redhat6.4 配置使用centos的yum源

sunny03

　　新安装了redhat6.4.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 Desktop]# rpm -qa |grep yum

　　PackageKit-yum-0.5.8-21.el6.x86_64
　　yum-3.2.29-40.el6.noarch
　　yum-plugin-security-1.1.30-14.el6.noarch
　　PackageKit-yum-plugin-0.5.8-21.el6.x86_64
　　yum-rhn-plugin-0.9.1-43.el6.noarch
　　yum-utils-1.1.30-14.el6.noarch
　　yum-metadata-parser-1.1.2-16.el6.x86_64
　　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Centos6.6的yum包
# wget http://mirrors.163.com/centos/6.6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm# wget http://mirrors.163.com/centos/6.6/os/x86_64/Packages/yum-3.2.29-60.el6.centos.noarch.rpm# wget http://mirrors.163.com/centos/6.6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm　　4.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.x86_64.rpm yum-3.2.29-60.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
　　5.更换yum源。使用163的源
# cd /etc/yum.repos.d/# wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo# vi CentOS6-Base-163.repo　　编辑文件，把文件里面的$releasever全部替换为版本号，即6.6 最后保存！或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可
# CentOS-Base.repo## The mirror system uses the connecting IP address of the client and the# update status of each mirror to pick mirrors that are updated to and# geographically close to the client.  You should use this for CentOS updates# unless you are manually picking other mirrors.## If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead.##[base]name=CentOS-6.6 - Base - 163.combaseurl=http://mirrors.163.com/centos/6.6/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.6&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #released updates [updates]name=CentOS-6.5 - Updates - 163.combaseurl=http://mirrors.163.com/centos/6.6/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.6&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful[extras]name=CentOS-6.5 - Extras - 163.combaseurl=http://mirrors.163.com/centos/6.6/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.6&arch=$basearch&repo=extrasgpgcheck=1　　gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
　　
　　
#additional packages that extend functionality of existing packages[centosplus]name=CentOS-6.5 - Plus - 163.combaseurl=http://mirrors.163.com/centos/6.6/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.6&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #contrib - packages by Centos Users[contrib]name=CentOS-6.5 - Contrib - 163.combaseurl=http://mirrors.163.com/centos/6.6/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.6&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6　　6.清除原有缓存
　　# yum clean all
　　7.重建缓存，以提高搜索安装软件的速度
　　# yum makecache
　　8.更新系统
　　# yum update