Wireless Not Working Ubuntu 12.04 new computer

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http://askubuntu.com – I just bought a laptop from CyberPower PC company and opted out of spending $39 for them to install windows 8. I just booted Precise Pangolin from a flash drive and installed it on my computer. Everything works fine except for the wireless capabilities. I have looked at several of the posts on the forum and haven't been able to ascertain the solution to my problem. I know that the wireless network card is from Atheros and that's about it. When I tried the iwconfig command and this is what came up and this is what resulted: $ sudo iwconfig lo no wireless extensions eth0 no wireless exten (HowTos)