Man pages matching name uts_namespaces in section 7:

uts_namespaces.7.en	debian 11 / manpages
uts_namespaces.7.en	debian 12 / manpages
uts_namespaces.7.de	debian 12 / manpages-de
uts_namespaces.7.es	debian 12 / manpages-es