Man pages matching name alter_group in section 7:

alter_group.7.tr	debian 10 / manpages-tr
alter_group.7.zh_CN	debian 10 / manpages-zh
alter_group.7.zh_TW	debian 10 / manpages-zh
alter_group.7.tr	debian 11 / manpages-tr
alter_group.7.zh_CN	debian 11 / manpages-zh
alter_group.7.zh_TW	debian 11 / manpages-zh
alter_group.7.zh_CN	debian 12 / manpages-zh
alter_group.7.zh_TW	debian 12 / manpages-zh