GNU/Linux Printer Brother MFC-L2740DW/MFC-L2770DW Setup – Step-by-step Guide
How to Install Brother MFC-L2740DW/MFC-L2770DW Printer in GNU/Linux desktops – Step by step Tutorials.
Brother has developed a Printer Driver Installer Tool for Linux that simplifies the process by automatically downloading and installing the necessary dependencies across various Distros.
The Tool will install LPR, CUPSwrapper, and Scanner (For All-in-One Models) Drivers.

GNU/Linux Add Brother MFC-L2740DW/MFC-L2770DW Printer Guides