title: How to remove characters before and including an underscore?
body: <p>In bash scripting what's an efficient way to do the following please?</p>
  
  <pre><code>var="fooo_barrrr"
  </code></pre>
  
  <p>What is the best way to remove all characters before and including the '_'  so that var becomes "barrrr" please?</p>