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I installed ubuntu 12.10 using windows installer(wubi). When I tried to update it using "sudo apt-get update", it didn't work and showed something like this

Something wicked happened resolving '' (-5 - No address associated with hostname) Err quantal/main i386 Packages

I'm using a proxy network.I'm a beginner.So, plz tell me what to do in detail.

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Possible duplicate: – user98085 Jan 8 '13 at 4:07

It cannot resolve hostname. You may need to change the nameserver to

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I recommend expanding this answer to explain how to do that. – Eliah Kagan Jan 8 '13 at 4:39
I've already done that(change the nameserver), didn't work. – Soumen Jan 8 '13 at 16:26

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