redhat6.8 配置使用centos的yum源【增加脚本，直接root下运行即可】

转载自http://qingwang.blog.51cto.com/505009/1551228

新安装了redhat6.8.安装后，登录系统，使用yum update 更新系统。提示：

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

无法更新。

redhat 默认自带的 yum 源需要注册，才能更新。我们想不花钱也可以更新，需要替换掉redhat的yum源。

1.检查是否安装yum包

查看RHEL是否安装了yum，若是安装了，那么又有哪些yum包：

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

yum-metadata-parser-1.0-8.fc6

yum-3.0.1-5.el5

yum-rhn-plugin-0.4.3-1.el5

yum-updatesd-3.0.1-5.el5

2 删除redhat自带的yum包

卸载上面显示的所有yum包：

[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps（不检查依赖，直接删除rpm包）

再用

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

[root@localhost ~]# 

查看，无信息显示表示已经卸载完成。

3.下载新的yum包。使用Centos6.8的yum包(需要注意的是以下的软件会升级，对应的小的版本号会有不同，如果无法下载，需要到http://mirrors.163.com/centos/6/os/i386/Packages/查看最新版本。

wgethttp://mirrors.163.com/centos/6/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm

wgethttp://mirrors.163.com/centos/6/os/i386/Packages/yum-3.2.29-81.el6.centos.noarch.rpm

wgethttp://mirrors.163.com/centos/6/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm

安装yum软件包

注意:单个的安装包可能会依赖其它包（例如yum和yum-fastestmirror会相互依赖），所以我们可以把所有这些包放在一起，用一行命令将它们同时安装即可：

rpm -ivh yum-metadata-parser-1.1.2-16.el6.i686.rpm yum-3.2.29-81.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm

4.更换yum源。使用163的源

cd /etc/yum.repos.d/

wgethttp://mirrors.163.com/.help/CentOS6-Base-163.repo

vim CentOS6-Base-163.repo

编辑文件，把文件里面的$releasever全部替换为版本号，即6(6.8中的6) 最后保存！或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可

#rhel-source.repo## The mirror system uses the connecting IP address of the client and the# update status of each mirror to pick mirrors that are updated to and# geographically close to the client.  You should use this for CentOS updates# unless you are manually picking other mirrors.## If the mirrorlist= does not work for you, as a fall back you can try the# remarked out baseurl= line instead.## [base]name=CentOS-6 - Base - 163.combaseurl=http://mirrors.163.com/centos/6/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #released updates[updates]name=CentOS-6 - Updates - 163.combaseurl=http://mirrors.163.com/centos/6/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful[extras]name=CentOS-6 - Extras - 163.combaseurl=http://mirrors.163.com/centos/6/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

注意原来的yum源配置文件是rhel-source.repo。这里把CentOS6-Base-163.repo替换掉rhel-source.repo。

mv rhel-source.repo rhel-source.repo.bakmv CentOS6-Base-163.repo rhel-source.repo

5.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

6.更新系统

yum update

脚本部分：

#!/bin/sh
rpm -qa|grep yum|xargs rpm -e --nodeps


wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm
wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-3.2.29-81.el6.centos.noarch.rpm
wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm


rpm -ivh yum-metadata-parser-1.1.2-16.el6.i686.rpm yum-3.2.29-81.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm
cd /etc/yum.repos.d/
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
if [ -e CentOS6-Base-163.repo ] ; then
    sed -i 's/\$releasever/6/g' CentOS6-Base-163.repo
fi
mv /etc/yum.repos.d/rhel-source.repo rhel-source.repo.bak
mv CentOS6-Base-163.repo rhel-source.repo
yum clean all
yum makecache
exit 0