https://heary.cn/posts/CentOS-yum-Error-Failed-to-download-metadata-for-repo-appstream-%E9%97%AE%E9%A2%98%E8%A7%A3%E5%86%B3/
本文介绍CentOS 8在使用yum update更新时，遭遇报错：Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist 的解决方法。
https://heary.cn/posts/CentOS-yum-Error-Failed-to-download-metadata-for-repo-appstream-%E9%97%AE%E9%A2%98%E8%A7%A3%E5%86%B3/
本文介绍CentOS 8在使用yum update更新时，遭遇报错：Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist 的解决方法。