1.       配置yum客户端使用本地源

#mkdir     /mnt/cdrom
#mount     /dev/cdrom    /mnt/cdrom
#vim     /etc/yum.repos.d/rhel-debuginfo.repo



写入下面内容：
[rhel-debuginfo]
name=Red Hat Enterprise Linux $releasever - $basearch - Debug
baseurl=file:///mnt/cdrom/Server
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release