How can I show the CPU temperature in the GNOME panel?

Solution 1:

Try installing this extension for GNOME. It is called "Freon."

https://extensions.gnome.org/extension/841/freon/

Solution 2:

Yes, there is. It is called psensor. Install it (apt install psensor), and run it. It should pop up a window with tempratures:

Go to preferences, and configure it to start at startup, and only enable the panel icon:

You might want to fiddle with other settings as well. In the end you should have this:

(The little thermometer at the left.)

CPU, GPU, motherboard, and hdd temp sources are available. Make sure you have the sensors package installed.

The reason I added this answer to a question about a 10 year old Ubuntu is that it pops up at the first page of google searches for disk temperature in system tray ubuntu. Tested in 18.04.

Solution 3:

try this extension system-monitor you can choose the information to display like memory, cpu, temperature, etc..