How can I check CPU and GPU temperatures in Linux Mint?

I use Mangohud with a configuration tool called Goverlay. It offers plenty of info during gaming sessions, though I let my BIOS handle the cooling settings. If you're having trouble setting it up, make sure to check that any dependencies are properly installed.

I recommend installing 'btop'. It's a nice tool that provides an overview of all system metrics, including temperatures! You can install it using 'sudo apt install btop'. Just a heads up, it gives you live monitoring but won't log the highest temperatures.

If you're looking for something more visual, setting up Conky could be a good option. It can display temperatures directly on your desktop, so you can keep an eye without opening a separate window.

For a more custom solution, you can create a function in your terminal to read CPU temperatures from system files. Here's a quick script you could use:
```bash
get_temp() {
for zone in /sys/class/thermal/thermal_zone*/temp; do
[ -f "$zone" ] && awk '{printf "%.1f°Cn", $1/1000}' "$zone" && return
done
echo "N/A"
}
```
Just add that to your .bashrc to easily check temperatures later.

You can check CPU temperatures with the command 'sensors' and for your GPU, 'nvidia-smi' is the way to go. If you want to keep these readings updated, you can use the 'watch' command to refresh the output every few seconds.