Nginx版本号默认是打开的，可以在默认的错误页面和http响应头中查看到
# vim /usr/local/nginx/conf/nginx.conf
http {
server_tokens off; # 找到server_tokens并设置为off
}# vim /usr/local/nginx/conf/fastcgi.conf
fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;
# 改为：
fastcgi_param SERVER_SOFTWARE nginx;
