nagios-centos7-ram-plugin

#!/bin/bash
#Aurthor:Muhammad Asim
#Date:14-Mar-18



TOTALRAM=`free -m | awk '{print $2}' | sed -n 2p`
#TR=`free -m | awk '{print $2}' | sed -n 2p | cut -c1-2`

#AVAILABLERAM=`free -m | awk '{print $7}' | cut -c1-3`
AR=`free -m | awk '{print $7}' | sed -n 2p`

#USEDRAM=`echo $TOTALRAM - $AVAILABLERAM | bc`   In Ubuntu you might need this

USEDRAM=`free -m | awk '{print $3}' | sed -n 2p`

#USEDRAMNODEC=`free -m | awk '{print $3}' | cut -c1 | sed -n 2p`
GIGA="G"
MB="MB"

#echo -e "\nTotal RAM is $TOTALRAM$MB\n"

#echo -e "\nAvailable RAM is"$AVAILABLERAM$MB"\n"

#echo -e "\nUsed RAM is $USEDRAM$MB\n"

if [ "$AR" -ge "2048" ]
then
echo "Ok - Available RAM is "$AR""$MB" out of Total "$TOTALRAM""$MB""
    exit 0



elif [ "$AR" -gt "1500" ]
then
    echo "WARNING - Available RAM is "$AR""$MB" out of Total "$TOTALRAM""$MB""
    exit 1



elif [ "$AR" -lt "1024" ]
then

    echo "Critical -  Available RAM is "$AR""$MB" out of Total "$TOTALRAM""$MB""


    exit 2

else
    echo "UNKNOWN Centos-7 RAM Settings, please adjust numbers with according to your Host"
    exit 3
fi

#END