mkdir /media/rhel7-repo-iso
mount /dev/cdrom /media/rhel7-repo-iso/
vi /etc/yum.repos.d/RHEL_7_Disc.repo
cat /etc/yum.repos.d/RHEL_7_Disc.repo
[RHEL_7_Disc] name=RHEL_7_x86_64_Disc baseurl=”file:///media/rhel7-repo-iso/” gpgcheck=0