b43-fwcutter software package provides utility for extracting Broadcom 43xx firmware, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install b43-fwcutter
b43-fwcutter is installed in your system.
Make ensure the b43-fwcutter package were installed using the commands given below,
$ sudo dpkg-query -l | grep b43-fwcutter *
You will get with b43-fwcutter package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Utilities |
| Package | b43-fwcutter |
| Version | 1:019-2 |
| Description | utility for extracting Broadcom 43xx firmware |
| Sub Section | Utils |