title: egrep search for whitespace
body: <p>I'm trying to use egrep with a regex pattern to match whitespace. </p>
  
  <p>I've used RegEx with Perl and C# before and they both support the pattern <code>\s</code> to search for whitespace. egrep (or at least the version I'm using) does not seem to support this pattern.</p>
  
  <p>In a few articles online I've come across a shorthand [[:space:]], but this does not seem to work. Any help is appreciated.</p>
  
  <p>Using: SunOS 5.10</p>