CKSUM - Online Linux Manual PageSection : 1
Updated : January 2023
Source : GNU coreutils 9.1
Note : User Commands
NAMEcksum − compute and verify file checksums
SYNOPSIScksum [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.
AUTHORWritten by Padraig Brady and Q. Frank Xia.
REPORTING BUGSGNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHTCopyright © 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 ALSOFull documentation <https://www.gnu.org/software/coreutils/cksum>
or available locally via: info '(coreutils) cksum invocation' 0
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