title: How to grep for a line containing at most one forward slash?
body: <p>I'm trying to get the size of the top level directories under the current directory (on Solaris).  So I'm piping du to grep and want to match only those lines that have a single forward slash ie. the top level directories.</p>
  
  <p>Something like:</p>
  
  <pre><code>du -h | grep -e &lt;your answer here&gt;
  </code></pre>
  
  <p>but nothing I try works.  Help appreciated!</p>