title: Why is sed not recognizing \t as a tab?
body: <pre><code>sed "s/\(.*\)/\t\1/" $filename &gt; $sedTmpFile &amp;&amp; mv $sedTmpFile $filename
  </code></pre>
  
  <p>I am expecting this <code>sed</code> script to insert a <code>tab</code> in front of every line in <code>$filename</code> however it is not. For some reason it is inserting a <code>t</code> instead.</p>