When the Debian 7 system is installed, the network device will be detected, this time will be prompted to say there is a missing firmware, whether to load from removable media, the installation of the choice of No. Continue to install the system. Installed after the discovery of the wireless network firmware is missing, unable to link to the wireless network, this time only remembered to install the system when the hint of the missing firmware name, so in the installation must note any questions, in case of problems in the future can be queried, saying, be prepared!! If not noted, unless you know your computer wireless network card model, otherwise you have to restart the system installation program, run probing network equipment, note the missing firmware file name. Install wireless Drivers If we have noted the name of the missing firmware before, we will install the missing firmware. 1. Configure the source, because the missing firmware is non-open source, so to add the appropriate source, see the official Debian wiki. #Debian 7 "Wheezy" deb http://http.debian.net/debian/ wheezy main contrib Non-free 2. Install Firmware-iwlwifi firmware sudo apt-get update && sudo apt-get install firmware-iwlwifi 3. Install the corresponding missing firmware, my notebook is missing is b43/ucode15.fw b43-open/ucode15.fw  RTL_NIC/RTL8168D-1.FW. The official Debian documentation explains the installation of the BCM43 series of network cards, see the official wiki, and install the corresponding Firmware-b43[legacy/-lpphy]-installer according to your network card type. Probably choose to be like this, for BCM4306 third generation, BCM4311, BCM4318, BCM4321, BCM4322 network card type, need to install Firmware-b43-installer, command: sudo apt-get install firmware-b43-installer;   For BCM4312 lp-phy, you need to install the firmware-b43-lpphy-installer, command: sudo apt-get install firmware-b43-installer; for BCM4306 second generation, BCM4301 need to install Firmware-b43legacy-installer,Command: sudo apt-get install firmware-b43legacy-installer; a large long string of extracting b43/0****** will appear after installation ... Instructions to install successfully, quickly link the wireless network to try. Source: http://blog.csdn.net/swagle/article/details/12838285
Debian installs unlimited network adapter drivers