I love these. Been a fan of minimal bash stuff. Here's a proof of concept for a intra-cluster load balancer in 40 lines of bash done during a hackathon I organized to promote distributed infra with Docker, Mesos, etc. about a decade ago https://github.com/cell-os/metal-cell/blob/master/discovery/...

I likely lost it, but I had a redundand and distributed reverse SSH tunnel based colo-to-cloud transfer tool.

Shell Fu and others have good collections of these https://www.shell-fu.org/