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I have recently installed ubuntu 12.04 LTS on my laptop. When I tried to install a package using terminal I got some errors like it has no installation candidate.For different package also I got the same error.Then I tried to do software update of my ubuntu.But when I tried I got the error like - Failed to download repository information Check your Internet connection. Since I am well connected to a LAN connection ,so I don't think its my network problem,but I don't know where the problem is.Please give me some suggestion.

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    – opu 웃
    Feb 17, 2014 at 14:59

1 Answer 1

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It's a network problem. Just because you are connected to LAN doesn't guarantee (full) Internet access. If you know you have Internet access then it may be a firewall issue.

Try to ping the repository and see if you get a DNS resolution and response. For example, if you are using the U.S. repository then try this:

ping us.archive.ubuntu.com

If you are in another country then you should use a repository closer to you. You can check your sources (/etc/apt/sources.list) to see which servers you are trying to connect to.

If you don't resolve or cannot ping then I suspect that you are being blocked.

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