sha1sum Man page

Resume Wikipedia de GNU Core Utilities

Coreutils (ou GNU Core Utilities) est un paquetage du projet GNU contenant de nombreux outils de base nécessaires pour les systèmes d’exploitation de type Unix (dont notamment GNU/Linux), tels que cat, ls, et rm. C’est une combinaison de paquetages plus anciens, incluant notamment textutils (pour le texte), shellutils (pour les scripts), et fileutils (pour les fichiers).

SHA1SUM(1) User Commands SHA1SUM(1)


sha1sum – compute and check SHA1 message digest


sha1sum [OPTION]… [FILE]…


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 five options are useful only when verifying checksums:
don’t fail or report status for missing files

don’t print OK for each successfully verified file

don’t output anything, status code shows success

exit non-zero for improperly formatted checksum lines

-w, –warn
warn about improperly formatted checksum lines

–help display this help and exit

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 space, a character indicating input
mode (‘*’ for binary, ‘ ‘ for text or where binary is insignificant),
and name for each FILE.


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


GNU coreutils online help:
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Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.


Full documentation at:
or available locally via: info ‘(coreutils) sha1sum invocation’

GNU coreutils 8.25 February 2016 SHA1SUM(1)