I do not want to discuss it) You already confused in his words and contradict what was said earlier. In fact, this configuration looks like rsync or scp. I use `chef` for sever configuration, `runit` as supervisor for example, but I do not mean that all use it ))) 

had a task before me to show you that the suggested configuration is not universal and it has a few drawbacks. look at the config files that are in the network. You see there are many examples of use. Restrict the user, and not the more experienced guide in a bad way - does not paint you.