I learned by playing around with the Grub bootloader in Linux VMs launched with Vagrant. I deleted every non-essential line of code in the bootloader config, a

I learned by playing around with the Grub bootloader in Linux VMs launched with Vagrant. I deleted every non-essential line of code in the bootloader config, and then stared at it & the Grub docs until it made sense. My ultimate goal was learning how to turn a Linux container into a bootable VM.