1CKSUM(1)                         User Commands                        CKSUM(1)
2
3
4

NAME

6       cksum - compute and verify file checksums
7

SYNOPSIS

9       cksum [OPTION]... [FILE]...
10

DESCRIPTION

12       Print or verify checksums.  By default use the 32 bit CRC algorithm.
13
14       With no FILE, or when FILE is -, read standard input.
15
16       Mandatory  arguments  to  long  options are mandatory for short options
17       too.
18
19       -a, --algorithm=TYPE
20              select the digest type to use.  See DIGEST below.
21
22       -c, --check
23              read checksums from the FILEs and check them
24
25       -l, --length=BITS
26              digest length in bits; must not exceed the max  for  the  blake2
27              algorithm and must be a multiple of 8
28
29       --tag  create a BSD-style checksum (the default)
30
31       --untagged
32              create a reversed style checksum, without digest type
33
34       -z, --zero
35              end  each  output  line  with NUL, not newline, and disable file
36              name escaping
37
38   The following five options are useful only when verifying checksums:
39       --ignore-missing
40              don't fail or report status for missing files
41
42       --quiet
43              don't print OK for each successfully verified file
44
45       --status
46              don't output anything, status code shows success
47
48       --strict
49              exit non-zero for improperly formatted checksum lines
50
51       -w, --warn
52              warn about improperly formatted checksum lines
53
54       --debug
55              indicate which implementation used
56
57       --help display this help and exit
58
59       --version
60              output version information and exit
61
62   DIGEST determines the digest algorithm and default output format:
63       sysv   (equivalent to sum -s)
64
65       bsd    (equivalent to sum -r)
66
67       crc    (equivalent to cksum)
68
69       md5    (equivalent to md5sum)
70
71       sha1   (equivalent to sha1sum)
72
73       sha224 (equivalent to sha224sum)
74
75       sha256 (equivalent to sha256sum)
76
77       sha384 (equivalent to sha384sum)
78
79       sha512 (equivalent to sha512sum)
80
81       blake2b
82              (equivalent to b2sum)
83
84       sm3    (only available through cksum)
85
86       When checking, the input should be a former output of this program,  or
87       equivalent standalone program.
88

AUTHOR

90       Written by Padraig Brady and Q. Frank Xia.
91

REPORTING BUGS

93       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
94       Report any translation bugs to <https://translationproject.org/team/>
95

97       Copyright  ©  2022  Free Software Foundation, Inc.  License GPLv3+: GNU
98       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
99       This is free software: you are free  to  change  and  redistribute  it.
100       There is NO WARRANTY, to the extent permitted by law.
101

SEE ALSO

103       Full documentation <https://www.gnu.org/software/coreutils/cksum>
104       or available locally via: info '(coreutils) cksum invocation'
105
106
107
108GNU coreutils 9.1                January 2023                         CKSUM(1)
Impressum