CentOS 6.4升级Python导致yum无法使用怎么办?

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  在CentOS系统操作中,在升级Python的时候出现yum不可用的情况,而yum又是比较重要的软件,遇到这种问题要如何处理呢?下面小编就给大家介绍下CentOS 6.4升级Python导致yum不可用的解决方法。

  1、查看当前系统python的版本

  1python -V

  2、下载2.7.3版本的Python

  1wget https://python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2

  3、解压和安装

  tar -jxvf Python-2.7.3.tar.bz2

  #进入解压后的目录

  cd Python-2.7.3

  #编译和安装

  。/configure

  make

  make install

  4.查看是否安装成功

  /usr/local/bin/python2.7 -V

  #如果出现如下信息代表安装成功

  Python 2.7.3

  5、建立软链接

  #正常情况下即使python2.7安装成功后,系统默认指向的python仍然是2.6.6版本,考虑到yum是基于python2.6.6才能正常工作,所以不建议卸载。

  #采用下面的方法把系统默认的python修改为2.7.3版本

  mv /usr/bin/python /usr/bin/python2.6.6

  ln -s /usr/local/bin/python2.7 /usr/bin/python

  #检测是否成功

  python -V

  #出现2.7.3版本信息代表成功

  Python 2.7.3

  6、解决修改完系统默认python版本后yum不可用的问题

  #修改yum文件

  vi /usr/bin/yum

  将文件头部的

  #!/usr/bin/python

  改为如下内容

  #!/usr/bin/python2.6.6

  整个升级过程完成了。

  7、其他问题

  经过上面6步的操作本来yum是可用了,但是不知道哪位牛人又修改了系统的什么文件,导致使用yum的时候还是提示 no named yum的错误提示。经过查阅资料得知都是让修改yum的头部python的版本。

  但是我已经修改过了(步骤6),不知道怎么解决了。最后放弃了“度娘”采用经常被和谐的Google,在Centos官网上查到了一篇文档,方法如下。

  首先找到你安装Centos的光盘或者ISO文件,只要系统版本一样即可。拷贝如下文件到系统中:

  python-2.6.6-36.el6.x86_64.rpm

  python-urlgrabber-3.9.1-8.el6.noarch.rpm

  python-devel-2.6.6-36.el6.x86_64.rpm

  python-libs-2.6.6-36.el6.x86_64.rpm

  yum-3.2.29-40.el6.centos.noarch.rpm

  具体版本号,根据你系统盘或者ISO提供为准。我是拷贝到了如下目录

  /usr/local/src/Python-2.6.6

  执行安装

  cd /usr/local/src/Python-2.6.6/

  rpm -Uvh --replacepkgs *.rpm

  #出现如下提示

  Preparing.。。 ########################################### [100%]

  1:python-libs ########################################### [ 20%]

  2:python ########################################### [ 40%]

  3:python-urlgrabber ########################################### [ 60%]

  4:yum ########################################### [ 80%]

  5:python-devel ########################################### [100%]

  执行yum命令,你熟悉的界面出现了。

  上面就是CentOS 6.4升级Python导致yum无法使用的解决方法的相关介绍了,毕竟重装yum比较麻烦,且不一定可行,可使用本文介绍的方法进行修复。

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