#!/bin/bash
#Filename: disklog.sh
#Description: Monitor disk usage health for remote systems


logfile="diskusage.log"

if [ -n $1 ]
then
  logfile=$1
fi

if [ ! -e $logfile ]
then
  
  printf "%-8s %-14s %-9s %-8s %-6s %-6s %-6s %s\n" "Date" "IP address" "Device" "Capacity" "Used" "Free" "Percent" "Status" > $logfile
fi

IP_LIST="127.0.0.1 0.0.0.0"
#provide the list of remote machine IP addresses 

(
forip in $IP_LIST;
do

  sshslynux@$ip 'df -H' | grep ^/dev/ > /tmp/$$.df

  while read line;
  do
    cur_date=$(date +%D)
    printf "%-8s %-14s " $cur_date $ip
    echo $line | awk '{ printf("%-9s %-8s %-6s %-6s %-8s",$1,$2,$3,$4,$5); }'
    
  pusg=$(echo $line | egrep -o "[0-9]+%")
  pusg=${pusg/\%/};
  if [ $pusg -lt 80 ];
  then
    echo SAFE
  else
    echo ALERT
  fi
  done < /tmp/$$.df
done

) >> $logfile