learn raspberry pi at adafruit
https://www.engadget.com/2012/09/04/raspberry-pi-getting-started-guide-how-to/
3d printing with OctoPrint on the Raspberry pi
30 bucks for a computer.. lots of uses..
Amazon.com: Raspberry Pi 2 Model B Project Board – 1GB RAM – 900 MHz Quad-Core CPU: Computers & Accessories
https://www.raspberrypi.org/documentation/linux/usage/commands.md