cksum - compute and verify file checksums
cksum [OPTION]... [FILE]...
Print or verify checksums. By default use the 32 bit CRC algorithm.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
- -a, --algorithm=TYPE
- select the digest type to use. See DIGEST below.
- -c, --check
- read checksums from the FILEs and check them
- -l, --length=BITS
- digest length in bits; must not exceed the max for the blake2 algorithm and must be a multiple of 8
- create a BSD-style checksum (the default)
- create a reversed style checksum, without digest type
- -z, --zero
- end each output line with NUL, not newline, and disable file name escaping
- don't fail or report status for missing files
- don't print OK for each successfully verified file
- don't output anything, status code shows success
- exit non-zero for improperly formatted checksum lines
- -w, --warn
- warn about improperly formatted checksum lines
- indicate which implementation used
- display this help and exit
- output version information and exit
- (equivalent to sum -s)
- (equivalent to sum -r)
- (equivalent to cksum)
- (equivalent to md5sum)
- (equivalent to sha1sum)
- (equivalent to sha224sum)
- (equivalent to sha256sum)
- (equivalent to sha384sum)
- (equivalent to sha512sum)
- (equivalent to b2sum)
- (only available through cksum)
When checking, the input should be a former output of this program, or equivalent standalone program.
Written by Padraig Brady and Q. Frank Xia.
Copyright © 2021 Free Software Foundation, Inc. License
GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
or available locally via: info '(coreutils) cksum invocation'
|September 2021||GNU coreutils 9.0|