Install wmbubble by entering the following commands in the terminal:
sudo apt update sudo apt install wmbubble
Description:
system-load meter for Window Maker that features a duck
A Window Maker dockapp (though it does not specifically require the Window Maker window manager) that indicates the system load. . The more profuse the bubbles, the higher the CPU usage. The higher the water, the more memory being used. . Up to two user-specified programs may be launched from this dockapp.
Homepage: https://github.com/rnjacobs/wmbubble
Version: 1.53-2build1
Section: universe/x11