This is not about using whatsapp as an SSH client, I presented the whole thing wrong. My main concern, is, when you have programs that run in the real world, t

This is not about using whatsapp as an SSH client, I presented the whole thing wrong. My main concern, is, when you have programs that run in the real world, they sometimes break without you even being able to fix the screwups. I use whatsapp just to remotely run predefined functions, no SSH involved. I agree that allowing SSH would be a real issue, and better use an SSH client for that purpose. But then, let me just clarify one thing for the people thinking that "Oh Whatsapp is owned by facebook it's evil". Do you really think that app on your Android device or your iPhone device will be foolproof secure? Both are owned by Google and Apple, there are some drawbacks. But tinkering about what if and what not is not my business. It does the job and if someone really wants to hack me, it's not that SSH app on my phone that will prevent him or her. Programs break, like humans, this is just a way of giving a quick aspirine shot when I am not in front of my computer, which happens seldomly, but still. I like the fact that when I wake up, i can message my server "start_tests with some new parameter" and he does the job while I enjoy my coffee. Cronjobs have to be defined beforehand, this is meant to be dynamic. Don't allow shell access if you don't want.