大家好，我最近安装了 ubunt 10.04，我想升级到 11.04（我的闪存驱动器非常小，只能获得 10.04，所以我想继续升级）但我一直无法获取，现在我是 ubuntu 新手，所以如果你们能帮忙就太好了
错误信息 ：
W:Failed to fetch extras.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found
W:Failed to fetch extras.ubuntu.com/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/universe/source/Sources.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/main/source/Sources.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/restricted/source/Sources.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch security.ubuntu.com/ubuntu/dists/maverick-security/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.149 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/restricted/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/universe/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/main/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/restricted/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/universe/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W:Failed to fetch us.archive.ubuntu.com/ubuntu/dists/maverick-updates/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
E:Some index files failed to download, they have been ignored, or old ones used instead.
也感谢你们，如果你们能给出解决这个问题的说明，因为我是个白痴，我会很感激，谢谢<3
答案1
您使用的版本非常旧。Ubuntu 10.04 不再支持 LTS 并且已被弃用。您应该使用较新的版本。您可以在此处获取最新版本：
您可以在此处参考每个版本的发布和支持状态：