cksum

(1)

compute and verify file checksums

User commands 16 optionscoreutils 9.7-3

cksum [OPTION]... [FILE]...

Options

-a--algorithmTYPE

select the digest type to use. See DIGEST below

--base64

emit base64-encoded digests, not hexadecimal

-c--check

read checksums from the FILEs and check them

-l--lengthBITS

digest length in bits; must not exceed the max for the blake2 algorithm and must be a multiple of 8

--raw

emit a raw binary digest, not hexadecimal

--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

--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

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
--base64: emit base64-encoded digests, not hexadecimal
-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
--raw: emit a raw binary digest, not hexadecimal
--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)
crc32b: (only available through 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.

AUTHOR

Written by Padraig Brady and Q. Frank Xia.

REPORTING BUGS

GNU coreutils online help: https://www.gnu.org/software/coreutils/
Report any translation bugs to https://translationproject.org/team/