1、阿里雲yum源：curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
2、檢視系統版本：[root@localhost etc]# cat system-release
3、根據源選擇版本：20.03-LTS-SP1
4、清理yum源：yum clean all
5、安裝wget：yum install wget
6、檢視當前yum源：cat /etc/yum.repos.d/*.repo
7、更新yum makecache源
x2openEuler-core-3.0.0-20240125.x86_64.rpm
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo