i use ubuntu 14.04. apt-get worked fine until recently. apt-get return failure message while using apt-get update:
failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/release.gpg connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/release.gpg connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/release.gpg connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/release.gpg connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/main/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/multiverse/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/restricted/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty/universe/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/main/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/multiverse/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/restricted/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-updates/universe/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/main/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/multiverse/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/restricted/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-backports/universe/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/source/sources connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/binary-amd64/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/binary-i386/packages connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/main/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/multiverse/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/restricted/i18n/translation-en connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/i18n/translation-en_us connection failed [ip: 115.28.122.210 80] failed fetch http://mirrors.aliyun.com/ubuntu/dists/trusty-security/universe/i18n/translation-en connection failed [ip: 115.28.122.210 80] index files failed download. have been ignored, or old ones used instead. i tried change source mirrors.163.com or main server. still failed. ping server shows connection ok:
$ ping mirrors.aliyun.com ping mirrors.aliyun.com (112.124.140.210) 56(84) bytes of data. 64 bytes 112.124.140.210: icmp_seq=1 ttl=54 time=12.5 ms 64 bytes 112.124.140.210: icmp_seq=2 ttl=54 time=12.2 ms 64 bytes 112.124.140.210: icmp_seq=3 ttl=54 time=13.5 ms does know how solve this? thanks
happened me once before, solved rebooting system, please, try rebooting system
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