Find the byte sum of a file to verify its integrity in DOS.

filebytesum is a dos app to find the byte sum of a file to verify its integrity.
Such a requirement in case of communication as well as storage (storage can be considered
as communication where source is current you and destination is a later you). Communication
is almost always lossy, and can introduce errors into data. A measure like this helps to
verify the correctness of data (but cannot guarentee that it is correct). More details
here.

Enter Filename whose byte sum is required.

Checksum is the sum of bytes in the file.