Shell Programming and Scripting

echo "Is it a DB Host? (Y/y/N/n)"
read YN
if [ "$optYN" != "n" -a "$optYN" != "N" ]
then
echo "Please enter the hostname"
read Hname
echo "Status of Disk Space\c "
HOST_ENV=`uname`
Host_SUN="SunOS"
Host_AIX="AIX"


if [ "${HOST_ENV}" = "${Host_AIX}" ]
then
        df -k |awk '{print \$4}'|grep %|awk -F'%' '{print \$1}'|sed -e 's/^ *//'|sed -e '/^$/d'|while read LINE
        do
                threshold=90
                if [ $LINE -gt $threshold ]
                then
                        echo "Value exceeded for df -k|grep $LINE\%|awk '{print \$7}'echo "\c----->$LINE\c"

                fi
        done
elif [ "${HOST_ENV}" = "${Host_SUN}" ]
then
        df -k|awk '{print \$5}'|grep %|awk -F'%' '{print \$1}'|sed -e 's/^ *//'|sed -e '/^$/d'|while read LINE
        do
                threshold=90
                if [ $LINE -gt $threshold ]
                then
                        echo "Value exceeded for df -k|grep $LINE\%|awk '{print \$6}'echo "\c ----> $LINE\c"
                fi
        done
else
        echo "Disk Space Under threshold!!"

fi