Man pages matching name perm in section 1:

PerM.1.en	debian 10 / perm
perm.1.en	debian 10 / perm
PerM.1.en	debian 11 / perm
perm.1.en	debian 11 / perm
PerM.1.en	debian 12 / perm
perm.1.en	debian 12 / perm