Updating Nagios Clients



I have over 100 Nagios monitored systems, and I want to find an easy way to update the client software. Given that Nagios is already periodically connecting to each of these machines, is there a way to get Nagios to update it’s own client files? What I have in mind is do-able in Linux from the command line using (say) rsync so I wonder if it is possible to create a command which will achieve what I want?