Docker docker 中，ubuntu14.04 中 apt-get update 失败，该如何解决 (试了 n 多网上的方法，还是不行)
黑山老妖
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October 29, 2018
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758 hits
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W: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/dists/xenial-updates/restricted/binary-amd64/Packages Connection failed
W: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/dists/xenial-updates/universe/binary-amd64/Packages Connection failed
E: Some index files failed to download. They have been ignored, or old ones used instead.
这种错误，网上说的都是源的问题，但是按照上面方法修改一直都不 ok。有最近遇到过这个问题并解决了的吗
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