1MD5SUM(1)                        User Commands                       MD5SUM(1)
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NAME

6       md5sum - compute and check MD5 message digest
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SYNOPSIS

9       md5sum [OPTION]... [FILE]...
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DESCRIPTION

12       Print or check MD5 (128-bit) checksums.
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14       With no FILE, or when FILE is -, read standard input.
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16       -b, --binary
17              read in binary mode
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19       -c, --check
20              read MD5 sums from the FILEs and check them
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22       --tag  create a BSD-style checksum
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24       -t, --text
25              read in text mode (default)
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27              Note: There is no difference between binary and text mode option
28              on GNU system.  -z, --zero           end each output  line  with
29              NUL, not newline,
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31              and disable file name escaping
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33   The following five options are useful only when verifying checksums:
34       --ignore-missing
35              don't fail or report status for missing files
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37       --quiet
38              don't print OK for each successfully verified file
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40       --status
41              don't output anything, status code shows success
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43       --strict
44              exit non-zero for improperly formatted checksum lines
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46       -w, --warn
47              warn about improperly formatted checksum lines
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49       --help display this help and exit
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51       --version
52              output version information and exit
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54       The  sums  are  computed  as described in RFC 1321.  When checking, the
55       input should be a former output of this program.  The default  mode  is
56       to  print  a  line with checksum, a space, a character indicating input
57       mode ('*' for binary, ' ' for text or where binary  is  insignificant),
58       and name for each FILE.
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BUGS

61       Do  not  use the MD5 algorithm for security related purposes.  Instead,
62       use an SHA-2  algorithm,  implemented  in  the  programs  sha224sum(1),
63       sha256sum(1),  sha384sum(1),  sha512sum(1),  or  the  BLAKE2 algorithm,
64       implemented in b2sum(1)
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AUTHOR

67       Written by Ulrich Drepper, Scott Miller, and David Madore.
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REPORTING BUGS

70       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
71       Report   md5sum   translation    bugs    to    <https://translationpro‐
72       ject.org/team/>
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75       Copyright  ©  2018  Free Software Foundation, Inc.  License GPLv3+: GNU
76       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
77       This is free software: you are free  to  change  and  redistribute  it.
78       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

81       Full documentation at: <https://www.gnu.org/software/coreutils/md5sum>
82       or available locally via: info '(coreutils) md5sum invocation'
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86GNU coreutils 8.30                 July 2018                         MD5SUM(1)
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