GNU/Linux Ubuntu Installing b43-fwcutter Guide
How to Download and Install b43-fwcutter on Ubuntu GNU/Linux – Step by step Tutorial.
And b43-fwcutter for Ubuntu is a Tool for extracting BCM43xx Wireless Chip Firmware from Broadcom’s Proprietary Driver Files.
Finally, this guide includes detailed instructions about Installing b43 Wirelesss Drivers with b43-fwcutter on Ubuntu.

1. Terminal QuickStart
How to QuickStart with Command Line on Ubuntu
First, update the Apt Repo with:sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
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