1SHA1SUM(1)                       User Commands                      SHA1SUM(1)
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NAME

6       sha1sum - compute and check SHA1 message digest
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SYNOPSIS

9       sha1sum [OPTION]... [FILE]...
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DESCRIPTION

12       Print or check SHA1 (160-bit) checksums.  With no FILE, or when FILE is
13       -, read standard input.
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15       -b, --binary
16              read in binary mode
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18       -c, --check
19              read SHA1 sums from the FILEs and check them
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21       -t, --text
22              read in text mode (default)
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24              Note: There is no difference between binary and text mode option
25              on GNU system.
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27   The following three options are useful only when verifying checksums:
28       --quiet
29              don't print OK for each successfully verified file
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31       --status
32              don't output anything, status code shows success
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34       -w, --warn
35              warn about improperly formatted checksum lines
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37       --help display this help and exit
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39       --version
40              output version information and exit
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42       The  sums  are computed as described in FIPS-180-1.  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.
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AUTHOR

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

51       Report sha1sum 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   sha1sum   translation    bugs    to    <http://translationpro‐
55       ject.org/team/>
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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.
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SEE ALSO

64       The  full  documentation for sha1sum is maintained as a Texinfo manual.
65       If the info and sha1sum programs are properly installed at  your  site,
66       the command
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68              info coreutils 'sha1sum invocation'
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70       should give you access to the complete manual.
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74GNU coreutils 8.5                November 2010                      SHA1SUM(1)
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