Postprocess ISO images for hybrid mode (Perl)



Starting in version 3.72, ISOLINUX supports a "hybrid mode" which can be booted from either CD-ROM or from a device which BIOS considers a hard disk or ZIP disk, e.g. a USB key or similar.

To enable this mode, the .iso image needs to be postprecessed with this utility.

Note: is a Perl script, a C implementation of the same utility is available as isohybrid(1).


Number of default geometry heads.
Number of default geometry sectors.
Specify partition entry number (1-4).
Specify partition offset (default 0).
Specify partition type (default 0x17).
Specify MBR ID (default random).
Always assume we are loaded as disk ID 0.
Assume disk ID 0 if the Ctrl key is pressed.
Allow booting from within a partition.


More information about the Syslinux project can be found on the homepage at <>.

AUTHOR was written by H. Peter Anvin <[email protected]>.

This manual page was written by Daniel Baumann <[email protected]>.