title: Concatenating variables in Bash
body: <p>I am trying to add a variable to the middle of a variable, so for instance in PHP I would do this:</p>
  <pre><code>$mystring = $arg1 . '12' . $arg2 . 'endoffile';
  </code></pre>
  <p>so the output might be <code>20121201endoffile</code>, how can I achieve the same in a linux bash script?</p>