Basic Auth .htaccess 101

All these are working on Ubuntu 13.04

1. Check if apache modules are loaded:

on ubuntu this one works find:
apache2ctl -M

 auth_basic_module (shared)
 authn_file_module (shared)
 authz_default_module (shared)
 authz_groupfile_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
not all required, but my config is loading these now. auth_... and authn_... are realy required for my example, but i don't know which of those authz are required..