title: How to empty a redis database?
body: <p>I've been playing with redis (and add some fun with it) during the last fews days and I'd like to know if there is a way to empty the db (remove the sets, the existing key....) easily.<br>
  During my tests, I created several sets with a lot of members, even created sets that I do not remember the name (how can I list those guys though ?).<br>
  Any idea about how to get rid of all of them ?</p>