Replacing the rear brake rotors on a 1995 Porsche is much simpler than we expected, particularly when you have a good buddy with intimate knowledge of such things, but it is nevertheless kind of unpleasant when it’s 100 degrees outside; and
Bad nameservers in /etc/resolv.conf will prevent incoming SSH connections under BSD-derived *nices. Ergo, if your BSD-derived *nix server is hosted by boobs who take the rest of the colo down at the first sign of hurricanes — including their nameservers — you can expect all attempts to SSH thereto to fail. However, if your BSD-derived *nix server is one of these, you can fix this via this tool by adding some valid, non-boob-managed nameservers to /etc/resolv.conf.