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SHA1SUM

Section: User Commands (1)
Updated: July 2014
Index Return to Main Contents
 

NAME

sha1sum - compute and check SHA1 message digest  

SYNOPSIS

sha1sum [OPTION]... [FILE]...  

DESCRIPTION

Print or check SHA1 (160-bit) checksums. With no FILE, or when FILE is -, read standard input.

-b, --binary
read in binary mode
-c, --check
read SHA1 sums from the FILEs and check them
--tag
create a BSD-style checksum
-t, --text
read in text mode (default)
 

The following four options are useful only when verifying checksums:

--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
--help
display this help and exit
--version
output version information and exit

The sums are computed as described in FIPS-180-1. When checking, the input should be a former output of this program. The default mode is to print a line with checksum, a character indicating input mode ('*' for binary, space for text), and name for each FILE.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report sha1sum translation bugs to <http://translationproject.org/team/>  

AUTHOR

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

COPYRIGHT

Copyright © 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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 ALSO

The full documentation for sha1sum is maintained as a Texinfo manual. If the info and sha1sum programs are properly installed at your site, the command
info coreutils aqsha1sum invocationaq

should give you access to the complete manual.


 

Index

NAME
SYNOPSIS
DESCRIPTION
The following four options are useful only when verifying checksums:
AUTHOR
COPYRIGHT
SEE ALSO


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