I have seen and used the GUI hex-editor
bless, to modify bitmaps to match a separate file type (form bmp to srf). My question is how to modify file headers programmatically with the command line. What programs would allow me to make changes to file headers from shell script?
I have looked in synaptic package manager, but I'm new to modifying files in hex. Do bitmaps count as binary files? Where this is a software recommendation request, an acceptable answer would allow me to write, overwrite, or change specific values to specific locations (such as the first 16 bytes of a file), in the command line.