Hello friends!
I have a problem again!
In the last update there was a power failure and my NS is now stuck with GRUB.
Now I have only a minimalist GRUB system …
What can I do to get back a running system.
Many thanks for your help!!
Gerald
Easiest way is to restore a backup.
Otherwise boot the machine in rescue mode with a Centos or Nethserver DVD.
Enter the chroot and try to reinstall Grub and repair the yum transaction.
EDIT: I just changed the first sentence, thank you @m.traeumner for pointing out the mistake!
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Hello
mmmh, how do you say it works with the backup not quite …
I can see the partion in Grub Rescue mode but do not change anything.
I tried to start the system with the following entries:
set prefix = (hd0,1)/boot/grub2
set root = (hd0,1)
as
insmod linux
insmod normal
normal
to bring to life but unfortunately without success.
When I start with Rescue System from the Nethserver 7.5, I can mount and view and edit all partitions, but do not write a new configuration of grub2 …
Thus, no solution …
To chroot to your systems root and reinstall grub:
chroot /mnt/sysimage
/sbin/grub2-install /dev/sda
Here is a step-by-step guide:
https://www.tecmint.com/recover-or-rescue-corrupted-grub-boot-loader-in-centos-7/
5 Likes
I started with the ns7.5 image in the rescuesystem, but there is no grub2-install under sbin.
Is there a difference between the Image CentOS 7.5 and NS7.5 (except the add-on packages)?
You need to do step 5 - chroot first.
2 Likes
Thank you!
Now it works again, I had the instructions before but it did not work - because I had a broken image on the USB stick.
I have now taken another stick and downloaded a new image and everything worked immediately.
greetings
Gerald
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