How to Ping all the hosts in hosts file in Linux

Did you know you can ping all the hosts listed in the /etc/hosts file with one command? Do it with

for i in `grep -v “^#” /etc/hosts | awk ‘{print $1}’`; do ping -c 1 -w 2 $i ; echo; done

THanks to  http://techgurulive.com/2009/04/24/how-to-ping-all-the-hosts-in-hosts-file-in-linux/