Ubuntu下nginx设置反向代理：

apt-get install nginx

vi /etc/nginx/sites-enabled/default

location / {
proxy_pass http://127.0.0.1:8081;
proxy_redirect http://127.0.0.1:8081   $scheme://127.0.0.1:8080;
proxy_set_header Host $host:$server_port;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto  $scheme;
}

:wq

service nginx restart

然后访问http://ip即是访问8081端口对应的服务

改nginx端口：

直接改default文件里的listen 端口即可

listen 8080 default_server;