刚安装完RHEL6以后直接yum命令得到如下所示的找不到匹配项的结果：
操作步骤：
1.删除redhat原有的yum及相关软件包
rpm -aq|grep yum|xargs rpm -e --nodeps
rpm -qa |grep python-urlgrabber|xargs rpm -e --nodeps
2.下载yum安装文件
注意，如果下载时找不到文件，就登录到：http://mirrors.163.com/centos/6/os/x86_64/ 上查找相应的文件。然后再下载,部分rpm包版本可能有所不同，如果报404可到http://mirrors.163.com/centos/6/os/x86_64/Packages/搜索包名即可。
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-69.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-1.1.30-30.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/python-urlgrabber-3.9.1-11.el6.noarch.rpm
我的做法是直接到http://mirrors.163.com/centos/6/os/x86_64/Packages/搜索相关的5个包。
3.进行安装yum
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 python-urlgrabber-3.9.1-11.el6.noarch.rpm
rpm -ivh yum-3.2.29-60.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
注意最后两个包必需同时安装，否则会相互依赖，如果出现“python-urlgrabber >= 3.9.1-10 is needed by”则要安装python-urlgrabber-3.9.1-11.el6.noarch.rpm
－－－－－－－－－－配置网易源
4.更新repo文件
mv /etc/yum.repos.d/rhel-source.repo /etc/yum.repos.d/rhel-source.repo.bak
vi /etc/yum.repos.d/rhel-debuginfo.repo
内容为：
[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/6/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/6/os/x86_64/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/6/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/6/os/x86_64/RPM-GPG-KEY-CentOS-6
#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever - Addons
#baseurl=http://mirrors.163.com/centos/6/addons/$basearch/
#gpgcheck=1
#gpgkey=http://mirrors.163.com/centos/6/os/x86_64/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/6/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/6/os/x86_64/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/6./centosplus/$basearch/
gpgcheck=1
enabled=0
5、yum clean all
6、yum install vim（测试一下）如果出现
Errno 14] PYCURL ERROR 6 - 'Couldn't resolve host 'mirrors.163.com'错误则
修改一下 /etc/resolv.conf
添加一个nameserver 8.8.8.8完成