Linux man pages

Section (1) b2sum

Linux manual pages	Section 1

Name

b2sum — compute and check BLAKE2 message digest

Synopsis

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

DESCRIPTION

Print or check BLAKE2 (512−bit) checksums.

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

−b, −−binary: read in binary mode
−c, −−check: read BLAKE2 sums from the FILEs and check them
−l, −−length: digest length in bits; must not exceed the maximum 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_zsingle_quotesz_t fail or report status for missing files
−−quiet: don_zsingle_quotesz_t print OK for each successfully verified file
−−status: don_zsingle_quotesz_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 (_zsingle_quotesz_*_zsingle_quotesz_ for binary, _zsingle_quotesz_ _zsingle_quotesz_ for text or where binary is insignificant), and name for each FILE.

AUTHOR

Written by Padraig Brady and Samuel Neves.

REPORTING BUGS

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>

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