Man pages matching name b2sum in section 1:

b2sum.1.en	debian 10 / coreutils
b2sum.1.zh_CN	debian 10 / manpages-zh
b2sum.1.zh_TW	debian 10 / manpages-zh
b2sum.1.en	debian 11 / coreutils
b2sum.1.de	debian 11 / manpages-de
b2sum.1.fr	debian 11 / manpages-fr
b2sum.1.nl	debian 11 / manpages-nl
b2sum.1.zh_CN	debian 11 / manpages-zh
b2sum.1.zh_TW	debian 11 / manpages-zh
b2sum.1.en	debian 12 / coreutils
b2sum.1.da	debian 12 / manpages-da
b2sum.1.de	debian 12 / manpages-de
b2sum.1.es	debian 12 / manpages-es
b2sum.1.fr	debian 12 / manpages-fr
b2sum.1.hu	debian 12 / manpages-hu
b2sum.1.ja	debian 12 / manpages-ja
b2sum.1.mk	debian 12 / manpages-mk
b2sum.1.nb	debian 12 / manpages-nb
b2sum.1.nl	debian 12 / manpages-nl
b2sum.1.sr	debian 12 / manpages-sr
b2sum.1.sv	debian 12 / manpages-sv
b2sum.1.tr	debian 12 / manpages-tr
b2sum.1.vi	debian 12 / manpages-vi
b2sum.1.zh_CN	debian 12 / manpages-zh
b2sum.1.zh_TW	debian 12 / manpages-zh