centos7.4安装Nginx
1.将nginx放到yum repro库中
执行命令：sudo rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
2.使用yum安装ngnix
执行命令：sudo yum install nginx
sudo service nginx start
sudo service nginx stop
sudo service nginx restart
sudo service nginx reload #重载
关掉防火墙在浏览器就能访问nginx的页面