There's a F/OSS app that uses SSH to execute the same command on multiple machines, saving the admin the pain of doing the same thing on each machine manually.
if you have ssh root keys setup then you could just do something like #!/bin/bash HOSTNAMES=`cat update-list.txt` for i in $HOSTNAMES dossh $i '/etc/init.d/ntpd stop && ntpdate ntp && /etc/init.d/ntpd start'
doneto run that task on many boxes quickly - you can do this for just about anything
