解析centos中Apache、php、mysql 默认安装路径
apache:
如果采用RPM包安装，安装路径应在 /etc/httpd目录下
apache配置文件:/etc/httpd/conf/httpd.conf
Apache模块路径：/usr/sbin/apachectl
web目录:/var/www/html
如果采用源代码安装，一般默认安装在/usr/local/apache2目录下
php:
如果采用RPM包安装，安装路径应在 /etc/目录下
php的配置文件:/etc/php.ini
如果采用源代码安装，一般默认安装在/usr/local/lib目录下
php配置文件: /usr/local/lib/php.ini
或/usr/local/php/etc/php.ini
mysql:
如果采用RPM包安装，安装路径应在/usr/share/mysql目录下
mysqldump文件位置：/usr/bin/mysqldump
mysqli配置文件:
/etc/my.cnf或/usr/share/mysql/my.cnf
mysql数据目录在/var/lib/mysql目录下
如果采用源代码安装，一般默认安装在/usr/local/mysql目录下
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