I tried installing Ubuntu from USB-drive, I installed succesfully restarted the computer as asked but then I got into this GRUB bash-like terminal. I tried using this method: https://www.howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot/ but that didn't work. I really need to install this and I have no idea how to repair, I have no other operating system on the computer.
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sudo efibootmgr -v
to see details. https://askubuntu.com/questions/63610/how-do-i-remove-ubuntu-in-the-bios-boot-menu-uefi You may need to boot using a work around or hard drive entry: http://askubuntu.com/questions/150174/sony-vaio-with-insyde-h2o-efi-bios-will-not-boot-into-grub-efi – oldfred Jul 10 '18 at 03:40