Centos 重新安装python和yum

1. 卸载python

rpm -qa|grep python|xargs rpm -e --allmatches --nodeps

whereis python|xargs rm -fr

2. 卸载yum

rpm -qa|grep yum|xargs rpm -e --allmatches --nodeps

rm -rf /etc/yum.repos.d/*

whereis yum|xargs rm -fr

3. 安装python

mkdir /usr/local/src/python
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-2.6.6-66.el6_8.x86_64.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-pycurl-7.19.0-9.el6.x86_64.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-devel-2.6.6-66.el6_8.x86_64.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-libs-2.6.6-66.el6_8.x86_64.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/rpm-python-4.8.0-55.el6.x86_64.rpm
rpm -ivh python-*   #rpm-python-* 

如果中间过程出现了类似下面的代码，这是包与包之间的依赖关系，只需要卸载已经安装的包（rpm -e 包名（没有.rpm后缀）），然后先安装依赖包
如：
      rpm -e yum-metadata-parser-1.1.2-16.el6.x86_64
      rpm -ivh /yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

4. 安装yum

mkdir /usr/local/src/yum
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm  
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm  
wget http://mirrors.163.com/centos/6.9/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm
rpm -ivh yum-*

5. 完成

yum