首先 rpm -qa|grep yum 查看 yum 服务相关的包

# rpm -qa|grep yum

yum-security-1.1.16-13.el5_4.1

yum-3.2.22-33.el5

yum-updatesd-0.9-2.el5

yum-metadata-parser-1.1.2-3.el5

# rpm -qa|grep yum|xargs rpm -e --nodeps

强制删除这一些包

下载CentOS yum 服务相关的 rpm 包

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-3.2.22-39.el5.centos.noarch.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm

# rpm -ivh yum-*

warning: yum-3.2.22-39.el5.centos.noarch.rpm: Header V3 DSA signature: NOKEY, key ID e8562897

Preparing... ########################################### [100%]

1:yum-metadata-parser ########################################### [ 33%]

2:yum-fastestmirror ########################################### [ 67%]

3:yum ########################################### [100%]

哦了，安装完毕，现在进入系统的yum目录

# cd /etc/yum.repos.d/

# mv rhel-debuginfo.repo rhel-debuginfo.repo.bakup

# mv rhel-source.repo rhel-source.repo.bakup

# wget http://www.codesky.net/files/2011/05/06/CentOS-Base.repo (下载CentOS的repo包)

# yum makecache

等待 yum 库更新完毕，就可以 yum 安装软件了

ITPub博客

YUM配置

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