站点添加及linux防火墙和selinux启动和停止
apache站点添加
linux系统防火墙和selinux起停
1、防火墙firewall操作
查看防火墙的状态，如下（默认开启）：
systemctl status firewalld
关闭服务
systemctl stop firewalld
关闭开机自动开启FireWall服务
systemctl disable firewalld
2、selinux操作
查看SELinux的状态，如下（默认开启）：
getenforce 开启状态为Enforcing
单次修改，重启失效：
setenforce 0
永久修改：
vi /etc/selinux/config
This file controls the state of SELinux on the system.
SELINUX= can take one of these three values:
enforcing - SELinux security policy is enforced.
permissive - SELinux prints warnings instead of enforcing.
disabled - No SELinux policy is loaded.
SELINUX=enforcing
SELINUXTYPE= can take one of three two values:
targeted - Targeted processes are protected,
minimum - Modification of targeted policy. Only selected processes are protected.
mls - Multi Level Security protection.
SELINUXTYPE=targeted
将enforcing改为disabled，保存退出
