$ blkid /dev/sr0
/dev/sr0: UUID="2016-05-24-20-55-44-00" LABEL="config-2" TYPE="iso9660"
$ mount /dev/sr0 /mnt
mount: only root can do that
$ sudo mount /dev/sr0 /mnt
mount: /dev/sr0 is write-protected, mounting read-only
$ sudo find /mnt/ -type f
/mnt/ec2/2009-04-04/meta-data.json
/mnt/ec2/2009-04-04/user-data
/mnt/ec2/latest/meta-data.json
/mnt/ec2/latest/user-data
/mnt/openstack/2012-08-10/meta_data.json
/mnt/openstack/2012-08-10/user_data
/mnt/openstack/2013-04-04/meta_data.json
/mnt/openstack/2013-04-04/user_data
/mnt/openstack/2013-10-17/meta_data.json
/mnt/openstack/2013-10-17/user_data
/mnt/openstack/2013-10-17/vendor_data.json
/mnt/openstack/2015-10-15/meta_data.json
/mnt/openstack/2015-10-15/user_data
/mnt/openstack/2015-10-15/vendor_data.json
/mnt/openstack/latest/meta_data.json
/mnt/openstack/latest/user_data
/mnt/openstack/latest/vendor_data.json