Man pages matching name sha1sum in section 1:

sha1sum.1.en	debian 10 / coreutils
sha1sum.1.de	debian 10 / manpages-de
sha1sum.1.ja	debian 10 / manpages-ja
sha1sum.1.pl	debian 10 / manpages-pl
sha1sum.1.tr	debian 10 / manpages-tr
sha1sum.1.zh_CN	debian 10 / manpages-zh
sha1sum.1.zh_TW	debian 10 / manpages-zh
sha1sum.1.en	debian 11 / coreutils
sha1sum.1.de	debian 11 / manpages-de
sha1sum.1.fr	debian 11 / manpages-fr
sha1sum.1.ja	debian 11 / manpages-ja
sha1sum.1.nl	debian 11 / manpages-nl
sha1sum.1.pl	debian 11 / manpages-pl
sha1sum.1.tr	debian 11 / manpages-tr
sha1sum.1.zh_CN	debian 11 / manpages-zh
sha1sum.1.zh_TW	debian 11 / manpages-zh
sha1sum.1.en	debian 12 / coreutils
sha1sum.1.da	debian 12 / manpages-da
sha1sum.1.de	debian 12 / manpages-de
sha1sum.1.es	debian 12 / manpages-es
sha1sum.1.fr	debian 12 / manpages-fr
sha1sum.1.hu	debian 12 / manpages-hu
sha1sum.1.ja	debian 12 / manpages-ja
sha1sum.1.nb	debian 12 / manpages-nb
sha1sum.1.nl	debian 12 / manpages-nl
sha1sum.1.pl	debian 12 / manpages-pl
sha1sum.1.sr	debian 12 / manpages-sr
sha1sum.1.sv	debian 12 / manpages-sv
sha1sum.1.tr	debian 12 / manpages-tr
sha1sum.1.vi	debian 12 / manpages-vi
sha1sum.1.zh_CN	debian 12 / manpages-zh
sha1sum.1.zh_TW	debian 12 / manpages-zh