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compute and check SHA224 message digest


sha224sum [OPTION]... [FILE]...

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Print or check SHA224 (224-bit) checksums. With no FILE, or when FILE is -, read standard input.
, --binary

read in binary mode

-c, --check

read SHA224 sums from the FILEs and check them


create a BSD-style checksum

-t, --text

read in text mode (default)

The following three options are useful only when verifying checksums:

don’t print OK for each successfully verified file


don’t output anything, status code shows success

-w, --warn

warn about improperly formatted checksum lines


with --check, exit non-zero for any invalid input


display this help and exit


output version information and exit

The sums are computed as described in RFC 3874. 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.


Copyright © 2012 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.

reporting bugs

Report sha224sum bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page: <>
General help using GNU software: <>
Report sha224sum translation bugs to <>

see also

The full documentation for sha224sum is maintained as a Texinfo manual. If the info and sha224sum programs are properly installed at your site, the command

info coreutils 'sha224sum invocation'

should give you access to the complete manual.


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

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