1、先挂载镜像：
mkdir /mnt/rheldvd
mount /dev/cdrom /mnt/rheldvd
2、修改配置：vim /etc/yum.repos.d/rhel-local.repo
[rhel-local]
name=Red Hat Enterprise Linux 6.4
baseurl=file:///mnt/rheldvd
enabled=1
gpgcheck=0
gpgkey=file:///mnt/rheldvd/RPM-GPG-KEY-redhat-release
