Adding Grub to Systemd-boot boot menu

Adding loader entry for Grub of another distribution to Systemd-boot loader entries menu on the same computer is relatively easy. It is basically adding shimx64.efi which will point to Grub of another distribution. The file usually reside at /EFI/distroname/shimx64.efi.

For example, to dual boot Arch Linux using EFI and Systemd-boot and Debian which is going to be installed after Arch Linux, generally;

• a partition to host Debian

• point /boot partition to the existing partition, for example, /dev/sda1 which is being used by existing Arch Linux as /boot partition during Debian installation process.

• Debian installation will create /EFI/debian directory on the /dev/sda1 for instance and shimx64.efi in that directory.

• then read https://wiki.archlinux.org/title/systemd-boot#Adding_loaders to add loader entry pointing to Grub of Debian. See the following example;

/boot/loader/entries/debian.conf

title Debian Grub

linux /EFI/debian/shimx64.efi