1.挂载光盘

#挂载光盘
mount /dev/cdrom /mnt/cdrom

2.修改yum.conf, 运行 vi /etc/yum.conf,文件替换成如下内容

[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=0
plugins=1
installonly_limit=3

3.进入/etc/yum.repos.d  备份rhel-source.repo

cp rhel-source.repo rhel-source.repo.bak

4.修改rhel-source.repo文件,替换成如下内容

[rhel-source]
name=Red Hat Enterprise Linux $releasever - $basearch - Source
baseurl=file:///mnt/cdrom
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[rhel-source-beta]
name=Red Hat Enterprise Linux $releasever Beta - $basearch - Source
baseurl=ftp://ftp.redhat.com/pub/redhat/linux/beta/$releasever/en/os/SRPMS/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta,file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

5.测试yum

yum list