This is where the problem begins! You may try to add the printer through the
GNOME interface. Go in the preference menu, then the icon about printers.
Click on add a printer. If the printer is on your intranet, you should see it
after a small time of loading. Click on it to add the printer. You may have an
error on this step. Why this is not working? No idea.
However, the printer can also be added through the CUPS interface. Open your
web browser and go to your local port 631
(localhost:631/admin). You will be asked for a
login and a password. These are the ones about the root account of your
computer. Now, you can add the printer, it should work.