我刚刚重新安装了Apache，现在它无法启动。
这是我得到的错误：
Failed to start Apache :
* Starting web server apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
[Sat May 17 01:48:30 2014] [warn] NameVirtualHost *:443 has no VirtualHosts
[Sat May 17 01:48:30 2014] [warn] NameVirtualHost *:80 has no VirtualHosts
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.
...fail!
我需要知道为什么它不会启动。如果还需要其他任何东西，请问。