Você pode conseguir fazer o seguinte:
sudo apt-get update
sudo apt-get install brother-cups* brother-lpr*
Se esses pacotes não estiverem disponíveis, você precisará ativar os repositórios universe / multiverse.
O acima deve instalar os seguintes pacotes e dependências:
brother-cups-wrapper-ac - Cups Wrapper drivers for ac brother printers
brother-cups-wrapper-bh7 - Cups Wrapper drivers for bh7 brother printers
brother-cups-wrapper-common - Common files for Brother cups wrapper packages
brother-cups-wrapper-extra - Cups Wrapper drivers for extra brother printers
brother-cups-wrapper-laser - Cups Wrapper drivers for laser brother printers
brother-cups-wrapper-laser1 - Cups Wrapper drivers for laser1 brother printers
brother-cups-wrapper-mfc9420cn - Cups Wrapper drivers for mfc9420cn brother printers
brother-lpr-drivers-ac - LPR drivers for ac brother printers
brother-lpr-drivers-bh7 - LPR drivers for bh7 brother printers
brother-lpr-drivers-common - Common files for brother-lpr-drivers packages
brother-lpr-drivers-extra - LPR drivers for extra brother printers
brother-lpr-drivers-laser - LPR drivers for laser brother printers
brother-lpr-drivers-laser1 - LPR drivers for laser1 brother printers
brother-lpr-drivers-mfc9420cn - LPR driver for mfc9420cn brother printer
Caso contrário, entre em contato com o suporte da Brother por telefone e peça que o acompanhe durante o processo. Você precisará instalar as versões "deb" do Linux e não as "rpm".