我使用的是ubuntu 14.04。 apt-get直到最近一直运作良好。使用apt-get update时，apt-get将返回失败消息：
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/Release.gpg Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/Release.gpg Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/Release.gpg Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/Release.gpg Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/source/Sources Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/binary-amd64/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/binary-i386/Packages Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/i18n/Translation-en_US Connection failed [IP: 115.28.122.210 80]
Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/i18n/Translation-en Connection failed [IP: 115.28.122.210 80]
Some index files failed to download. They have been ignored, or old ones used instead.
我尝试将源更改为mirrors.163.com或主服务器。它仍然失败了。 Ping那些服务器显示连接正常：
$ ping mirrors.aliyun.com
PING mirrors.aliyun.com (112.124.140.210) 56(84) bytes of data.
64 bytes from 112.124.140.210: icmp_seq=1 ttl=54 time=12.5 ms
64 bytes from 112.124.140.210: icmp_seq=2 ttl=54 time=12.2 ms
64 bytes from 112.124.140.210: icmp_seq=3 ttl=54 time=13.5 ms
有谁知道如何解决这个问题？感谢
答案 0 :(得分：0)
曾经发生在我身上，但我只是重新启动系统解决了这个问题，请尝试重新启动系统