image source

1.
mkdir /mnt/iso
mkdir /mnt/cdrom

2.

mount -o loop /mnt/iso/CentOS-6.5-x86_64-bin-DVD1.iso /mnt/cdrom

df -h

3.

vi CentOS-Media.repo

[c5-media]

name=CentOS-$releasever - Media

baseurl=file:///media/CentOS/

        file:///mnt/cdrom/

        file:///media/cdrecorder/

gpgcheck=0

enabled=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

4.

yum clean

yum list