# file: /etc/yum.repos.d/CentOS-AppStream.repo [AppStream] name=CentOS-$releasever - AppStream baseurl=http://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial Copy # file: /etc/yum.repos.d/CentOS-Base.repo [BaseOS] name=CentOS-$releasever - Base baseurl=http://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial Copy # file: /etc/yum.repos.d/CentOS-Epel.repo [epel] name=CentOS-$releasever - Epel baseurl=http://mirrors.aliyun.com/epel/8/Everything/$basearch enabled=1 gpgcheck=0 Copy # file: /etc/yum.repos.d/CentOS-Media.repo [c8-media-BaseOS] name=CentOS-BaseOS-$releasever - Media baseurl=file:///media/CentOS/BaseOS/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial [c8-media-AppStream] name=CentOS-AppStream-$releasever - Media baseurl=file:///media/CentOS/AppStream/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial 注：CentOS-Media 配置需要將光盤掛載至/media/CentOS路徑，否則在使用時會報錯。 然后執行如下命令： Copy dnf clean all # 清除所有的緩存文件 dnf makecache # 制作元數據緩存