Win2grub

Let me introduce you to my new favorite dual-booting companion: . What is win2grub ? win2grub is a lightweight script/tool for Windows that bridges the gap between the Windows Boot Manager and the GRUB bootloader. Instead of fighting your UEFI/BIOS for boot priority, win2grub sets the next boot to go directly to GRUB.

If you spend 80% of your time in Windows but hate the "reboot-and-spam-keys" dance, give win2grub a shot.

The old way: Save your work, restart, spam the Shift or F12 key, select the boot device, wait for GRUB, then select Linux.

We’ve all been there. You’re deep in a Windows session—maybe gaming or editing a video—and you need to switch to Linux for some coding or server work.

# save as `to-linux.bat` @echo off win2grub --set-next \EFI\ubuntu\grubx64.efi shutdown /r /t 5 (Runs the command and restarts in 5 seconds. Cancel with shutdown /a ) Did you accidentally delete GRUB? No problem. win2grub can also set Windows Boot Manager as the default:

win2grub solves the "90% Windows / 10% Linux" use case perfectly. You stay in Windows until you decide it’s Linux time. Under the hood, win2grub uses the Windows bcdedit utility to talk to the UEFI firmware. It tells your motherboard: "Hey, on the very next reboot, ignore the default boot order and launch GRUB first."

Disclaimer: This post describes a hypothetical tool for illustrative purposes. Always back up your EFI partition before modifying boot entries. bcdedit is powerful; run as Administrator.