I don't understand what this means, I found it in root's email this morning: To log into the recovery system via ssh set up /root/.ssh/authorized_keys or specify SSH_ROOT_PASSWORD WARNING: /usr/lib/grub/x86_64-efi/moddep.lst not found, grub2-mkimage will likely fail. Please install the grub2-efi-x64-modules package to fix this. ERROR: Error occurred during grub2-mkimage of BOOTX64.efi Aborting due to an error, check /var/log/rear/rear-fcshome.log for details /bin/sh: line 1: 30339 Terminated /usr/sbin/rear mkrescue It is possible it has happened before, as until recently I haven't paid a lot of attention to root's email (I know, I know,... bad me). but I wonder what it's all about... I have not knowingly ever used "rear" or "mkrescue". BTW, this is on an up to date Centos-7 X86-64 machine. Thanks in advance! Fred