centos7配置yum源

首先，将镜像连接上

然后桌面会出现图标

然后开始进行挂载

mount /dev/sr0 /mnt/cdrom

cd /etc/yum.repos.d

ls

mv /etc/yum.repos.d/Centos-Base.repo /etc/yum.repos.d/Centos-Base.repo.bak

vim Centos-Media.repo

[c5-media]

name=Centos-$releasever-media

baseurl=file:///mnt/cdrom

gpgcheck=0

enabled=1

gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-beta

之后再yum repolist就可以了