yes it exist. thanks On Fri, 2020-04-03 at 15:00 -0400, Jonathan Billings wrote: > On Fri, Apr 03, 2020 at 09:40:09PM +0300, Georgios wrote: > > Yes > > > > dmesg | grep "EFI v" > > [ 0.000000] efi: EFI v2.70 by American Megatrends > > That's not always the best test, you should look for the existence of > /sys/firmware/efi to determine if you're using an EFI system. > > 'grubby' knows to update the configuration file for Legacy vs. UEFI. >