What is htop? It’s an interactive process viewer for Linux. It’s very similar to top, however htop enables you to scroll the list vertically or horizontally; as well as supporting mouse operation.
To install htop on Debian/Ubuntu distros, run this command:
$ sudo apt-get install htop
For openSUSE 10.2, you probably can install it with Yast, but I like smart:
$ sudo smart install htop