h2(#rvm). Option 1: Install with rvm
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-<pre><code>~$ <span class="userinput">\curl -sSL https://get.rvm.io | bash -s stable --ruby=2.1</span>
+<pre><code>~$ <span class="userinput">gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3</span>
+~$ <span class="userinput">\curl -sSL https://get.rvm.io | bash -s stable --ruby=2.1</span>
~$ <span class="userinput">gem install bundler
</span></code></pre></notextile>