Man Pages in krb5-doc

Section 5: File formats and conventions

k5identity.5

Kerberos v5 client principal selection rules

k5login.5

Kerberos v5 acl file for host access

krb5.conf.5

Kerberos configuration file the krb5.conf file contains kerberos configuration information, including the locations of kdcs and admin servers for the kerberos realms of interest, defaults for the current realm and for kerberos applications, and mappings of hostnames onto kerberos realms. normally, you should install your krb5.conf file in the directory /etc. you can override the default location by setting the environment variable krb5_config.