multiple ping with bash

ping.sh

#!/bin/bash
# ping 
echo " "
echo Mengirim Ping !
echo "Tanggal : $(date)"
echo " "
cat node.txt | while  read output
do
    ping -c 1 $"output" > /dev/null
    if [ $? -eq 0 ]; then
    echo "node $output is up"
    else
    echo "node $output is down"
    fi
done