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**strong text**Recently i had installed Ubuntu 14.04 LTS 64-bit.

It is dual-boot with Windows 7 Ultimate. The Ethernet works good in Windows but in Ubuntu does not work.Actually,it worked for 2-3 days,then suddenly it stopped .. so, i tried to reinstall the driver(RTL8101E/RTL8102E), but every time it shows error asking about the "PRIVATE KEY"...

What is this private key? ... wireless works very much fine....

plzz post ur suggestions regarding this problem??

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Sometimes when you add a custom repository you have to use the command apt-key add [whatever-the-key-is]. When you try to install something from the custom repository without the right apt key, you will get a key error like the one you are seeing. Go back and make sure you added the right key, and then apt-get update && apt-get install --reinstall [RTL8101E/RTL8102E driver packagename]

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