centos中yum命令删除还原的补救方法介绍
<p><span><strong>前言</strong></span></p>
<p>
yum，是Yellow dog Updater Modified的简称，起初是由yellow dog这一发行版的开发者Terra Soft研发，用python写成，那时还叫做yup(yellow dog updater)，后经杜克大学的Linux@Duke开发团队进行改进，遂有此名。yum的宗旨是自动化地升级，安装/移除rpm包，收集rpm包的相 关信息，检查依赖性并自动提示用户解决。yum的关键之处是要有可靠的repository，顾名思义，这是软件的仓库，它可以是http或ftp站点， 也可以是本地软件池，但必须包含rpm的header， header包括了rpm包的各种信息，包括描述，功能，提供的文件，依赖性等.正是收集了这些 header并加以分析，才能自动化地完成余下的任务。</p>
<p>
由于服务器centos6.8安装mysql一直出现不能连接问题,然后看到一个方法，一不小心就把yum给删除了，都还原不了，很是绝望，很难受。然后没有yum这个centos就感觉废了，然后找方法装上去。</p>
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<code class="bash plain">python --version查看python 版本</code>
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<code class="bash spaces"> </code><code class="bash functions">whereis</code> <code class="bash plain">python 查看python文件</code>
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<code class="bash plain">python: </code><code class="bash plain">/usr/bin/python2</code><code class="bash plain">.6 </code><code class="bash plain">/usr/bin/python</code> <code class="bash plain">/usr/lib</code> <code class="bash plain">/python2</code><code class="bash plain">.7 </code><code class="bash plain">/usr/lib/python2</code><code class="bash plain">.6 </code><code class="bash plain">/usr/lib64/python2</code><code class="bash plain">.7 </code><code class="bash plain">/usr/lib64/python2</code><code class="bash plain">.6 </code><code class="bash plain">/usr/include/python2</code><code class="bash plain">.7 </code><code class="bash plain">/usr/share/man/man1/python</code><code class="bash plain">.1.gz</code>
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centos6.8基本底层python是python2.6， centos7是2.7，我的是centos6.8</p>
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<span><strong>解决办法</strong></span></p>
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<strong>方法一：</strong></p>
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这个网友解决的方法，记录一下</p>
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<code class="bash plain">$ rpm -qa | </code><code class="bash functions">grep</code> <code class="bash plain">python- | </code><code class="bash functions">grep</code> <code class="bash plain">2.6</code>
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<code class="bash plain">$ </code><code class="bash functions">sudo</code> <code class="bash plain">rpm -ivh --force --nodeps </code><code class="bash functions">ftp</code><code class="bash plain">:</code><code class="bash plain">//mirror</code><code class="bash plain">.switch.ch</code><code class="bash plain">/pool/4/mirror/scientificlinux/6</code><code class="bash plain">.5</code><code class="bash plain">/x86_64/updates/fastbugs/python-2</code><code class="bash plain">.6.6-52.el6.x86_64.rpm</code>
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解决问题，yum可以使用，原理估计是python回滚到默认的2.6</p>
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<strong>方法二 ：</strong></p>
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这个我的解决方法</p>
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http://mirrors.163.com/centos/6/os/x86_64/Packages/</p>
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1、 到上面这个网站去下载如下RPM包</p>
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<code class="bash plain">python-iniparse-0.3.1-2.1.el6.noarch.rpm</code>
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<code class="bash plain">yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm </code>
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<code class="bash plain">yum-3.2.29-69.el6.centos.noarch.rpm</code>
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<code class="bash plain">yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm</code>
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2、 下载完成之后，用rpm命令进行安装，如下：</p>
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<code class="bash plain">rpm -ivh --force --nodeps python-iniparse-0.3.1-2.1.el6.noarch.rpm</code>
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<code class="bash plain">rpm -ivh --force --nodeps yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm </code>
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<code class="bash plain">rpm -ivh --force --nodeps yum-3.2.29-69.el6.centos.noarch.rpm </code>
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<code class="bash plain">yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm</code>
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3、到 http://yum.baseurl.org/wiki</p>
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下载yum-3.4.3.tar.gz ，放到你指定的目录下解压，解压命令如下：</p>
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<code class="bash functions">tar</code> <code class="bash plain">-zxvf yum-3.4.3.</code><code class="bash functions">tar</code><code class="bash plain">.gz </code><code class="bash comments">#解压后进到yum-3.4.3目录</code>
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4、输入./yummain.py update</p>
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完成之后，输入yum 解决问题</p>
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<span><strong>注意</strong></span></p>
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在下载上面的安装包的时候注意自己的centos的版本和这个安装包的对应性，不然也是没用的。</p>
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<span><strong>总结</strong></span></p>
<p>
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。</p>
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<strong>参考</strong></p>
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http://blog.sina.com.cn/s/blog_4cbf97060100u2zb.html</p>
<p>
http://blog.csdn.NET/u011531010/article/details/53528054</p>
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http://blog.sina.com.cn/s/blog_643754960102w82m.html</p>
<p>
http://stackoverflow.com/questions/17490921/no-module-named-rpm-when-i-call-yum-on-shell<br>
http://blog.csdn.net/u011832895/article/details/53735198</p>
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原文链接：http://blog.csdn.net/sihai12345/article/details/73381628</p>
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