cpustatus

This script is useful to monitor current the status of the Rpi's CPU – clock rate, voltage, temperature, see example of its usage below:

As superuser whilst logged in as pi@raspberrypi
  from command line in the following directory /bin using the following command
  sudo nano cpustatus copy the script below and save...

#!/bin/bash
# cpustatus
#
# Prints the current state of the CPU like temperature, voltage and speed.
# The temperature is reported in degrees Celsius (C) while
# the CPU speed is calculated in megahertz (MHz).

function convert_to_MHz {
let value=$1/1000
echo "$value"
}

function calculate_overvolts {
# We can safely ignore the integer
# part of the decimal argument
# since it's not realistic to run the Pi
# at voltages higher than 1.99 V
let overvolts=${1#*.}-20
echo "$overvolts"
}

temp=$(vcgencmd measure_temp)
temp=${temp:5:4}

volts=$(vcgencmd measure_volts)
volts=${volts:5:4}

if [ $volts != "1.20" ]; then
overvolts=$(calculate_overvolts $volts)
fi

minFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq)
minFreq=$(convert_to_MHz $minFreq)

maxFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq)
maxFreq=$(convert_to_MHz $maxFreq)

freq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)
freq=$(convert_to_MHz $freq)

governor=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)

echo "Temperature: $temp C"
echo -n "Voltage: $volts V"
[ $overvolts ] && echo " (+0.$overvolts overvolt)" || echo -e "\r"
echo "Min speed: $minFreq MHz"
echo "Max speed: $maxFreq MHz"
echo "Current speed: $freq MHz"
echo "Governor: $governor"

exit 0

Finally to make it accessible to all users
  from command line in directory /bin using the following command
  sudo nano chmod 777 cpustatus
  thereafter cpustatus is accessable to all users without restriction...

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