We do not need
rsyncd keep running and cost our precious memory, in fact most of us only use it once in a while for backup.
So we need a way to keep our sync service on without the
xinetd is a service that can open network based services only when they are connected.
xinetd listens to a port, while the traffic comes in,
xinetd could launch the real service program and transfer traffic to it.
We can create a file
/etc/xinetd.d/rsync filled with codes below.
Other configs in
/etc/rsyncd.passare just like what they were when you are using