Redhat5-64bit yum源修改为CentOS的yum源问题

解决方案：
1.卸载redhat自带的yum组件

[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps
2.安装centos的yum包
[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm
[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-3.2.22-39.el5.centos.noarch.rpm

root@localhost ~]# rpm -ivh yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm --nodeps
[root@localhost ~]# rpm -ivh yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm --nodeps
[root@localhost ~]# rpm -ivh yum-3.2.22-39.el5.centos.noarch.rpm --nodeps
3. 下载更新源，并存放在系统目录中

[root@localhost ~]# wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo
[root@localhost ~]# mv CentOS_Base.repo /etc/yum.repos.d/
4.生成缓存并进行安装

[root@localhost ~]# yum makecache