1、可能原因:SELinux限制了Apache的端口設置
2、解決辦法:
//安裝semanage
yum provides /usr/sbin/semanage
yum -y install policycoreutils-python
//查看默認允許的端口
semanage port -l | grep -w http_port_t
// http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000
//使用semanage添加apache偵聽的端口
semanage port -a -t http_port_t -p tcp 8888
//啓動apache
systemctl start httpd