RedHat7 如何更换yum镜像源

RedHat7如何更换yum镜像源？

# 删除系统自带 yum
rpm -qa|grep -e yum -e python-urlgrabber |xargs rpm -e --nodeps

# 下载yum与wget的rpm软件包
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm 
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm 
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm 
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm 
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-10.el7.noarch.rpm 
curl -O http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/wget-1.14-18.el7_6.1.x86_64.rpm


# 由于软件包依赖问题，请务必根据如下顺序，进行rpm安装
rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
rpm -ivh python-urlgrabber-3.10-10.el7.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm yum-3.4.3-168.el7.centos.noarch.rpm
rpm -ivh wget-1.14-18.el7_6.1.x86_64.rpm

# 下载阿里镜像源配置文件
mv /etc/yum.repos.d/* /tmp/
wget -O /etc/yum.repos.d/redhat.repo https://mirrors.aliyun.com/repo/Centos-7.repo
sudo sed -i.bak 's/\$releasever/7/g' /etc/yum.repos.d/redhat.repo

# 安装vim测试yum是否可以正常使用
yum install -y vim