Add windows to grub2
I had to install Ubuntu 18.04 after Windows. I lost Windows from grub. I used" Boot Recovery " to return the hornbeam to the Root of /dev/sda. Then, using grub customize, I added Windows. Outputs this error.
enuentry "Windows 8" {
insmod part_gpt
insmod chain set root='(hd0,gpt2)'
chainloader /EFI/microsoft/BOOT/bootmgfw.efi
}
Help create the correct setup. Windows is located in /dev/sda2 (Drive C).
1 answers
In most cases, manual editing of the grub2 config (grub.cfg) is redundant and counterproductive - this file is generated by a special script. Also, the same script is run automatically, for example, when updating the kernel. Among other things, this script finds the installed operating systems using the os-prober utility.
The specific name and how to run the script varies from distribution to distribution, but developers almost always leave a hint in the header of the file /etc/default/grub, for example on debian:
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
Thus, when starting update-grub (from root, of course), it must find all the installed OS and win itself.