How to know Raspberrypi CPU Core temperature?

Knowing the Raspberrypi CPU Temperature is necessary in order to prevent damage to it. Too much heat can reduce the performance of the RaspberryPI, 85°C is too much, it can melt or explode it CPU.

48°C - 65°C temperature is quite reasonable depending on the usage.

To know theRaspberrypi CPU Core temperature simply key-in or copy and paste in the LXTerminal the code below:
sudo /opt/vc/bin/vcgencmd measure_temp

Look like this in the LXTerminal:
pi@raspberrypi:~ $ sudo /opt/vc/bin/vcgencmd measure_temp

You can also print the temperature every second using a python script. Just take a look at the code as follow.

-- + --

import os
import time

def measure_temp():
        temp = os.popen("vcgencmd measure_temp").readline()
        return (temp.replace("temp=",""))

while True:
        print(measure_temp())
        time.sleep(1)

-- + --

You can also modify the time.sleep into 5 seconds, take note that it measures in second not in a millisecond.