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I've seen a ton of answers to fix my BroadCom BCM4312.

However, all of them require apt-get in the Terminal. For whatever reason, anything involving apt-get won't work. It just errors out with Unable to locate package [package]

Forgive me if this is an easy question; I just downloaded Ubuntu today.

Edit: I do have internet connection when using an Ethernet cord.

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First check that you have type exact name of package and Your system should be updated. – K.K Patel Jan 11 '13 at 3:36

If you have no Internet connection, you can't install (as normal) by apt-get, as apt-get uses external servers etc.

Does this give you any help?: After installing ubuntu 12.04 my internet connection has completely disappeared

In short; you could try to follow these instructions, or download by directly searching, save to USB stick etc., and install on your machine without a network connection, using sudo dpkg -i /path/to/package.deb (or double-click it to pull up the Software Centre).

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I do have an internet connection, using eithernet. I haven't checked the other things I can do yet (doing about 1000 other things atm) so I'm not sure if they work. – Frank Jan 11 '13 at 3:22
@chipperyman573: If you have internet using wire, use apt-get by that, then switch to wireless. – Runium Jan 11 '13 at 3:25

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