Clever control sequence for pre-used console commands

You know how it is, you open a new terminal window assured you know the command you want to use you make a cup of coffee and then you forget the command you where to use. Obviously you need better coffee! Or you can press the "Control Key + r" and your command prompt is replaced with this

(reverse-i-search)`':

Introduction

Much has been written recently about the search facilities in the new Microsoft® Windows Vista and how wonderful it is. Well, I'm here to tell you that Kubuntu and Ubuntu have an equally good search function that will hold its own against alternative systems.