# mcookie > Generates random 128-bit hexadecimal numbers. > More information: . - Generate a random number: `mcookie` - Generate a random number, using the contents of a file as a seed for the randomness: `mcookie --file {{path/to/file}}` - Generate a random number, using a specific number of bytes from a file as a seed for the randomness: `mcookie --file {{path/to/file}} --max-size {{number_of_bytes}}` - Print the details of the randomness used, such as the origin and seed for each source: `mcookie --verbose`