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When I try to run the following command in Ubuntu 13.04:

sudo apt-get update

I got following error:

W: Failed to fetch 
     com/xampp/ubuntu/dists/raring/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones  used
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marked as duplicate by Radu Rădeanu, Avinash Raj, minerz029, don.joey, guntbert Jan 11 '14 at 11:19

This question was marked as an exact duplicate of an existing question.

Did you add a ppa(…) recently? – i08in Jan 11 '14 at 9:21
If yes, remove the ppa( and try this again. – i08in Jan 11 '14 at 9:26
i try above all command but i failed to fix this – user2454624 Jan 11 '14 at 9:42

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