1、首先删除redhat原有的yum ，因为redhat 原本的yum 没有注册为redhat用户是用不了的。
rpm -aq|grep yum|xargs rpm -e --nodeps rpm -aq|grep python-iniparse|xargs rpm -e --nodeps
2、下载163yum源包
这里需要查看版本号和系统类别：(参考 Linux下 RabbitMQ的安装与配置-3）
cat /etc/redhat-release
arch
然后找到对应的yum源（本人这里是百度的，实在不知道怎么查，有知道求分享）
wget http://mirrors.163.com/centos/7.3.1611/os/x86_64/Packages/yum-3.4.3-150.el7.centos.noarch.rpm wget http://mirrors.163.com/centos/7.3.1611/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm wget http://mirrors.163.com/centos/7.3.1611/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm wget http://mirrors.163.com/centos/7.3.1611/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-40.el7.noarch.rpm
3、安装下载的rpm包(也可以逐条安装）
rpm -ivh *.rpm
4、创建文件vim /etc/yum.repos.d/rhel-debuginfo.repo并写入（参考redhat7.3配置163 yum源）
[base] name=CentOS-$releasever - Base baseurl=http://mirrors.163.com/centos/7.3.1611/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/7.3.1611/os/x86_64/RPM-GPG-KEY-CentOS-7 #released updates [updates] name=CentOS-$releasever - Updates baseurl=http://mirrors.163.com/centos/7.3.1611/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/7.3.1611/os/x86_64/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-$releasever - Extras baseurl=http://mirrors.163.com/centos/7.3.1611/extras//$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/7.3.1611/os/x86_64/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS-$releasever - Plus baseurl=http://mirrors.163.com/centos/7.3.1611/centosplus//$basearch/ gpgcheck=1 enabled=0
6、 yum clean all
7、 yum update 测试。(时间稍长，需要确认)
8、 安装 epel 源
yum install epel-release