步驟1：清空python
rpm -qa|grep python|xargs rpm -e --allmatches --nodeps

whereis python|xargs rm -fr

步驟2：清空yum
rpm -qa|grep yum|xargs rpm -e --allmatches --nodeps

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

whereis yum|xargs rm -fr

步驟3：安裝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

步驟4：|rpm安裝包
rpm -ivh python-* rpm-python-*

步驟5：

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

步驟6：安裝rpm包

rpm -ivh yum-*

centos6.x安裝yum及python依賴包