apache常见错误总结：
1、./configure报错
Configuring Apache Portable Runtime library ...
checking for APR... configure: error: the --with-apr parameter is incorrect. It must specify an install prefix, a build directory, or an apr-config file.
解决办法:
下载安装
apr：
apr-utils：
或者yum -y install apr apr-util
checking for pcre-config... false
configure: error: pcre-config for libpcre not found. PCRE is required and available from
解决办法：
[root@ httpd-2.4.1]# yum -y install pcre-devel
2、启动报错：
[root@ bin]# service apache start
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message
httpd (pid 912) already running
其实在这里并不是报错，只是个提醒信息，解决办法比较多
（1）、在/etc/hosts写下当前ip与主机名的对应关系
（2）、在本机指能解析本机主机名的DNS
（3）、修改主配置文件，找到ServerName这一行写入本机主机名