title: Testing regular expressions tool (Linux/ubuntu)
body: <p>I searched for a question about regexp testing/learning tools, but people usually suggest Windows based solution. I found one for ubuntu: redit.
  However, I'm wondering if there are better tools for the job. So, without further ado</p>
  
  <pre>Q: What is the best tool for testing/leadning regular expressions
     for linux/ubuntu?</pre>
  
  <p>Sorry if this is a superuser kind of question.
  Thx</p>