Test Server conenctivity

pingall.sh

#!/bin/bash
# Program name: pingall.sh
# Author: https://askubuntu.com/users/127327/souravc
# Source: https://askubuntu.com/questions/413367/ping-multiple-ips-using-bash
date
cat thesis-servers.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