我在更新时遇到问题。问题是 raring-backports 不可用http://ftp.iinet.net.au：
Err http://ftp.iinet.net.au raring-backports/main amd64 Packages
404 Not Found
Err http://ftp.iinet.net.au raring-backports/restricted amd64 Packages
404 Not Found
Err http://ftp.iinet.net.au raring-backports/universe amd64 Packages
404 Not Found
Get: 18 http://ppa.launchpad.net trusty/main i386 Packages [5,636 B]
Ign http://extras.ubuntu.com trusty/main Translation-en_AU
Err http://ftp.iinet.net.au raring-backports/main i386 Packages
404 Not Found
Err http://ftp.iinet.net.au raring-backports/restricted i386 Packages
404 Not Found
Err http://ftp.iinet.net.au raring-backports/universe i386 Packages
404 Not Found
因此，我收到以下错误消息：
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/main/binary-amd64/Packages: 404 Not Found
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/restricted/binary-amd64/Packages: 404 Not Found
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/universe/binary-amd64/Packages: 404 Not Found
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/main/binary-i386/Packages: 404 Not Found
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/restricted/binary-i386/Packages: 404 Not Found
W: Failed to fetch http://ftp.iinet.net.au/pub/ubuntu/dists/raring-backports/universe/binary-i386/Packages: 404 Not Found`
我在 Web 浏览器上检查发现这些 URL 不存在。有谁知道还有什么其他存储库可以替代它们吗？
也许很高兴让你知道我正在使用 lubuntu 14.04：
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
以及source.list中的相关行：
deb http://ftp.iinet.net.au/pub/ubuntu/ raring-backports main restricted universe
答案1
raring-backports适用于 Ubuntu 13.04“Raring Ringtail”，因此您不再需要它。
对于 14.04 来说trusty-backports：
deb http://ftp.iinet.net.au/pub/ubuntu/ trusty-backports main restricted universe
如果你已经有了条目，trusty-backports你可以删除raring-backports