Probably the most useful piece of software I've ever glued together was a tmuxinator script to bring up a dashboard that monitored system health using curl and

Probably the most useful piece of software I've ever glued together was a tmuxinator script to bring up a dashboard that monitored system health using curl and displaying status of each subsystem in large red/green words using figlet. Took me a night of work to get it right but it ran on a monitor in our engineering area, and one Quality/Ops peoples desktops for years.