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i am using ubuntu 12.04 lts. i m trying to update but i get an error

Failed to download repository information Check your Internet connection.

My internet connection is fine.

when i see details of the error an get this

W:Failed to fetch Unable to find expected entry 'main/source/Sources' in Release file (Wrong sources.list entry or malformed file) , E:Some index files failed to download. They have been ignored, or old ones used instead.

any help please

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The instructions here may fix the issue: – waldyrious Mar 4 at 16:27

Go to Software Sources > Other Software and Uncheck the checkbox against and Click on Close.

Now go and check for updates.

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Thanks for the answer,but unfortunatelly it doesnt give me that option.I mean i dont have the . but i have the main and main(source code) any help now? :-) – faraw Jan 19 '13 at 9:58
i removed the above reps and everything is ok. thanks mate :-) – faraw Jan 19 '13 at 11:03

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