Everybody going on about log4j and here I am, reminded at how people kept scoffing at me for being "elitist" because I don't run any Java or PHP software.
Yeah, I'm really paying the price for trying to keep a baseline quality of software I deploy, ain't I? 
@jonn I currently only have C, Go and python software deployed on my server.
There's a couple other languages I'd also deploy, but I've been trying to keep the set of languages small when possible. :)