W: Failed to fetch http://dl.google.com/linux/deb/dists/raring/Release.gpg Something wicked happened resolving 'dl.google.com:http' (-11 - System error) W: Failed to fetch http://packages.medibuntu.org/dists/raring/Release.gpg Something wicked happened resolving 'packages.medibuntu.org:http' (-11 - System error) W: Failed to fetch http://repository.spotify.com/dists/raring/non-free/binary-amd64/Packages 404 Not Found W: Failed to fetch http://repository.spotify.com/dists/raring/non-free/binary-i386/Packages 404 Not Found W: Failed to fetch http://dl.google.com/linux/deb/dists/raring/non-free/binary-amd64/Packages 404 Not Found [IP: 173.194.46.69 80] W: Failed to fetch http://dl.google.com/linux/deb/dists/raring/main/binary-amd64/Packages 404 Not Found [IP: 173.194.46.69 80] W: Failed to fetch http://dl.google.com/linux/deb/dists/raring/non-free/binary-i386/Packages 404 Not Found [IP: 173.194.46.69 80] W: Failed to fetch http://dl.google.com/linux/deb/dists/raring/main/binary-i386/Packages 404 Not Found [IP: 173.194.46.69 80] W: Failed to fetch http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu/dists/raring/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu/dists/raring/main/binary-i386/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/amith/ubuntutools/ubuntu/dists/raring/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/amith/ubuntutools/ubuntu/dists/raring/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old`
How can I fix this? It happens every time i run sudo apt-get update?