Man pages matching name pam_krb5 in section 5:

pam_krb5.5.en	debian 10 / libpam-heimdal
pam_krb5.5.en	debian 10 / libpam-krb5
pam_krb5.5.en	debian 11 / libpam-heimdal
pam_krb5.5.en	debian 11 / libpam-krb5
pam_krb5.5.en	debian 12 / libpam-heimdal
pam_krb5.5.en	debian 12 / libpam-krb5