sum
sum
sum [options] files
Calculate and print a checksum and the number of (1 KB) blocks for file. If no files are specified, or file is -, read from standard input. Useful for verifying data transmission.
Options
The default setting. Use the BSD checksum algorithm.
Use alternate checksum algorithm as used on System V. The block size is 512 bytes.
Print a help message and then exit.
Print the version number and then exit.