How can I run a shell script when my Raspberry Pi starts up headless?
I don't want it to be dependent on booting into a console, or logging in, etc. It will literally be plugged into Ethernet and power, nothing else.
I saw this post on RPi SE. The answer was really thorough, but depended on things like logging in, booting to desktop, or booting to console.
How can I run a script on powerup, even if none of these things happen?