Whenever I do sudo apt-get update, Iget the following message:
How can I fix this?
Code:
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/main/source/Sources 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/source/Sources 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/source/Sources 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/source/Sources 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/binary-i386/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/binary-i386/Packages 404 Not Found
W: Failed to fetch http://il.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/binary-i386/Packages 404 Not Found