iso9660shorten <path/name> Renames the name
file to a filename short enough to fit the ISO9660 spec, while keeps the
extension intact. In the case of filename collision, renames the files to
filename1.ext, filename2.ext, etc. by appending digit 1-9 to the filename in front
of the extension. Renamed file list is appended to file renamed.txt in the current
directory, to allow eventual easy restoration of the original names.
Useful to call from a for..in..do..done loop or by find/xargs.