1. 删除原有的RHEL yum
$ rpm -aq | grep yum|xargs rpm --erase –-nodeps
2. 下载 CentOS 5 yum
2.1 i386:
wget http://mirrors.163.com/centos/5/os/i386/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm
wget http://mirrors.163.com/centos/5/os/i386/CentOS/yum-metadata-parser-1.1.2-4.el5.i386.rpm
wget http://mirrors.163.com/centos/5/os/i386/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
wget http://mirrors.163.com/centos/5/os/i386/CentOS/python-iniparse-0.2.3-6.el5.noarch.rpm
2.2 x86_64:
wget http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm
wget http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-4.el5.x86_64.rpm
wget http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
wget http://mirrors.163.com/centos/5/os/x86_64/CentOS/python-iniparse-0.2.3-6.el5.noarch.rpm
3. 安装 CentOS5 yum
3.1 i386:
rpm -ivh python-iniparse-0.2.3-6.el5.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-4.el5.i386.rpm
rpm -ivh yum-3.2.22-40.el5.centos.noarch.rpm yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm (Must install both at the same time.)
3.2 x86_64:
rpm -ivh python-iniparse-0.2.3-6.el5.noarch.rpm (如果有冲突，先把已经安装的删除后再安装)
rpm -ivh yum-metadata-parser-1.1.2-4.el5.x86_64.rpm
rpm -ivh yum-3.2.22-40.el5.centos.noarch.rpm yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
4. 下载 CentOS6-Base-163.repo 到 /etc/yum.repos.d
cd /etc/yum.repos.d/
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
5. 替换‘$releasever’ 为 ’5′；替换$basesearch为x86_64在 CentOS6-Base-163.repo
vi CentOS6-Base-163.repo
6. 最后
yum clean all
yum makecache
yum search vim #测试