title: Cannot run rails server
body: <p>I am starting to learn Ruby on Rails but have been stuck at the basic installation part for 2 days now. I was following a tutorial which mentions starting the server with the <code>rails server</code> command.</p>
  
  <p>Running this command, I get the following output:</p>
  
  <pre><code>$ rails server
  /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/execjs-1.4.0/lib/execjs.rb:5:in `&lt;module:ExecJS&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/execjs-1.4.0/lib/execjs.rb:4:in `&lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `&lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `&lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `&lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `each'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `block in require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `each'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler.rb:119:in `require'
      from /home/niranjan/fourth_app/config/application.rb:7:in `&lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `require'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `block in &lt;top (required)&gt;'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap'
      from /home/niranjan/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `&lt;top (required)&gt;'
      from script/rails:6:in `require'
      from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>I have been having several different problems and I have done <code>rvm implode</code> and reinstall several times. I have the rvm scripts in the PATH variable. </p>
  
  <pre><code>$ rvm -v
  
  rvm 1.15.7 (stable) by Wayne E. Seguin &lt;wayneeseguin@gmail.com&gt;, Michal Papis &lt;mpapis@gmail.com&gt; [https://rvm.io/]
  
   $ ruby -v
  ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
  
  
  $ rails -v
  Rails 3.2.8
  </code></pre>
  
  <p>I am using Linux Mint 12. Any help/suggestion would be appreciated.</p>
  
  <p>Thanks</p>