RHEL6.4更改yum源

第一步：删除默认的yum源。命令如下
rpm-aq | grep yum|xargs rpm -e--nodeps

第二步：下载最新的yum安装包

wget http://vault.centos.org/6.4/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
wget http://vault.centos.org/6.4/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
wget http://vault.centos.org/6.4/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm
wget http://vault.centos.org/6.4/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

第三步：安装yum相关软件。
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-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

第四步：更改yum源，我们使用网易的镜像源，可以去这里http://mirrors.163.com/.help/centos.html 下载最新的CentOS-Base.repo文件，然后cp到/etc/yum.repos.d/目录下，修改把文件里面的$releasever全部替 换为版本号，即6 最后保存。最后把这个文件命名为rhel-source.repo，替换掉原来该目录的同名文件。

第五步：清理yum缓存
yum clean all
yum makecache
最后显示如下，更换yum源成功

# 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-6.4 - Base - 163.com
baseurl=http://vault.centos.org/6.4/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates 
[updates]
name=CentOS-6.4 - Updates - 163.com
baseurl=http://vault.centos.org/6.4/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-6.4 - Extras - 163.com
baseurl=http://vault.centos.org/6.4/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6.4 - Plus - 163.com
baseurl=http://vault.centos.org/6.4/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-6.4 - Contrib - 163.com
baseurl=http://vault.centos.org/6.4/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6