CKSUM(1)CKSUM(1)NAMEcksum - checksum and count the bytes in a file
SYNOPSIScksum [--help] [--version] [file...]
This documentation is no longer being maintained and may be inaccurate
or incomplete. The Texinfo documentation is now the authoritative
This manual page documents the GNU version of cksum. cksum computes a
cyclic redundancy check (CRC) for each named file, or the standard
input if none are given or when a file named `-' is given. It prints
the CRC for each file along with the number of bytes in the file, and
the file name unless no arguments were given.
cksum is typically used to make sure that files have been transferred
by unreliable means (such as netnews) have not been corrupted, by com‐
paring the cksum output for the received files with the cksum output
for the original files. The CRC algorithm is specified by the POSIX.2
standard. It is not compatible with the BSD or System V sum programs;
it is more robust.
--help Print a usage message and exit with a status code indicating
Print version information on standard output then exit.
FSF GNU Text Utilities CKSUM(1)