kdc.conf(5) on Linux
The text ea02de615d7c, as Debian 11 (Bullseye) shipped it.
Kerberos V5 KDC configuration file The kdc.conf file supplements krb5.conf(5) for programs which are typically only used on a KDC, such as the krb5kdc(8) and kadmind(8) daemons and the kdb5_util(8) program. Relations documented here may also be specified in krb5.conf; for the KDC programs mentioned, krb5.conf and kdc.conf will be merged into a single configuration profile. Normally, the kdc.conf file is found in the KDC state directory, /etc/krb5kdc. You can override the default location by setting the environment variable KRB5_KDC_PROFILE. Please note that you need to restart the KDC daemon for any configuration changes to take effect.