Linux 在heroku中启动应用程序？什么是程序文件？“网络：”命令？
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Launching an app in heroku? What is procfile? 'web:' command?
提问by druuu
I was referring to this site as i am learning python/flask and trying to use heroku.
我指的是这个网站，因为我正在学习 python/flask 并尝试使用 heroku。
http://ryaneshea.com/lightweight-python-apps-with-flask-twitter-bootstrap-and-heroku
http://ryaneshea.com/lightweight-python-apps-with-flask-twitter-bootstrap-and-heroku
Let me explain what all I did, so that any one who is stuck like me can get the picture. I am using Linux Backtrack command line . 1. I started virtualenv and then installed flask virtualenv --distribute pip install flask
让我解释一下我所做的一切，以便任何像我一样被卡住的人都可以得到图片。我正在使用 Linux Backtrack 命令行 。1.我启动了virtualenv，然后安装了flask virtualenv --distribute pip install flask
Then, connected heroku and github, created a repo also in the github. Wrote a simple script and saved it in app.py
然后，连接heroku和github，也在github中创建了一个repo。写了一个简单的脚本并保存在app.py中
Then, asked to create a procfile! web: python app.py
然后，要求创建一个procfile！网络：python app.py
Questions. 1. What is procfile in layman terms? 2. When i type web: python app.py, it says 'web:: command not found'
问题。1. 外行的 procfile 是什么？2. 当我输入 web: python app.py 时，它说'web:: command not found'
Please elaborate how this works?
请详细说明这是如何工作的？
I have one more doubt, sudo is supreme user right? We are not supposed to use it in virtualenv? And for what exactly are we using virtualenv? A simple example.
我还有一个疑问，sudo 是最高用户对吗？我们不应该在virtualenv中使用它吗？我们究竟是为了什么而使用 virtualenv？一个简单的例子。
Questions are pretty basic. DO bare.
问题很基本。做裸体。
回答by John Beynon
the Procfile tells Heroku what commands should be run (https://devcenter.heroku.com/articles/procfile).
Procfile 告诉 Heroku 应该运行哪些命令（https://devcenter.heroku.com/articles/procfile）。
You are able to define difference process types, such as web (the only one which will autostart by default), workers, etc...
您可以定义不同的进程类型，例如 web（默认情况下唯一会自动启动的一种）、worker 等...
So basically a Procfile containing
所以基本上是一个包含
web: python app.py
is telling Heroku to started a named process called web, and to run python app.pywhen it starts.
告诉 Heroku 启动一个名为 web 的命名进程，并python app.py在它启动时运行。
There is Python specific documentation for Heroku at https://devcenter.heroku.com/articles/getting-started-with-python#declare-process-types-with-procfile
在https://devcenter.heroku.com/articles/getting-started-with-python#declare-process-types-with-procfile 上有 Heroku 的 Python 特定文档
