StackOverflow2013

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12326124
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2012-09-07T22:17:31.747
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2017-02-13T00:26:17.863
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2017-02-13T00:26:17.863
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2
Score
33
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text
Body
It is officially answered in <a href="https://blog.engineyard.com/2010/everything-you-need-to-know-about-unicorn" rel="nofollow noreferrer">https://blog.engineyard.com/2010/everything-you-need-to-know-about-unicorn</a>: What is the unicorn executable? What is the unicorn_rails executable? The <code>unicorn</code> executable is a Rack-only tool modeled after Rack’s “rackup” and is recommended for Rack applications. <code>unicorn_rails</code> was made to be an easier transition for users of pre-Rack versions of Rails. The manpage encourages Rails 3 users to use plain <code>unicorn</code> instead. What’s the difference? From the <code>unicorn_rails</code> manpage, some conventions of <code>unicorn_rails</code> are modeled after <code>script/server</code> found in Rails. It creates directories under “tmp” like <code>script/server</code> and the <code>-E/–environment</code> switch sets <code>RAILS_ENV</code> instead of <code>RACK_ENV</code>. Apart from that, in my experience, some gems may need unicorn_rails in particular, like activeadmin (see <a href="https://github.com/gregbell/active_admin/issues/298#issuecomment-1589377" rel="nofollow noreferrer">this</a>) Also, <a href="http://unicorn.bogomips.org/unicorn_rails_1.html" rel="nofollow noreferrer">manpage:</a> <blockquote> It is designed to help Rails 1.x and 2.y users transition to Rack, but it is NOT needed for Rails 3 applications. Rails 3 users are encouraged to use unicorn(1) instead of unicorn_rails(1). Users of Rails 1.x/2.y may also use unicorn(1) instead of unicorn_rails(1). </blockquote>
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1. POwhat is the difference between unicorn and unicorn_rails?
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