Redhat7.2配置免费yum源（简单五步轻松搞定）
步骤一：清除redhat原有的yum源步骤二：下载163的yum包
wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm
wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
步骤三：安装下载的yum包
步骤四：创建文件/etc/yum.repos.d/rhel-Base.repo并写入（复制我的即可）
name=CentOS-$releasever - Basebaseurl=http://mirrors.163.com/centos/7.2.1511/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7#released updates
name=CentOS-$releasever - Updatesbaseurl=http://mirrors.163.com/centos/7.2.1511/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
name=CentOS-$releasever - Extrasbaseurl=http://mirrors.163.com/centos/7.2.1511/extras//$basearch/gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
name=CentOS-$releasever - Plusbaseurl=http://mirrors.163.com/centos/7.2.1511/centosplus//$basearch/gpgcheck=1
enabled=0
步骤五：清理yum缓存和测试yum
如图，正在更新，表示配置成功。
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