On a fresh Linux install the first thing I install is htop which is a top-like monitor tool, but better.
Here is a screenshot of it on my Debian Linux, taken some years ago:
Some months ago I've sold my IBM T60 laptop and bought a Macbook Pro, so now I'm using Mac OS X instead of Linux on the laptop. But I still want to have
htop available so let's see how to install it.
First install macports and once you have it installed, you will be able to install a lot of software just like in Linux. For
htop just run:
sudo port install htop
Now you have it installed, here is how it looks like in my Macbook