Checking which nodes are active and which are down

Question

I was wondering if there is anyone to determine which nodes are currently down (no internet or machine error) without going on every node.

Answer 1

You can use getpeerinfo to get a list of connected nodes. Assuming you're in a small network and there's no firewall preventing nodes from connecting to each other, by default every active node will be connected to every other, so you can just see who's missing.