Man pages matching name open in section 2:

open.2.de	debian 10 / manpages-de-dev
open.2.en	debian 10 / manpages-dev
open.2.es	debian 10 / manpages-es
open.2.ja	debian 10 / manpages-ja-dev
open.2.pl	debian 10 / manpages-pl-dev
open.2.zh_CN	debian 10 / manpages-zh
open.2.zh_TW	debian 10 / manpages-zh
open.2.de	debian 11 / manpages-de-dev
open.2.en	debian 11 / manpages-dev
open.2.fr	debian 11 / manpages-fr-dev
open.2.ja	debian 11 / manpages-ja-dev
open.2.zh_CN	debian 11 / manpages-zh
open.2.zh_TW	debian 11 / manpages-zh
open.2.de	debian 12 / manpages-de-dev
open.2.en	debian 12 / manpages-dev
open.2.fr	debian 12 / manpages-fr-dev
open.2.ja	debian 12 / manpages-ja-dev
open.2.ru	debian 12 / manpages-ru-dev
open.2.zh_CN	debian 12 / manpages-zh
open.2.zh_TW	debian 12 / manpages-zh