title: How can I write a non-stop crawler with python and run it on a server?
body: <p>I want to write a <strong>scraper</strong> with python that crawl some urls and scrape and save datas.
  I know how can I write it as a simple program. I'm looking for a way to deploy it on my virtual server (running ubuntu) as a service to make it non-stop crawling.
  Could any one tell me How can I do this?</p>