$ sudo yum install php 読み込んだプラグイン:fastestmirror Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 不明なエラー" One of the configured repositories failed (不明), 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