当前用户的apache已经安装为linux的服务的话，可以使用以下命令进行以上操作。
//1. 启动apache
service httpd start
//2. 停止服务apache
service httpd stop
//3. 重新启动apache
service httpd restart
下面是red hat/CentOs7关闭防火墙的命令!
//1:查看防火状态
systemctl status firewalld
service iptables status
//2:暂时关闭防火墙
systemctl stop firewalld
service iptables stop
//3:永久关闭防火墙
systemctl disable firewalld
chkconfig iptables off
//4:重启防火墙
systemctl enable firewalld
service iptables restart
apache httpd.conf默认位置
vi /etc/httpd/conf/httpd.conf
apache 错误日志默认位置
cat /var/log/httpd/error_log
