备份现有仓库配置
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
下载腾讯云镜像配置文件
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.tencent.com/repo/centos7_base.repo
强制使用 HTTPS 协议
sed -i 's|http://|https://|g' /etc/yum.repos.d/CentOS-Base.repo
添加 CentOS 7 Vault 仓库（解决 EOL 问题）
tee /etc/yum.repos.d/centos-vault.repo <<-'EOF'
[vault]
name=CentOS-7 - Vault
baseurl=https://mirrors.tencent.com/centos-vault/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.tencent.com/centos/RPM-GPG-KEY-CentOS-7
enabled=1
EOF
设置 IPv4 优先
sh -c 'echo "ip_resolve=4" >> /etc/yum.conf'
清理缓存并重建元数据
yum clean all
rm -rf /var/cache/yum/*
yum makecache
测试安装 wget
yum install -y wget
验证安装
wget --version
