오랫동안 방치했던 서버에 yum 명령어 실행했던 오류가 발생했다. yum install -y yum-utilsLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfileCould not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 알 수 없는 오류" One of the configured repositories failed (Unknown), and yum doesn't have enough c..