Question
Is Ubuntu instances boot with EFI or BIOS?
- Posted on January 30, 2021
- Ubuntu 20.04
Asked by nayklost
Hello, i have created Ubuntu 20.04 instance and during GRUB update i see GRUB was installed for UEFI. Its puzzles me since there is no /sys/firmware/efi in system and Ubuntu already have record of incorrect GRUB updates breaking system. So, is Ubuntu 20.04 instances is UEFI based or BIOS?
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Hi @nayklost,
You are correct, I just created a droplet and I can see that there is no folder /sys/firmware/efi. Ussually, as you’ve stated as well, the most common way to see if you’ve used UEFI to boot is if you have the folder /sys/firmware/efi.
Another way to see if you are using UEFI is to try and run the command:
efibootmgr
If it returns :
EFI variables are not supported on this system.
Then for sure, it’s not UEFI but BIOS.
Regards, KFSys
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.