Sponsor:

Your company here — click to reach over 10,000 unique daily visitors

b2sum - Man Page

compute and check BLAKE2 message digest

Examples (TL;DR)

Synopsis

b2sum [OPTION]... [FILE]...

Description

Print or check BLAKE2b (512-bit) checksums.

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

Mandatory arguments to long options are mandatory for short options too.

-b,  --binary

read in binary mode

-c,  --check

read checksums from the FILEs and check them

-l,  --length=BITS

digest length in bits; must not exceed the max for the blake2 algorithm and must be a multiple of 8

--tag

create a BSD-style checksum

-t,  --text

read in text mode (default)

-z,  --zero

end each output line with NUL, not newline, and disable file name escaping

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 RFC 7693. 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.

There is no difference between binary mode and text mode on GNU systems.

Author

Written by Padraig Brady and Samuel Neves.

Reporting Bugs

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

See Also

cksum(1)

Full documentation <https://www.gnu.org/software/coreutils/b2sum>
or available locally via: info '(coreutils) b2sum invocation'

Referenced By

md5sum(1), sha1sum(1).

July 2024 GNU coreutils 9.5