title: execute one-line ssh command with variable from local environment
body: <p>Let's pretend that in the current shell, I have a variable.</p>
  <pre><code>$ echo $MY_VAR
  $ 2
  </code></pre>
  <p>What I want is to pass the value of this variable to an argument of a command I'm executing through ssh, like:</p>
  <pre><code>ssh -i /ebs/keys/test root@some.ip '/some/command -&lt;here_i_want_to_have_value_of_$MY_VAR_variable&gt;'
  </code></pre>
  <p>Thanks!</p>