我已经在我的基于 Debian 的发行版（内核 3.2.0-27）和 apache2.2-common 包上安装了 Apache 2.2，并具有默认配置。
尝试运行简单的脚本 info.php 我在 /var/log/apache2/error.log 中发现了错误：
[Wed Jul 16 09:17:08 2014] [crit] [client 127.0.0.1] configuration error: couldn't perform authentication. AuthType not set!: /info.php
我在互联网上搜索了几个小时，但没有找到解决方案。
脚本信息.php：
<?php
phpinfo();
?>
配置文件：
/etc/apache2/apache2.conf：
...
Include httpd.conf
Include ports.conf
Include conf.d/
Include sites-enabled/
...
/etc/apache2/httpd.conf 很清楚。
/etc/apache2/ports.conf：
...
NameVirtualHost *:80
Listen 80
...
/etc/apache2/conf.d/security：
...
ServerSignature On
TraceEnable Off
...
/etc/apache2/sites-enabled/@000-default（链接到 /etc/apache2/sites-available/default）：
<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
</Directory>
ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
<Directory "/usr/lib/cgi-bin">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
已加载模块列表（由 获取apache2ctl -M）：
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
Loaded Modules:
core_module (static)
authn_file_module (static)
authn_default_module (static)
authz_default_module (static)
log_config_module (static)
logio_module (static)
mpm_prefork_module (static)
http_module (static)
so_module (static)
alias_module (shared)
authz_groupfile_module (shared)
authz_host_module (shared)
authz_user_module (shared)
autoindex_module (shared)
cgi_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
mime_module (shared)
negotiation_module (shared)
reqtimeout_module (shared)
setenvif_module (shared)
status_module (shared)
Syntax OK
我应该进行哪些更改才能使服务器正常工作？