#!/bin/bash

 EMAIL=''

 function sysstat {

 echo -e "

 #####################################################################

     Health Check Report (CPU,Process,Disk Usage, Memory)

 #####################################################################

 Hostname         : `hostname`

 Kernel Version   : `uname -r`

 Uptime           : `uptime | sed 's/.*up \([^,]*\), .*/\1/'`

 Last Reboot Time : `who -b | awk '{print $3,$4}'`

 *********************************************************************

 CPU Load - > Threshold <  Normal >  Caution , >  Unhealthy

 *********************************************************************

 "

 MPSTAT=`which mpstat`

 MPSTAT=$?

 if [ $MPSTAT !=  ]

 then

     echo "Please install mpstat!"

     echo "On Debian based systems:"

     echo "sudo apt-get install sysstat"

     echo "On RHEL based systems:"

     echo "yum install sysstat"

 else

 echo -e ""

 LSCPU=`which lscpu`

 LSCPU=$?

 if [ $LSCPU !=  ]

 then

     RESULT=$RESULT" lscpu required to producre acqurate reults"

 else

 cpus=`lscpu | grep -e "^CPU(s):" | cut -f2 -d: | awk '{print $1}'`

 i=

 while [ $i -lt $cpus ]

 do

     echo "CPU$i : `mpstat -P ALL | awk -v var=$i '{ if ($3 == var ) print $4 }' `"

     let i=$i+

 done

 fi

 echo -e "

 Load Average   : `uptime | awk -F'load average:' '{ print $2 }' | cut -f1 -d,`

 Heath Status : `uptime | awk -F'load average:' '{ print $2 }' | cut -f1 -d, | awk '{if ($1 > 2) print "Unhealthy"; else if ($1 > 1) print "Caution"; else print "Normal"}'`

 "

 fi

 echo -e "

 *********************************************************************

                              Process

 *********************************************************************

 => Top memory using processs/application

 PID %MEM RSS COMMAND

 `ps aux | awk '{print $2, $4, $6, $11}' | sort -k3rn | head -n `

 => Top CPU using process/application

 `top b -n1 | head - | tail -`

 *********************************************************************

 Disk Usage - > Threshold <  Normal > % Caution >  Unhealthy

 *********************************************************************

 "

 df -Pkh | grep -v 'Filesystem' > /tmp/df.status

 while read DISK

 do

     LINE=`echo $DISK | awk '{print $1,"\t",$6,"\t",$5," used","\t",$4," free space"}'`

     echo -e $LINE

     echo

 done < /tmp/df.status

 echo -e "

 Heath Status"

 echo

 while read DISK

 do

     USAGE=`echo $DISK | awk '{print $5}' | cut -f1 -d%`

     if [ $USAGE -ge  ]

     then

         STATUS='Unhealty'

     elif [ $USAGE -ge  ]

     then

         STATUS='Caution'

     else

         STATUS='Normal'

     fi

         LINE=`echo $DISK | awk '{print $1,"\t",$6}'`

         echo -ne $LINE "\t\t" $STATUS

         echo

 done < /tmp/df.status

 rm /tmp/df.status

 TOTALMEM=`free -m | head - | tail -| awk '{print $2}'`

 TOTALBC=`echo "scale=2;if($TOTALMEM<1024 && $TOTALMEM > 0) print 0;$TOTALMEM/1024"| bc -l`

 USEDMEM=`free -m | head - | tail -| awk '{print $3}'`

 USEDBC=`echo "scale=2;if($USEDMEM<1024 && $USEDMEM > 0) print 0;$USEDMEM/1024"|bc -l`

 FREEMEM=`free -m | head - | tail -| awk '{print $4}'`

 FREEBC=`echo "scale=2;if($FREEMEM<1024 && $FREEMEM > 0) print 0;$FREEMEM/1024"|bc -l`

 TOTALSWAP=`free -m | tail -| awk '{print $2}'`

 TOTALSBC=`echo "scale=2;if($TOTALSWAP<1024 && $TOTALSWAP > 0) print 0;$TOTALSWAP/1024"| bc -l`

 USEDSWAP=`free -m | tail -| awk '{print $3}'`

 USEDSBC=`echo "scale=2;if($USEDSWAP<1024 && $USEDSWAP > 0) print 0;$USEDSWAP/1024"|bc -l`

 FREESWAP=`free -m |  tail -| awk '{print $4}'`

 FREESBC=`echo "scale=2;if($FREESWAP<1024 && $FREESWAP > 0) print 0;$FREESWAP/1024"|bc -l`

 echo -e "

 *********************************************************************

              Memory

 *********************************************************************

 => Physical Memory

 Total\tUsed\tFree\t%Free

 ${TOTALBC}GB\t${USEDBC}GB \t${FREEBC}GB\t$(($FREEMEM *  / $TOTALMEM  ))%

 => Swap Memory

 Total\tUsed\tFree\t%Free

 ${TOTALSBC}GB\t${USEDSBC}GB\t${FREESBC}GB\t$(($FREESWAP *  / $TOTALSWAP  ))%

 "

 }

 FILENAME="health-`hostname`-`date +%y%m%d`-`date +%H%M`.txt"

 sysstat > $FILENAME

 echo -e "Reported file $FILENAME generated in current directory." $RESULT

 if [ "$EMAIL" != '' ]

 then

     STATUS=`which mail`

     if [ "$?" !=  ]

     then

         echo "The program 'mail' is currently not installed."

     else

         cat $FILENAME | mail -s "$FILENAME" $EMAIL

     fi

 fi