sum - compute the checksum and block count of a file
sum file
(none)
sum /user/ast/xyz # Checksum /user/ast/xyz
Sum computes the checksum of one or more files. It is most often used to
see if a file copied from another machine has been correctly received.
This program works best when both machines use the same checksum
algorithm. See also crc.
cksum(1), crc(1).