Testing regular expressions tool (Linux/ubuntu)

Question

Hello,

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

Q: What is the best tool for testing/leadning regular expressions
   for linux/ubuntu?

Sorry if this is a superuser kind of question. Thx

Answer 1

Why don't use web-base tools: http://regexpal.com/ and more here

Answer 2

I rather like Kodos, which is a cross-platform GUI regex tester.

But there are many others. Have a look at the answers to http://stackoverflow.com/questions/2348694/how-do-you-debug-a-regex , there are many cross-platform solutions listed.