Crash on my next step

After seeing few human mistakes that take down a fully redundant system - I have added a new tool to my belt.

Simply tell yourself the following, before doing any configuration change:

Doing the next planned step - I need to crash the whole system - How can I make it happen?

Now you'll look for ways that a crash can really happen, instead of being sure you know it won't.

Good luck, and break a leg - not the system.