grub2-switch-to-blscfg man page

grub-switch-to-blscfg [--grub-directory=DIR] [--config-file=FILE] [--grub-defaults=FILE]

grub-switch-to-blscfg reconfigures grub-mkconfig to use BLS-style config files, and then regenerates the GRUB configuration.

--grub-directory=DIR

Search for grub.cfg under DIR.  The default value is /boot/efi/EFI/VENDOR on UEFI machines and /boot/grub2 elsewhere.

--config-file=FILE

The grub config file to use.  The default value is /etc/grub2-efi.cfg on UEFI machines and /etc/grub2.cfg elsewhere.  Symbolic links will be followed.

--grub-defaults=FILE

The defaults file for grub-mkconfig.  The default value is /etc/default/grub.

--bls-directory=DIR

Create BootLoaderSpec fragments in DIR.  The default value is /boot/loader/entries.

--backup-suffix=UFFIX

The suffix to use for saved backup files.  The default value is .bak.

info grub