How to find out what process is using CPU to what extent in Ubuntu? I'd like to have real-time data as well as recorded history. Both console and GUI apps would be great.
The situation is that my system seems to be really overloaded right now and I don't know why for sure. I've spent some time killing processes and watching if performance improves. And I suspect that JS Scripts running in Mozilla are causing problems. All in all a nice tool for taking a look at CPU usage would come in handy.