Unattended?

[ghost]

Is it possible to make this script unattended so it does all cleaning and updating automatically?

[cubanpit]

There is no such option in the current version of the script, but you can try by piping some input, for example using yes.
I currently have no plans to add such an option, since many steps require superuser privileges and are not supposed to run without user supervision.
If you have any suggestion on this, feel free to comment here or create a pull request.