title: rails cannot load such file -- mysql2/mysql2 (LoadError)
body: <p>I am newbie to ruby on rails i could not find the solution for this error:</p>
  
  <pre><code>rails s
  </code></pre>
  
  <hr>
  
  <pre><code>/usr/local/share/gems/gems/mysql2-0.3.13/lib/mysql2.rb:8:in `require': cannot load such file -- mysql2/mysql2 (LoadError)
  from /usr/local/share/gems/gems/mysql2-0.3.13/lib/mysql2.rb:8:in `&lt;top (required)&gt;'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
  from /usr/local/share/gems/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
  from /home/Harish/Documents/simple_cms/config/application.rb:7:in `&lt;top (required)&gt;'
  from /usr/local/share/gems/gems/railties-4.0.0/lib/rails/commands.rb:76:in `require'
  from /usr/local/share/gems/gems/railties-4.0.0/lib/rails/commands.rb:76:in `block in &lt;top (required)&gt;'
  from /usr/local/share/gems/gems/railties-4.0.0/lib/rails/commands.rb:73:in `tap'
  from /usr/local/share/gems/gems/railties-4.0.0/lib/rails/commands.rb:73:in `&lt;top (required)&gt;'
  from bin/rails:4:in `require'
  from bin/rails:4:in `&lt;main&gt;'
  </code></pre>