1SHA256SUM(1)                     User Commands                    SHA256SUM(1)
2
3
4

NAME

6       sha256sum - compute and check SHA256 message digest
7

SYNOPSIS

9       sha256sum [OPTION]... [FILE]...
10

DESCRIPTION

12       Print  or check SHA256 (256-bit) checksums.  With no FILE, or when FILE
13       is -, read standard input.
14
15       -b, --binary
16              read in binary mode
17
18       -c, --check
19              read SHA256 sums from the FILEs and check them
20
21       -t, --text
22              read in text mode (default)
23
24              Note: There is no difference between binary and text mode option
25              on GNU system.
26
27   The following three options are useful only when verifying checksums:
28       --quiet
29              don't print OK for each successfully verified file
30
31       --status
32              don't output anything, status code shows success
33
34       -w, --warn
35              warn about improperly formatted checksum lines
36
37       --help display this help and exit
38
39       --version
40              output version information and exit
41
42       The  sums  are computed as described in FIPS-180-2.  When checking, the
43       input should be a former output of this program.  The default  mode  is
44       to  print  a  line  with checksum, a character indicating type (`*' for
45       binary, ` ' for text), and name for each FILE.
46

AUTHOR

48       Written by Ulrich Drepper, Scott Miller, and David Madore.
49

REPORTING BUGS

51       Report sha256sum bugs to bug-coreutils@gnu.org
52       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
53       General help using GNU software: <http://www.gnu.org/gethelp/>
54       Report   sha256sum   translation   bugs   to    <http://translationpro‐
55       ject.org/team/>
56

58       Copyright  ©  2010  Free Software Foundation, Inc.  License GPLv3+: GNU
59       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
60       This is free software: you are free  to  change  and  redistribute  it.
61       There is NO WARRANTY, to the extent permitted by law.
62

SEE ALSO

64       The full documentation for sha256sum is maintained as a Texinfo manual.
65       If the info and sha256sum programs are properly installed at your site,
66       the command
67
68              info coreutils 'sha256sum invocation'
69
70       should give you access to the complete manual.
71
72
73
74GNU coreutils 8.5                November 2010                    SHA256SUM(1)
Impressum