Install xfce4-sensors-plugin by entering the following commands in the terminal:
sudo apt update sudo apt install xfce4-sensors-plugin
Description:
hardware sensors plugin for the Xfce4 panel
The sensors plugin provides a handy way to monitor your hard disk, processor, fans, and other critical hardware right on your Xfce panel.
Homepage: http://goodies.xfce.org/
Version: 1.2.6-1
Section: universe/x11