Debian ABC --- 1st time ---2

sudo apt-get update  
sudo apt-get install linux-headers-generic build-essential dkms  
sudo apt-get install linux-source  
sudo apt-get install --reinstall bcmwl-kernel-source  

apt-get install --reinstall bcmwl-kernel-source  
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package bcmwl-kernel-source

sudo modprobe wl   
sudo dpkg -i wireless-bcm43142-dkms_6.20.55.19-1_amd64.deb

apt install broadcom-sta-dkms

apt install broadcom-sta-dkms
Reading package lists... Done
Building dependency tree       
Reading state information... Done
broadcom-sta-dkms is already the newest version (6.30.223.248-3).
0 upgraded, 0 newly installed, 0 to remove and 98 not upgraded.