sha256sum Man page

SHA256SUM(1) User Commands SHA256SUM(1)

NAME

sha256sum – compute and check SHA256 message digest

SYNOPSIS

sha256sum [OPTION]… [FILE]…

DESCRIPTION

Print or check SHA256 (256-bit) checksums.

With no FILE, or when FILE is -, read standard input.

-b, –binary
read in binary mode

-c, –check
read SHA256 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:
–ignore-missing
don’t fail or report status for missing files

–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-180-2. 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.

AUTHOR

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

REPORTING BUGS

GNU coreutils online help:
Report sha256sum translation bugs to

COPRYRIGHT

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.

SEE ALSO

Full documentation at:
or available locally via: info ‘(coreutils) sha2 utilities’

GNU coreutils 8.25 February 2016 SHA256SUM(1)

Ils en parlent aussi

Crypto-monnaies : le bitcoin | Le blog de Carl Chenet