crc - print the checksum of the file data
crc file ...
crc *.c # Print checksums of all the C programs
The checksum of each argument is computed and printed, along
with the file length and its name, one file per line. This
program is useful for seeing if a file transmitted to
another machine has arrived correctly. It is conceptually
similar to sum, except that it uses a stronger checksum
algorithm and also prints the length.
cksum(1), sum(1).