当启动Apache时：

service httpd start

报错：

(98)Address already in use: AH00072: make_sock: could not bind to address [::]:443

可能是443端口被占用，查看进程：

netstat -lnp|grep 443

返回为空。

搜索下解决方案。

参考：http://www.linuxquestions.org/questions/linux-software-2/98-address-already-in-use-make_sock-could-not-bind-to-address-0-0-0-0-443-a-110753/

In my case the problem went away when I commented out

Listen :443

in httpd.conf

My GUESS is Apache was already grabbing this port via a virtual host in another config file, and a second attempt to hold onto it confues good old Apache to such an extent that it would just totally give up.

的确因为我在 httpd.conf 存在 Listen :443 这一行，于是注释掉。再启动就正常了。