Simple system monitor

monitor.sh

#!/bin/bash

interval=5
intervalLong=300

function getSensors {
  sensors | awk 'BEGIN {FS=":?  +"} /^Core|^fan[12]|^temp/ {printf "%9s %9s\n", $1, $2}'
}

function getDiskfree {
  df -hP | sort -rnk5 | awk '/[89][0-9]%|100%/ {printf "%9s %9s   %s\n", $4, $5, $6}'
}

function getHddtemp {
  hddtemp /dev/sda /dev/sdb | awk 'BEGIN {FS=": "} // {printf "%9s %9s   %s\n", $1, $3, $2}' 2>/dev/null
}

function outRefresh {
  echo -e "\n\n\n\n\n\n\n\n\n\n\n"
  echo "$outSensors"
  
  echo
  echo "$outDiskfree"
  
  if [ ${#outHddtemp} -gt 0 ]; then
    echo
    echo "$outHddtemp"
  fi
  
  echo
  echo -n "$(uptime)"
}

function trapInt {
  outSensors=$(getSensors)
  outDiskfree=$(getDiskfree)
  outHddtemp=$(getHddtemp)
  outRefresh
  echo -ne "\nPress ^C again quickly to quit"
  
  trap SIGINT
  sleep 1
  trap trapInt SIGINT
}

trap trapInt SIGINT

while true; do
  outDiskfree=$(getDiskfree)
  outHddtemp=$(getHddtemp)
  for (( i=0 ; i<$(($intervalLong/$interval + 1)) ; i++ )); do
    outSensors=$(getSensors)
    outRefresh
    sleep $interval
  done
done

output.txt

   Core 0   +43.0°C
   Core 1   +43.0°C
     fan1  1371 RPM
     fan2  1110 RPM
    temp1   +36.0°C
    temp2   +43.0°C
    temp3   +83.0°C

     1.7G       99%   /mnt/datenhalde
     1.3G       97%   /mnt/deb-home
     8.0G       96%   /mnt/gralde2
      11G       80%   /home
      32G       80%   /mnt/gralde4

 /dev/sda      38°C   WDC WD3200AAKS-00L9A0
 /dev/sdb      39°C   WDC WD5000AADS-00M2B0

 10:25:01 up 6 days, 10:46, 29 users,  load average: 0.02, 0.01, 0.00