php deployer를 사용해보려고 하는데 사이트를 참고해도 도저히 모르겠네요 ㅠㅠ

composer를 이용하여 설치하고 손을 못대고 있습니다...

deployer 명령어인 

$ dep deploy production 를 입력하면 

-bash: dep: command not found 라고 뜨고... 설정파일 부분에서도 

<?php

// All Deployer recipes are based on `recipe/common.php`.
require 'recipe/symfony.php';

// Define a server for deployment.
// Let's name it "prod" and use port 22.
server('prod', 'host', 22)
    ->user('name')
    ->forwardAgent() // You can use identity key, ssh config, or username/password to auth on the server.
    ->stage('production')
    ->env('deploy_path', '/your/project/path'); // Define the base path to deploy your project to.

// Specify the repository from which to download your project's code.
// The server needs to have git installed for this to work.
// If you're not using a forward agent, then the server has to be able to clone
// your project from this repository.
set('repository', 'git@github.com:org/app.git');

server의 prod와 forwardAgent, stage에 뭘 입력하라는건지 알수가 없네요ㅠㅠ

고수님들 도와주세요!