cksum
write file checksums and sizes
TLDR
Display a 32-bit checksum, size in bytes and filename
SYNOPSIS
cksum [OPTION]... [FILE]...
DESCRIPTION
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
- --tag
-
create a BSD-style checksum (the default)
- --untagged
-
create a reversed style checksum, without digest type
- -z, --zero
-
end each output line with NUL, not newline, and disable file name escaping
The following five options are useful only when verifying checksums:
- --ignore-missing
-
don't fail or report status for missing files
- --quiet
-
don't print OK for each successfully verified file
- --status
-
don't output anything, status code shows success
- --strict
-
exit non-zero for improperly formatted checksum lines
- -w, --warn
-
warn about improperly formatted checksum lines
- --debug
-
indicate which implementation used
- --help
-
display this help and exit
- --version
-
output version information and exit
DIGEST determines the digest algorithm and default output format:
- sysv
-
(equivalent to sum -s)
- bsd
-
(equivalent to sum -r)
- crc
-
(equivalent to cksum)
- md5
-
(equivalent to md5sum)
- sha1
-
(equivalent to sha1sum)
- sha224
-
(equivalent to sha224sum)
- sha256
-
(equivalent to sha256sum)
- sha384
-
(equivalent to sha384sum)
- sha512
-
(equivalent to sha512sum)
- blake2b
-
(equivalent to b2sum)
- sm3
-
(only available through cksum)
When checking, the input should be a former output of this program, or equivalent standalone program.
REPORTING BUGS
GNU coreutils online help:
<https://www.gnu.org/software/coreutils/>
Report any translation bugs to
<https://translationproject.org/team/>
COPYRIGHT
Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There
is NO WARRANTY, to the extent permitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/cksum> or available locally via: info '(coreutils) cksum invocation'
AUTHOR
Written by Padraig Brady and Q. Frank Xia.
