title: How to give URL to scrapy for crawling?
body: <p>I want to use scrapy for crawling web pages. Is there a way to pass the start URL from the terminal itself?</p>
  
  <p>It is given in the <a href="http://doc.scrapy.org/en/0.12/topics/commands.html#std:command-crawl" rel="noreferrer">documentation</a> that either the name of the spider or the URL can be given, but when i given the url it throws an error:</p>
  
  <p>//name of my spider is example, but i am giving url instead of my spider name(It works fine if i give spider name).</p>
  
  <blockquote>
    <p>scrapy crawl example.com                 </p>
  </blockquote>
  
  <p>ERROR:</p>
  
  <blockquote>
    <p>File
    "/usr/local/lib/python2.7/dist-packages/Scrapy-0.14.1-py2.7.egg/scrapy/spidermanager.py",
    line 43, in create
        raise KeyError("Spider not found: %s" % spider_name) KeyError: 'Spider not found: example.com'</p>
  </blockquote>
  
  <p>How can i make scrapy to use my spider on the url given in the terminal??</p>