How to install wireless NIC Driver in Ubuntu and install wireless Nic In ubuntu

How to install wireless NIC Driver in Ubuntu and install wireless Nic In ubuntu
Acer (acer) cannot use wifi after Ubuntu is installed. The solution is as follows:

Ps: Acer wireless network cards are generally Broadcom

Step 4: 1. Create a New cdrom folder in the media folder under the root directory and enter sudo mkdir/media/cdrom on the terminal. 2. Load the installation package, that is, the Ubuntu system image (iso file). Enter the sudo mount-t iso9660-o loop/* system image path */media/cdrom on the terminal.

3. Open settings-> Software and updates, select "install from optical drive" at the bottom, and enter the command sudo apt-get install bcmwl-kernel-source on the terminal. (My computer is acer4752G, and my wireless NIC Driver is bcmwl ).

4. Restart your computer