0.yum info nginx
1. yum -y install nginx
2. service nginx start
访问 80后端口看到以下页面：
This is the default index.html page that is distributed with nginx on Red Hat Enterprise Linux. It is located in /usr/share/nginx/html.
You should now put your content in a location of your choice and edit the root configuration directive in the nginx configuration file /etc/nginx/nginx.conf.
For information on Red Hat Enterprise Linux, please visit the Red Hat, Inc. website. The documentation for Red Hat Enterprise Linux is available on the Red Hat, Inc. website.