grub – CentOS 8.2 does not boot after updating in 1 Aug 2020


I updated my CentOS 8.2 yesterday (yum update), everything was good until a rebooted my system, there was no boot loader! the system get stuck in a black window without showing anything at all.indeed the problem is grub. I tried to re-config my grub (grub2-mkconfig) by using CentOS 8.2 rescue mode (booted by the DVD ISO), nothing happened.

information:

  • my system is EFI (not legacy BIOS)
  • in the update process both grub and kernel updated as I remember