備份目錄/etc/yum.repos.d/下所有文件到其他目錄
baseurl爲網站內repodata文件夾所在路徑
[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/$releasever/$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
寫入/etc/yum.repos.d/epel.repo
/dev/sr0 /misc/cd iso9660 defaults 0 0寫入/etc/fstab實現光盤自動掛載
[c7-media]
name=CentOS-$releasever - Media
baseurl=file:///misc/cd/
gpgcheck=1
enabled=1
gpgkey=file:///misc/cd/RPM-GPG-KEY-CentOS-7
寫入/etc/yum.repos.d/CentOS-Media.repo