When I run the command
sudo apt-get update I get the following error:
W: Failed to fetch http://archive.canonical.com/ubuntu/dists/raring/Release Unable to find expected entry 'precise/source/Sources' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch http://archive.canonical.com/raring/dists/precise/partner/source/Sources 404 Not Found W: Failed to fetch http://archive.canonical.com/raring/dists/precise/partner/binary-amd64/Packages 404 Not Found W: Failed to fetch http://archive.canonical.com/raring/dists/precise/partner/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
Can someone help me to solve these errors ?