First check what are the devices available with the command blkid
#blkid
/dev/sr0: LABEL="RHEL_5.9 x86_64" TYPE="iso9660"
from the list we can assume that there is disk labeled RHEL_5.9 x86_64 in optical drive .
Now we can mount it in /mnt/cdrom or /media/cdrom directory . If there is no directory you can create it .
# mkdir /media/cdrom
#mount -t iso9660 /dev/sr0 /media/cdrom
to unmount use umount command
#umount /media/cdrom
To eject CD or DVD in linux you can use eject comamnd
# eject
eject -t will close the tray and eject -T will close or open the tray
#blkid
/dev/sr0: LABEL="RHEL_5.9 x86_64" TYPE="iso9660"
from the list we can assume that there is disk labeled RHEL_5.9 x86_64 in optical drive .
Now we can mount it in /mnt/cdrom or /media/cdrom directory . If there is no directory you can create it .
# mkdir /media/cdrom
#mount -t iso9660 /dev/sr0 /media/cdrom
to unmount use umount command
#umount /media/cdrom
To eject CD or DVD in linux you can use eject comamnd
# eject
eject -t will close the tray and eject -T will close or open the tray