#!/bin/bashrpm -aq|grep yum|xargs rpm -e --nodeps wget http://mirrors.aliyun.com/centos/6/os/x86_64/Packages/yum-3.2.29-69.el6.centos.noarch.rpmwget http://mirrors.aliyun.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpmwget http://mirrors.aliyun.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpmwget http://mirrors.aliyun.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpmrpm -qa | grep yum | xargs rpm -e --nodepsrpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpmrpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpmrpm -ivh yum-3.2.29-69.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm which yumyum versionyum clean all  && yum makecache