当我尝试更新我的 14.04 ubuntu 时它排序
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://it.archive.ubuntu.com/ubuntu/dists/natty-backports/main/source/Sources 404 Not Found [IP: 193.206.139.34 80]
, W:Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/source/Sources 404 Not Found [IP: 193.206.139.34 80]
, W:Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/source/Sources 404 Not Found [IP: 193.206.139.34 80]
, W:Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/source/Sources 404 Not Found [IP: 193.206.139.34 80]
, E:Some index files failed to download. They have been ignored, or …updates ×1