This is the snap for htop, an interactive process viewer.
It works on Ubuntu, Fedora, Debian, and other major Linux distributions.
sudo snap install htop
That'll install the latest stable release of htop.
Or, if you're feeling adventurous, try the Launchpad autobuilds for the next major release from the edge channel:
sudo snap install htop --edge
Once installed, this snap can optionally be connected to some extra plugs:
sudo snap connect htop:mount-observe
sudo snap connect htop:network-control # DELAYACCT support