rpi-temp-check/rpi-temp.sh

#!/bin/bash
ALERT=0
CORE=1
SENSORS=/usr/bin/sensors

for N in `$SENSORS|grep Core|cut -f 2 -d "+" | cut -f 1 -d "."`
do
        if [ $N -gt "80" ];
        then
                echo "ALERT: CPU core $CORE temperature to high, $N degrees Celcius"
                ALERT=1
        else
                echo "OK: CPU core $CORE Temperature $N degrees Celcius"
        fi
        CORE=$((CORE+1))
done

if [ $ALERT -eq "1" ];
then
        exit 2
else
        exit 0
fi