Wifi on ubuntu

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Many users face problem of their wifi not working on ubuntu 11.04+, because of Missing Drivers.
Now you can follow these simple steps to get the wifi drivers and your wifi working without restarting the system.

1. sudo apt-get install bcmwl-kernel-source

2. sudo modprobe -r b43 ssb wl

3. sudo modprobe wl

If you get some modules missing on step 2, try installing the headers and sources.

  sudo apt-get install linux-headers-$(uname -r)