livecd-iso-to-disk.sh is a Bash shell script from livecd-tools, http://git.fedorahosted.org/git/?p=hosted/livecd;a=blob;f=tools/livecd-iso-to-disk.sh;hb=HEAD
In a LiveCD distribution, the script is usually available in the installation disc's filesystem at(alongside squashfs.img and osmin.img). From a booted LiveOS filesystem, the outer USB/SD/CD/DVD device filesystem is mounted on the mount point (or at on Fedora 16 and earlier).
Usage is documented in the first 270 or so lines of the the script, and accessible with the http://git.fedorahosted.org/git?p=hosted/livecd;a=blob;f=docs/livecd-iso-to-disk.pod;hb=HEAD , but the formating makes it difficult to read from a web browser.command. Documentation is also in livecd-iso-to-disk.pod,