You would have come across GRUB bootloader in case if your are working on Linux systems. I first came accross this when i tried to install my favourite Debian Load Windows from GRUB https://unix.stackexchange.com/questions/259069/how-to-start-a-windows-partition-from-the-grub-command-line Load Debian from GRUB https://superuser.com/questions/1237684/how-to-boot-from-grub-shell Frequently Used GRUB Commands References https://www.redswitches.com/blog/grub-rescue-commands Troubleshooting GRUB Loading. https://www.linuxfoundation.org/blog/blog/classic-sysadmin-how-to-rescue-a-non-booting-grub-2-on-linux How Read more…