How to save changes in Nano?

To save changes in Nano, follow these steps:

1. Press Ctrl + O: This command writes (saves) the changes to the file.
2. Press Enter: Confirm the filename if prompted (it usually defaults to the current file).
3. Press Ctrl + X: This command exits Nano.

These steps will save your changes and close the editor. If you want to exit without saving, you can press Ctrl + X and then choose not to save when prompted.