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Using grep to search for hex strings in a file

This seems to work for me: LANG=C grep –only-matching –byte-offset –binary –text –perl-regexp “<\x-hex pattern>” <file> short form: LANG=C grep -obUaP “<\x-hex pattern>” <file> Example: LANG=C grep -obUaP “\x01\x02” /bin/grep Output (cygwin binary): 153: <\x01\x02> 33210: <\x01\x02> 53453: <\x01\x02> So you can grep this again to extract offsets. But don’t forget to use binary mode … Read more

Creating a bootable ISO image with custom bootloader

It appears you found your example for creating a bootable ISO image from this StackOverflow Answer. Unfortunately you picked an accepted answer that is incorrect in many ways. Pretend you never saw that answer. On most Linux distros either a program called genisoimage or mkisofs exists. These days they are actually the same program. Whichever … Read more