ping loop

I've run into a situation where I want to keep my eye on specific laptops when they come online during a pentest each day. I have a big list of files inhosts.txt and anytime I want to see which ones are online:

Quick ping loop through a text file full of hosts

while read -r host; do ping -c 2 -i 0.2 -W 1 "$host"; done < hosts.txt