yum源配置

备份目录/etc/yum.repos.d/下所有文件到其他目录

baseurl为网站内repodata文件夹所在路径

[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

写入/etc/yum.repos.d/epel.repo

/dev/sr0 /misc/cd iso9660 defaults 0 0写入/etc/fstab实现光盘自动挂载

[c7-media]

name=CentOS-$releasever – Media

baseurl=file:///misc/cd/

gpgcheck=1

enabled=1

gpgkey=file:///misc/cd/RPM-GPG-KEY-CentOS-7

写入/etc/yum.repos.d/CentOS-Media.repo