Get information about ISO 9660 formats.
genisoimage package on Ubuntu 14.04.
One important type of ISO file are distribution media, e.g. http://releases.ubuntu.com/14.04/ubuntu-14.04.2-desktop-amd64.iso
List files:
isoimage -i file.iso -l
See also: http://superuser.com/questions/180744/how-do-i-extract-an-iso-on-linux-without-root-access