Ubuntu使用国内源出现Hash Sum mismatch错误的解决
<p>我们在更新Ubuntu软件源为国内源（比如163）之后，update出现下面这样的错误：</p>
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W: Failed to fetch bzip2:/var/lib/apt/lists/partial/mirrors.163.com_ubuntu_dists_trusty-security_main_source_Sources Hash Sum mismatch</p>
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E: Some index files failed to download. They have been ignored, or old ones used instead.</p>
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<p>
这是由于GFW的原因，我们获取到的文件和官方源上的文件大小不一致，导致md5值也不一样，所以会出现Hash Sum mismatch。我们可以通过设置代理的方式解决这个问题。</p>
<p>
网上的解决方法挺多的：</p>
<p>
（1）我是用这个方法解决的 </p>
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<code class="bash functions">sudo</code> <code class="bash plain">apt-get clean </code>
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<code class="bash functions">sudo</code> <code class="bash plain">apt-get update --fix-missing</code>
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（2）删掉/var/lib/apt/lists 这个目录下的东西</p>
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<code class="bash comments"># 删除 </code>
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<code class="bash functions">sudo</code> <code class="bash functions">rm</code> <code class="bash plain">-fR </code><code class="bash plain">/var/lib/apt/lists/</code><code class="bash plain">* </code>
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<code class="bash comments"># 新建相应文件夹 </code>
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<code class="bash functions">sudo</code> <code class="bash functions">mkdir</code> <code class="bash plain">/var/lib/apt/lists/partial</code>
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<code class="bash comments"># 重新update </code>
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<code class="bash functions">sudo</code> <code class="bash plain">apt-get update</code>
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（3）换源。</p>
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好像是从ubuntu11.04开始，换源都可以在system settings里面直接操作了，不用命令行那么麻烦了。。。</p>
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ps：在天朝的话，如果是校园网的，就找个edu.cn的源；如果不是校园网的话，我个人用着163的mirror觉得还不错。</p>
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更简单的方法，我们可以使用aliyun的软件源，我换了之后就没再出现过这个问题了。</p>
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<code class="plain plain">deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse</code>
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<code class="plain plain">deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse</code>
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<code class="plain plain">deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse</code>
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<code class="plain plain">deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse</code>
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<code class="plain plain">deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse</code>
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<code class="plain plain">deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse</code>
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<code class="plain plain">deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse</code>
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<code class="plain plain">deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse</code>
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<code class="plain plain">deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse</code>
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<code class="plain plain">deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse</code>
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<p>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。</p>
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原文链接：https://blog.csdn.net/wangtaoking1/article/details/49125289</p>
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