#!/bin/bash 
#                       /usr/local/bin/linuxhealthcheck
#  http://crystalfaeries.net/posix/bin/linuxhealthcheck
# celeste:crystalfaery 2016-03-26 19:00:53+00:00
# http://downloads.linoxide.com/linuxhealthcheck.sh
EMAIL='root'
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 < 1 Normal > 1 Caution , > 2 Unhealthy 
*********************************************************************
"
MPSTAT=`which mpstat`
MPSTAT=$?
if [ $MPSTAT != 0 ]
then
	echo "Please install mpstat!"
	echo "On Debian based systems:"
	echo "sudo apt-get install sysstat"
	echo "On RHEL based systems:"
	echo "yum install sysstat"
else
echo -e ""
LSCPU=`which lscpu`
LSCPU=$?
if [ $LSCPU != 0 ]
then
	RESULT=$RESULT" lscpu required to produce accurate results"
else
cpus=`lscpu | grep -e "^CPU(s):" | cut -f2 -d: | awk '{print $1}'`
i=0
while [ $i -lt $cpus ]
do
	echo "CPU$i : `mpstat -P ALL | awk -v var=$i '{ if ($3 == var ) print $4 }' `"
	let i=$i+1
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 10`

=> Top CPU using process/application
`top b -n1 | head -17 | tail -11`

*********************************************************************
Disk Usage - > Threshold < 90 Normal > 90% Caution > 95 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 95 ] 
	then
		STATUS='Unhealty'
	elif [ $USAGE -ge 90 ]
	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 -2 | tail -1| awk '{print $2}'`
TOTALBC=`echo "scale=2;if($TOTALMEM<1024 && $TOTALMEM > 0) print 0;$TOTALMEM/1024"| bc -l`
USEDMEM=`free -m | head -2 | tail -1| awk '{print $3}'`
USEDBC=`echo "scale=2;if($USEDMEM<1024 && $USEDMEM > 0) print 0;$USEDMEM/1024"|bc -l`
FREEMEM=`free -m | head -2 | tail -1| awk '{print $4}'`
FREEBC=`echo "scale=2;if($FREEMEM<1024 && $FREEMEM > 0) print 0;$FREEMEM/1024"|bc -l`
TOTALSWAP=`free -m | tail -1| awk '{print $2}'`
TOTALSBC=`echo "scale=2;if($TOTALSWAP<1024 && $TOTALSWAP > 0) print 0;$TOTALSWAP/1024"| bc -l`
USEDSWAP=`free -m | tail -1| awk '{print $3}'`
USEDSBC=`echo "scale=2;if($USEDSWAP<1024 && $USEDSWAP > 0) print 0;$USEDSWAP/1024"|bc -l`
FREESWAP=`free -m |  tail -1| 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 * 100 / $TOTALMEM  ))%

=> Swap Memory

Total\tUsed\tFree\t%Free

${TOTALSBC}GB\t${USEDSBC}GB\t${FREESBC}GB\t$(($FREESWAP * 100 / $TOTALSWAP  ))%
"
}

FILENAME="/tmp/health-`hostname`-`date +%y%m%d`-`date +%H%M`.txt"
sysstat > $FILENAME
if [ "$EMAIL" != '' ] 
then
	STATUS=`which mail`
	if [ "$?" != 0 ] 
	then
		echo -e "Report file $FILENAME" $RESULT
	else
		mail -s "$FILENAME" $EMAIL < $FILENAME
	fi
fi