Re: [CentOS] Fixing grub/shim issue Centos 7

Am 04.08.2020 um 08:31 schrieb lpeci lpeci@roa.es:

Hi all,

I had the same problem with my UEFI bios machine and I fixed it so for Centos 7:

1. Boot from an rescue linux usb

2. When the rescue system is running:

   2.1) #chroot /mnt/sysimage

3. Config network:

   3.1) # ip addr add X.X.X.X/X dev X

   3.2) # ip route add default via X.X.X.X <--- default router

4. And finally:

   #yum downgrade shim* grub2* mokutil

As there are updated and working packages available now, downgrading is no longer needed, another update will also work.

# yum makecache # yum upgrade

You should see a shim-x64 package with version 15.8 which is the working version (15.7 caused the problem)

#exit

#reboot

I hope you can fix it with these steps.