vim /etc/yum.repos.d/AppStream.repo

[AppStream]

name=AppStream

baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/8.0.1905/AppStream/$basearch/os/

gpgcheck=0

enabled=1

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-Official

vim /etc/yum.repos.d/BaseOS.repo

[BaseOS]

name=BaseOS

baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/8.0.1905/BaseOS/$basearch/os/

gpgcheck=0

enabled=1

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-Official

配置后yum clean all && yum makecache 一下。

關鍵詞：為 repo 'appstream' 下載元數據失敗