RedHat8、9一键配置脚本（华为Rocky9+epel源）：

#!/bin/bash
#仅兼容RedHat8、9
uname -a
cat /etc/redhat-release


yum remove -y subscription-manager subscription-manager-rhsm-certificates
cat > /etc/yum.repos.d/Rocky_epel.repo << 'EOF'
[baseos]
name=Rocky Linux $releasever - BaseOS
baseurl=https://mirrors.huaweicloud.com/rockylinux/$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
countme=1
gpgkey=https://mirrors.huaweicloud.com/rockylinux/RPM-GPG-KEY-Rocky-9

[appstream]
name=Rocky Linux $releasever - AppStream
baseurl=https://mirrors.huaweicloud.com/rockylinux/$releasever/AppStream/$basearch/os/
gpgcheck=1
enabled=1
countme=1
gpgkey=https://mirrors.huaweicloud.com/rockylinux/RPM-GPG-KEY-Rocky-9

[extras]
name=Rocky Linux $releasever - Extras
baseurl=https://mirrors.huaweicloud.com/rockylinux/$releasever/extras/$basearch/os/
gpgcheck=1
enabled=1
countme=1
gpgkey=https://mirrors.huaweicloud.com/rockylinux/RPM-GPG-KEY-Rocky-9

[epel]
name=Extra Packages for Enterprise Linux $releasever - $basearch
baseurl=https://mirrors.huaweicloud.com/epel/$releasever/Everything/$basearch/
enabled=1
gpgcheck=1
countme=1
gpgkey=https://mirrors.huaweicloud.com/epel/RPM-GPG-KEY-EPEL-$releasever
EOF


yum clean all && yum makecache
yum -y install yum-utils

RedHat7一键配置脚本（阿里CentOS7+epel源）：

#!/bin/bash
#仅兼容RedHat7

uname -a
cat /etc/redhat-release
rpm -qa|grep yum

rpm -aq | grep yum | xargs rpm -e --nodeps
whereis yum && rm -rf /etc/yum   # 可提前打包备份目录

#下载安装CentOS7版YUM
mkdir ~/install-yum
wget https://www.itca.cc/file/install-yum.tar
tar -xvf install-yum.tar -C ~/install-yum

cd ~/install-yum
rpm -ivh python-urlgrabber*
rpm -ivh python-iniparse*
rpm -ivh yum*

#配置Repo源
wget -O /etc/yum.repos.d/CentOS-7.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo
sed -i 's/$releasever/7/g' /etc/yum.repos.d/CentOS-7.repo
sed -i 's/$releasever/7/g' /etc/yum.repos.d/epel-7.repo
yum clean all && yum makecache

#安装必备YUM插件
yum -y install yum-utils yum-langpacks yum-rhn-plugin PackageKit-yum