Host Alive?

#!/bin/bash
echo -e "\t\tScript para verificar si un host esta caido o arriba.\n\t\t\t\tHector Cuevas Cruz"
echo -n "Host: "
read h
alive=`ping -c 1 -i .2 -w 1 $h | grep "received" | cut -d"," -f2 | egrep -o [0-9]`
dead=0

unknown=`ping -c 1 -i .2 -w 1 $h 2> out.ping`
cat=`cat out.ping`
if [ "$cat" == "ping: unknown host $h" ]; then
    echo -e "Host Desconocido\nSaliendo del programa..."
    rm -rf out.ping
    exit 0
fi

if [ $alive -eq $dead ]; then
    echo -e "Host Caido\n....Mandando mail...--->\n"
    echo "El host $h esta caido" | mail -s "Host Down" hecky

else
    echo "El host $h esta OK!!"
fi
rm -rf out.ping