vi /etc/nginx/nginx.conf
配置文件中，http区段中插入“server_tokens off;”，重新载入配置文件
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
server_tokens off;
expires 5s;
sendfile on;
重载nginx配置文件
nginx -t
nginx -s reload
修改前
修改后