Broadcom B43 WiFi not working in Ubuntu 14.04 LTS

For Broadcom BCM4311,

sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source broadcom-sta-dkms

sudo apt-get install b43-fwcutter firmware-b43-installer

See here https://help.ubuntu.com/community/BroadcomSTA(Wireless)

you can go to

settings> Software and updates > additional drivers

you can get most of wireless/Graphics drivers. You can install any 3rd party driver software you require. Hope that helps!

If you're using a Broadcom (BCM43xx) wireless network card like me, this might help.

I connected the laptop using a cable and ran:

sudo apt-get install firmware-b43-installer   

to install the driver and then rebooted.

(It would be helpful to add your network card to the question.)