---

# 1. Backup and remove old configurations
mkdir -p /etc/yum.repos.d/backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/ 2>/dev/null

# 2. Download the correct Aliyun Vault configuration (HTTP only)
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

# 3. Force HTTP protocol (disable HTTPS)
sed -i 's/^mirrorlist/#mirrorlist/' /etc/yum.repos.d/CentOS-Base.repo
sed -i 's|^#baseurl=http://mirror.centos.org|baseurl=http://mirrors.aliyun.com/centos-vault/7.9.2009|' /etc/yum.repos.d/CentOS-Base.repo
sed -i 's|https://|http://|g' /etc/yum.repos.d/CentOS-Base.repo

# 4. Clean cache and test
yum clean all
yum makecache