cd /etc/yum.repos.d/
vim CentOS-Stream-AppStream.repo //切换到阿里云源
baseos name=CentOS Stream 9 - BaseOS baseurl=https://mirrors.aliyun.com/centos-stream/9-stream/BaseOS/x86_64/os/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official enabled=1 appstream name=CentOS Stream 9 - AppStream baseurl=https://mirrors.aliyun.com/centos-stream/9-stream/AppStream/x86_64/os/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official enabled=1 crb name=CentOS Stream 9 - CRB baseurl=https://mirrors.aliyun.com/centos-stream/9-stream/CRB/x86_64/os/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official enabled=1
保存后
yum clean all && yum makecache
可以安装了