我尝试在Ubuntu 14.04 LTS上启动apache2服务。但它表明configtest失败了。我删除了它并再次安装。但它仍然无法正常工作。这是问题所在：
root@knight-HP-1000-Notebook-PC:/home/knight# service apache2 restart
* Restarting web server apache2 [fail]
* The apache2 configtest failed.
Output of config test was:
[Sat Jul 29 22:29:48.069226 2017] [so:warn] [pid 8305] AH01574: module
php5_module is already loaded, skipping
apache2: Syntax error on line 216 of /etc/apache2/apache2.conf: Could not open configuration file /etc/apache2/conf-enabled/mysite.conf: No such file or directory
Action 'configtest' failed.
The Apache error log may have more information.