[root@reddhat6_155_201 ~]# rpm -qa |grep yum

yum-rhn-plugin-0.9.-.el6.noarch

yum-utils-1.1.-.el6.noarch

PackageKit-yum-plugin-0.5.-.el6.x86_64

yum-3.2.-.el6.noarch

yum-metadata-parser-1.1.-.el6.x86_64

PackageKit-yum-0.5.-.el6.x86_64

yum-plugin-security-1.1.-.el6.noarch

[root@reddhat6_155_201 ~]# rpm -qa|grep yum|xargs rpm -e --nodeps

[root@reddhat6_155_201 ~]# mkdir package

[root@reddhat6_155_201 ~]# cd package

[root@reddhat6_155_201 package]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm

[root@reddhat6_155_201 package]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

[root@reddhat6_155_201 package]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm

[root@reddhat6_155_201 package]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

[root@reddhat6_155_201 package]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm



#以上rpm下载可能会出现404,可以直接去http://mirrors.163.com/centos/6/os/x86_64/Packages/下查看具体的版本及下载地址

[root@reddhat6_155_201 package]# rpm -ivh python-iniparse-0.3.-2.1.el6.noarch.rpm

[root@reddhat6_155_201 package]# rpm -ivh yum-metadata-parser-1.1.-.el6.x86_64.rpm

[root@reddhat6_155_201 package]# rpm -ivh --force python-urlgrabber-3.9.-.el6.noarch.rpm   #注意该RPM包安装方式的区别

[root@reddhat6_155_201 package]# rpm -ivh yum-3.2.-.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.-.el6.noarch.rpm

[root@reddhat6_155_201 package]# cd /etc/yum.repos.d/ &&  rm -f *.repo

[root@reddhat6_155_201 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo    http://mirrors.aliyun.com/repo/Centos-6.repo && wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-6.repo

[root@reddhat6_155_201 yum.repos.d]# sed -i 's/$releasever/6/g'  CentOS-Base.repo

[root@reddhat6_155_201 yum.repos.d]# sed -i 's/$basearch/x86_64/g' CentOS-Base.repo
[root@reddhat6_155_201 yum.repos.d]# sed -i 's/$basearch/x86_64/g' epel-6.repo
[root@reddhat6_155_201 yum.repos.d]# yum clean all && yum makecache fast

echo "unset MAILCHECK">> /etc/profile   && source /etc/profile && cat /dev/null > /var/spool/mail/root