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.