Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for sha256sum (centos section 1)

SHA256SUM(1)							   User Commands						      SHA256SUM(1)

sha256sum - compute and check SHA256 message digest
sha256sum [OPTION]... [FILE]...
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) Note: There is no difference between binary and text mode option on GNU system. 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-180-2. 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: <> Report sha256sum translation bugs to <http://translationpro->
Written by Ulrich Drepper, Scott Miller, and David Madore.
Copyright (C) 2013 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.
The full documentation for sha256sum is maintained as a Texinfo manual. If the info and sha256sum programs are properly installed at your site, the command info coreutils 'sha256sum invocation' should give you access to the complete manual. GNU coreutils 8.22 June 2014 SHA256SUM(1)