Man pages matching name ypserv in section 8:

ypserv.8.ja	debian 10 / manpages-ja
ypserv.8.en	debian 10 / nis
ypserv.8.ja	debian 11 / manpages-ja
ypserv.8.en	debian 11 / ypserv
ypserv.8.ja	debian 12 / manpages-ja
ypserv.8.en	debian 12 / ypserv