之前自己编译安装的apache/php/mysql——什么，连mysql也自己编译？很正常，学习嘛—— 当时是好好的，今天启动却出错了，直接运行./httpd也一样：

[feng@localhost bin]$ ./apachectl start
httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain for ServerName
(13)Permission denied: make_sock: could not bind to address [::]:80
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs

同时seLinux报警，这两行是主要的错误

(13)Permission denied: make_sock: could not bind to address [::]:80
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
毫无疑问，是权限拒绝，但之前为什么是好的呢

突然发现当前运行的账号是普通账号，而非管理员，这难怪，普通账号默认无权启动监听80端口的，su一下，输入密码，很顺利的正常启动了，当然这一行错误还是有的：

httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain for ServerName

，这无所谓，没有绑定域名，反正是本机运行的。