Install

yum install lm-sensors

## 'yum' above for CentOS, 'apt-get' if you are using Ubuntu

sensors-detect
sensors

## if sensors-detect does not work, and above lm-sensors command does says 'nothing to do', try below instead

yum install lm_sensors.x86_64

...

watch -n 1 -d sensors

## continuously prints and highlights changes

k10temp-pci-00c3 (on Ubuntu 20.04)

 This sensor is provided by the k10temp kernel module which handles the AMD CPU.

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1: +67.0°C

enp68s0-pci-4400
Adapter: PCI adapter
PHY Temperature: +84.0°C

k10temp-pci-00c3
Adapter: PCI adapter
Tdie: +93.0°C (high = +70.0°C)
Tctl: +93.0°C

## ^ this is pretty hot

Known-oddities with lm_sensors

It doesn't work well with CentOS 8.x. It only does one sensor, but it is not clear on what that sensor tracks.