新しいCent-OS 7をインストールしますが、更新または新しいパッケージを取得したいときにこのエラーが発生します。 Loaded plugins: fastestmirror, langpacks One of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository …