redHat更新yum源

1. 网易镜像仓库查找相关rpm 包并下载 ：http://mirrors.163.com/centos/6/os/x86_64/Packages/

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/rpm-4.8.0-59.el6.x86_64.rpm

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm

2.安装下载的rpm包

rpm2cpio rpm-4.8.0-59.el6.x86_64.rpm | cpio -idmv

rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm

rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm

rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

rpm -ivh yum-3.2.29-81.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm

3.修改配置。

cd /etc/yum.repos.d/

下载centos配置文件：

wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo

备份+改名：

mv rhel-source.repo rhel-source.repo.bak
mv CentOS6-Base-163.repo CentOS-Base.repo

 修改配置：

vim CentOS-Base.repo

替换内容;

:1,$s/$releasever/6

清除原有缓存：

yum clean all

重建缓存，以提高搜索安装软件的速度：

yum makecache

更新系统：

yum update