title: Groups of compound conditions in Bash test
body: <p>I want to have some groups of conditions in a Bash <em>if</em> statement. Specifically, I'm looking for something like the following:</p>
  <pre><code>if &lt;myCondition1 and myCondition2&gt; or &lt;myCondition3 and myCondition4&gt; then...
  </code></pre>
  <p>How may I group the conditions together in the way I describe for use with one <em>if</em> statement in Bash?</p>