Monitor-Read Hardware Sensors; temperature, voltage, fan speed
# apt-get install lm-sensors # sensors-detect # sensors
example output of sensors
# sensors k10temp-pci-00c3 Adapter: PCI adapter temp1: +57.4°C (high = +70.0°C) (crit = +105.0°C, hyst = +104.0°C)
lm-sensors debian