Htop

Htop is an interactive processes viewer for Linux systems. It is practically a top-like tool, but it displays information about system in colourful and intuitive way, and allows for output scrolling. You can read up more in the comparison article Htop versus Top in Linux (opens new window) or follow straight technical explanations in Htop explained - Explanation of everything you can see in htop/top on Linux. (opens new window)

Linux

Install htop with the following:

sudo apt install htop

Then to start htop, simply run:

htop