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Added 'Generate and sign GRUB EFI' to readme.md #123

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Added 'Generate and sign GRUB EFI' to readme.md #123

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Added 'Generate and sign GRUB EFI' in readme.md 
Added this to readme.md, it'll save someone a lot of time, it fixes grub rescue error, 

# GRUB with secure boot
```
# sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB --modules="normal test efi_gop efi_uga search echo linux all_video gfxmenu gfxterm_background gfxterm_menu gfxterm loadenv configfile tpm" --disable-shim-lock

Installing for x86_64-efi platform.
Installation finished. No error reported.

# sbctl sign -s /boot/efi/EFI/GRUB/grubx64.efi
✓ Signed /boot/efi/EFI/GRUB/grubx64.efi
// Reboot!
```
I was editing grub config to chainload EFI, though the solution was pretty simple.
#91 - I looked up this issue at this before I started messing with grub.config, as a noobie i couldn't do it  -I did grub-install and sign grubx64.efi but in /EFI/Manjaro/grubx64.efi which obviously didn't fix the issue. 
I also made lots of rookie mistakes which ill address with fixes, Hope this helps some noobie like me!
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@theomkumar
theomkumar authored Jan 17, 2022
commit 66cfa324c4b7d9c64e6d19c3e4bb6e284a15b214
12 changes: 12 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -187,3 +187,15 @@ Enrolled bundles:
Generating EFI bundles....
Wrote EFI bundle /efi/EFI/Linux/linux-linux.efi
```

# Generate and sign GRUB EFI
```
# sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB --modules="normal test efi_gop efi_uga search echo linux all_video gfxmenu gfxterm_background gfxterm_menu gfxterm loadenv configfile tpm" --disable-shim-lock

Installing for x86_64-efi platform.
Installation finished. No error reported.

# sbctl sign -s /boot/efi/EFI/GRUB/grubx64.efi
✓ Signed /boot/efi/EFI/GRUB/grubx64.efi
// Reboot!
```