Man pages matching name stdbuf in section 1:

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