RokeJulianLockhart@s1e8h4:~> sudo update-grub
[sudo] password for root:
sudo: update-grub: command not found
RokeJulianLockhart@s1e8h4:~> grub2-mkconfig -o /boot/grub2/grub.cfg
Absolute path to 'grub2-mkconfig' is '/usr/sbin/grub2-mkconfig', so running it may require superuser privileges (eg. root).
RokeJulianLockhart@s1e8h4:~> sudo grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found theme: /boot/grub2/themes/openSUSE/theme.txt
Found linux image: /boot/vmlinuz-6.5.6-1-default
Found initrd image: /boot/initrd-6.5.6-1-default
Found linux image: /boot/vmlinuz-6.5.4-1-default
Found initrd image: /boot/initrd-6.5.4-1-default
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Adding boot menu entry for UEFI Firmware Settings ...
done
RokeJulianLockhart@s1e8h4:~> systemctl reboot