> If you're allowed to take the system down, it's really easy - just boot up a live image and change the permissions. Having held a couple interviews like this

> If you're allowed to take the system down, it's really easy - just boot up a live image and change the permissions. Having held a couple interviews like this, if you suggest taking the system down, I'll tell you that would work -- now tell me another way to do it. It's still a plus that you suggested it, even if it isn't enough of an answer on its own.