First,insert CD/DVD in your CD/DVD ROM,then login as root.

1. Find the CD/DVD devices:
# lsblk

[root@VTEST01 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 60G 0 disk
ââsda1 8:1 0 500M 0 part /boot
ââsda2 8:2 0 39.5G 0 part
â ââVolGroup-lv_swap (dm-0) 253:0 0 4G 0 lvm [SWAP]
â ââVolGroup-lv_rootfs (dm-1) 253:1 0 16.5G 0 lvm /
â ââVolGroup-lv_var (dm-2) 253:2 0 10G 0 lvm /var
â ââVolGroup-lv_patrol (dm-3) 253:3 0 5G 0 lvm /opt/java
â ââVolGroup-lv_home (dm-4) 253:4 0 2G 0 lvm /home
â ââVolGroup-lv_opt (dm-5) 253:5 0 5G 0 lvm /opt
ââsda3 8:3 0 20G 0 part
ââVolGroup-lv_controlm (dm-6) 253:6 0 5G 0 lvm /opt/test
ââVolGroup-lv_opt (dm-5) 253:5 0 5G 0 lvm /opt
sr0 11:0 1 204M 0 rom
[root@VTEST01 ~]#

Found the CD/DVD ROM is sr0
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