prune_ssh_known_hosts
Simple checks of entries in .ssh/known_hosts
Motivation
I know that ssh'ing to nodes is an anti-pattern for modern scalable administration, but when you don't have all the nice tooling to avoid it, you still end up logging into lots of hosts.
My .ssh/known_hosts file had something like 900 entries, including lots of old dead hosts, and lots of duplicate entries for some odd reason.
This silly python script let me remove about 250 entries.