title: Search for tabs, without -P, using 'grep'
body: <p>I used to use <code>grep -P</code> successfully earlier, till I got a machine where grep is not compiled with Perl regular expression support. Now I am having trouble matching tabs:  <code>\t</code> character,</p>
  
  <pre><code>grep -G '\t' matches a literal 't'
  grep -E '\t' matches a literal 't'
  </code></pre>
  
  <p>How do I match tabs?</p>