Update from Redhat 7.3 to CentOS 7.4
I didn't read any documents, but I added CentOS repos and jumped ahead into the upgrade from RHEL 7.3 to CentOS 7.4 and here are the problems I have seen and how I fixed them thanks to the Internet. First problem: The update itself didn't work complaining about man pages from PAM i686 conflicting with PAM x86_64. Solution: # yum reinstall pam Second problem: After the update has completed, when rebooting right after the BIOS finished its job, the system failed to boot, indeed it failed to load GRUB the boot loader with the message: Failed open \EFI\BOOT\grubx64.efi - Not Found Failed to load image \EFI\BOOT\grubx64.efi: Not Found start_image() returned Not Found Solution: - Get a bootable USB or CD of RHEL / CentOS 7.3. - Select "Rescue a Redhat Linux Installation" when presented with the CD / USB options. - Ensure you don't get any errors and that you got a message saying that your system has been mounted under /mnt/sysimage. # chroo