- Calculate the SHA256 checksum for a file:sha256sum [filename1]- Calculate SHA256 checksums for multiple files:sha256sum [filename1] [filename2]- Read a file of SHA256 sums and verify all files have matching checksums:sha256sum -c [filename.sha256]
sha256sum [,OPTION/]... [,FILE/]...
Print or check SHA256 (256-bit) checksums.
With no FILE, or when FILE is -, read standard input.
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.
Written by Ulrich Drepper, Scott Miller, and David Madore.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report sha256sum translation bugs to <http://translationproject.org/team/>
Copyright © 2016 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.
Full documentation at: <http://www.gnu.org/software/coreutils/sha256sum> or available locally via: info '(coreutils) sha2 utilities'