Install asmon by entering the following commands in the terminal:
sudo apt update sudo apt install asmon
Description:
system resource monitor dockapp for Afterstep and WindowMaker
Asmon is a wharfable/dockable application that with meters detailing CPU, memory, swap, and X mem usage. It also includes the exact numbers for load average, mem, swap and X mem usage. Asmon was developed to use very little CPU itself.
Homepage: http://rio.vg/asmon/
Version: 0.71-5.1build1
Section: universe/x11