以前遇到一个问题：
sudo /etc/init.d/apache2 start * Starting web server apache2
apache2: Could not reliably determine the server‘s fully qualified domain name, using 127.0.0.1 for ServerName (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
其实就是80端口被占用的原因，解决办法如下：
sudo fuser -k -n tcp 80 sudo /etc/init.d/apache2 start
(98)Address already in use: make_sock: could not bind to address 80 [resolved] (2012-10-11 09:04)
原文：http://www.cnblogs.com/liqiu/p/4282908.html