I'm trying to set up my system to use a USB stick with GRUB installed on it, so I can easily switch between Windows and Linux. The goal is to have my BIOS boot into Windows when the USB stick isn't plugged in, and boot into Linux when the USB is connected.
I've looked at a bunch of tutorials on how to install GRUB on a USB stick, but most of them focus on creating a Live Linux environment. I need help figuring out how to configure GRUB to boot an OS installed on a different drive. Any advice would be greatly appreciated!
4 Answers
Honestly, you could simplify this. Instead of using a USB, why not install GRUB on the main Linux disk? That way, you can choose which OS to boot without the hassle of plugging and unplugging. It’s way more reliable!
You can install GRUB on the USB, but booting from it while having the Windows installation as a fallback can be tricky. You might need to have GRUB on your main SSD to chainload the USB GRUB. It's definitely feasible, but it might take some tweaking to get right.
Would setting the boot order in BIOS to prioritize the USB over Windows solve the issue?
You’ll need to tweak the GRUB config file to point to the OS you want to boot from the USB. It can get confusing if you're not sure how these config files work, especially when it comes to booting from another drive.
Yeah, exactly! That’s where I’m struggling too—none of the guides clarify the configuration for accessing an OS on a different drive.
I’ve thought about doing this as well! If you installed a Live Debian or Ubuntu on the USB, you could use it to find other bootable OSs. This way, you wouldn’t have to mess with BIOS settings each time. Just a thought!
I totally get that, but I really want a physical way to switch between the two without messing with settings every time.