo, syntax coloring, smooth scrolling, auto-indentation, go-to-line-and-column-number, feature toggles, file locking, backup files, and internationalization support.

Nano

1. For editing a file, you should run nano as follows:

   name@hostname ~ $ nano my_file.py
   

2. Once your file is opened, you are ready to go and edit the lines you need to.
3. When you're ready to save the changes and exit the file, you must hit Ctrl + X, then Y and finally [ENTER]