You do not need any commands or manual. It can be done through the GUI with
Synaptic.

Go to Settings| Administration| Synaptic. After giving your password, Search for
Gutenprint. Then it will bring up all instances of Gutenprint. If
cupsys-driver-gutenprint is not installed then check it to install by right
clicking on it and then choose Mark for installation. If it prompts you to
install dependencies answer yes. Then click the Apply button. While you are
there make sure that foomatic is installed (has a green box).. If not install
it.

Now try installing the printer once again now that the drivers are installed. Go
to |Settings |Administration | Printing. click on |Printer | Add a Printer. It
should bring load the database and then you can install the Brother printer. It
has to be there because I use it all of the time.