How do I install the Realtek RTL8273AE-Bt driver in Ubuntu 12.10?

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http://askubuntu.com – I found this answer where is explained how to install the Realtek RTL8723AE-BT driver. Here comes my real question: Since I am new to Ubuntu I don't know how to install the driver. Can someone explain to me, step for step, how to do this? Or just a simpler way? (HowTos)