Loadtemp bash script

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This shellscript prints the date, load average as well as the motherboard and CPU temperature (in microcelsius) in a single row once every minute. In order to work, you need to have a functioning sensors setup.

#!/bin/bash

# Edit these according to your local settings
moboTempSensor="/sys/devices/platform/i2c-9191/9191-0290/temp1_input"
cpuTempSensor="/sys/devices/platform/i2c-9191/9191-0290/temp3_input"
interval=60

while [ /bin/true ]
do
  dat=`date '+%Y.%m.%d-%H:%M:%S' | tr -d '\n'`
  load=`cut -f 1 -d ' ' /proc/loadavg`
  mobo=`cat ${moboTempSensor}`
  cpu=`cat  ${cpuTempSensor}`
  echo "${dat} ${load} ${cpu} ${mobo}"
  sleep ${interval}
done

Then run it for example like this:

/loadtemp.sh | tee -a /tmp/loadtemp.log

And when you have collected enough data, you can visualize it by running the following commands in gnuplot:

set autoscale
set xtic auto
set ytic auto
set y2tic auto
set ylabel "Temperature (C)"
set y2label "Load"
set yrange [20:60]
set y2range [0:3]
set timefmt "%Y.%m.%d-%H:%M:%S"
set xdata time
set xrange ["2006.11.13-00:00:00":"2006.11.21-00:00:00"]
set format x "%Y.%m.%d"
set terminal png medium notransparent picsize 1280 960
set output "/tmp/loadtemp.png"
plot "/tmp/loadtemp.log" using 1:2 title 'load' axes x1y2  with lines, \
     "/tmp/loadtemp.log" using 1:($3/1000) title 'CPU' with lines, \
     "/tmp/loadtemp.log" using 1:($4/1000) title 'Motherboard'  with lines

And you have a nice 1280x960 png in /tmp/ which shows the temperature changes like this one. You need to adjust the yrange, y2range as well as xrange according to your dataset.