How to install the Wireless NIC driver after ubuntu12.04 is installed

After Ubuntu is installed, the wireless network card is unavailable. you can use the following methods to solve this problem. For more information, see Ubuntu.

1. run the following command on the terminal to reinstall all drivers and firmware related to b43:

Copy codeThe code is as follows:
Sudo apt-get install bcmwl-kernel-source # Broadcom 802.11 Linux STA wireless driver source
Sudo apt-get install broadcom-sta-common
Sudo apt-get install broadcom-sta-source
Sudo apt-get install b43-fwcutter # Broadcom 43xx firmware extraction tool
Sudo apt-get install firmware-b43-installer

2. run the following command to activate the wireless network card:

Copy codeThe code is as follows:
Sudo modprobe-r b43 ssb
Sudo modprobe b43

3. perform the following operations to add the wireless network adapter to the startup so that the Wi-Fi network can be automatically scanned every time the system is started:
Add the sudo modprobe b43 command to the/etc/rc. local file before exit.