Objdump

To analyze object and and executable files, there is objdump
to disassemble: objdump -dr <file>
to see ELF headers: objdump -h <file>
to see an ELF section: objdump --full-contents
to see source and assembly: objdump -S


Objdump allows looking in binary files too
objdump -b binary -m arm -D <file>
objdump -b binary -m i386 --adjust-vma=<addr> -D <file>
We can thus look at boot loader code
We can look at a peripheral's firmware image