mkdir /mnt/cdrom

mount /dev/sr0 /mnt/cdrom

echo "[local]" >>/etc/yum.repos.d/local.repo

echo "name=local" >>/etc/yum.repos.d/local.repo

echo "baseurl=file:///mnt/cdrom" >>/etc/yum.repos.d/local.repo

echo "gpgcheck=0" >>/etc/yum.repos.d/local.repo

echo "enabled=1" >>/etc/yum.repos.d/local.repo

yum clean all&&yum makecache