Cmp compares two files and prints a message if their contents differ.
cmp [–lLs] FILE1 FILE2 [OFFSET1 [OFFSET2]]
If offsets are given, comparison starts at the designated byte position of the corresponding file. Offsets that begin with 0x are hexadecimal; with 0, octal; with anything else, decimal.
–l: Print the byte number (decimal) and the differing bytes (octal) for each difference. –L: Print the line number of the first differing byte. –s: Print nothing for differing files, but set the exit status.