Unable to Upgrade from 13.04 to 13.10

Posted by Mohit on Ask Ubuntu See other posts from Ask Ubuntu or by Mohit
Published on 2013-10-25T15:29:06Z Indexed on 2013/10/25 16:12 UTC
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Following is what I get as error

Error during update 

A problem occurred during the update. This is usually some sort of 
network problem, please check your network connection and retry. 

W:Failed to fetch 
http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/main/source/Sources 
404 Not Found 
, W:Failed to fetch 
http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/source/Sources 
404 Not Found 
, W:Failed to fetch 
http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/source/Sources 
404 Not Found 
, W:Failed to fetch 
http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/source/Sources 
404 Not Found 
, E:Some index files failed to download. They have been ignored, or 
old ones used instead. 


Restoring original system state

I am using command line "do-release-upgrade"

I have changed my dns to google public dns and verified that using nslookup and host -v

could not find bg.archive.ubuntu.com in any of the source list files.

not only in that in another tab I have ping google running just to verify that network is not down. Network has no issues.

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