2
I finally got a way to fix this.
By pressing RIGHT 'shift', (the left shift doesn't work) the grub menu will show up.
Then I can select enter emergency mode, after that, OS boot into the shell, I can edit /etc/rc.local
2
The way you are using the interrupt routine is correct but only in x86 mode.
From Wikipedia:
on a modern x86 system, BIOS calls can only be performed in Real mode,
or Virtual 8086 mode. v8086 is not an option in Long mode.
I believe that a modern system does not boot in real mode, so you cannot use int 10 directly. Further, EFI systems don't read boot ...
2
On CentOS 7 network filesystem mounts depend on network-online.target.
The network-online.target is reached once an interface is up and an ip has been set. This presumes the first ip on the first interface to get up is enough for the hostname to be resoved. This is however doesn't have to be the case.
We can write systemd services to test if network is ...
2
Let's face the facts:
Debian is known to be stable and that's why I am on Debian, as well.
But let's face it, it comes with serious errors from time to time and those are hard to track down. If it works with the previous Kernel, consider it a bug! Really!
I had such problems now and then. Never was there a reason or it took weeks before the first bug-...
1
Remove some files with
sudo rm /sys/fs/pstore/dmesg-efi-*.enc.z
This has been reported before. See e.g.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902966;msg=10
. Others simply mention sudo rm /sys/fs/pstore/*, I am not certain it is needed.
At any rate, it seems that, if your system is working fine, you may get rid of the information in pstore.
...
1
I had the same problem on my Ubuntu 18.04 and was able to run journalctl by logging in on a separate kernel virtual terminal, as described above by JdeBP. Once I got to the bottom of the log, I discovered lots of out-of-space errors from the most recent boot attempts. A quick df showed my root filesystem had literally zero free space. I cleaned up some files ...
1
I managed to get FreeBSD 12.1-STABLE running on my OVH VPS by taking the following steps
Reboot in rescue mode from OVH's management panel. Once logged in (via SSH or KVM, either works), perform the following sequence of commands
Unmount your original filesystem with umount /dev/sdb*. Note that
the rescue system is mounted from /dev/sda. Don't touch /dev/...
1
But dual boot is exactly what you are referring to. Dual boot means that you have two separate oses on the same hard drive , be more specific about your problems with dual boot and maybe some help will come
1
Reboot in rescue mode from OVH's management panel. Once logged in (via SSH or KVM, either works), perform the following sequence of commands
Unmount your original filesystem with umount /dev/sdb*. Note that the rescue system is mounted from /dev/sda. Don't touch /dev/sda.
Destroy your original filesystem and the partition it lives on with fdisk. fdisk -u ...
1
Even you did not describe any error niether a problem, I can judge it and try to advice.
First of all, there is no reason for dual boot, if you have hypervisor capable CPU/motherboard, while you can run MS-Windows OS in the Virtual Machine (VM). Running Debian Linux as the host OS gives you at least two systems for virtualisation. The Linux native KVM-Qemu ...
1
I would try to redo the GRUB Installation process (if at least grub seems to load, you can skip step 3):
boot from a linux live iso (e.g. debian live iso)
mount your efi system partition:
mount /dev/sda1 /mnt
grub needs devices: mount --bind /dev /mnt/dev
chroot into your debian system: chroot /mnt
reinstall grub entry in firmware boot manager:
grub-...
1
-l | --loader NAME
Specify a loader (defaults to \\elilo.efi)
A kernel with EFI-stub is still not a loader. To boot from BIOS it has to be an EFI-application. All the boot loaders have .EFI suffix. I think it is possible to turn a kernel into such a directly bootable object, but normally it is one of the boot loaders that gets started (with or ...
1
Yes it is possible. Just make sure to install the bootmanager on the external disk, too.
It is a standard installation procedure otherwise.
1
Thanks @Madhubala for the solution.
Linux needs the controller in AHCI mode. So i've set it up from RAID to AHCI, then the CentOS installer detected the Hard Drive and I installed the OS. I expected, i won't be able to boot into Windows. To my Surprise, i'm able to boot into both OS. Dual Boot works as well.
1
Broken/flaky USB stick?
(I've got some that work fine on some machines, and aren't even acknowledged by others. Never bothered to find out why.)
1
I'd solve it in the good old-fashioned way.
newfs /dev/ada1s1
mount /dev/ada1s1 /mnt
cd /mnt
dump -0a -f - /dev/ada0s1 | restore -rf -
gpart bootcode -b /boot/mbr -p /boot/boot1 ada1
This makes a fresh filesystem, mounts it and enters the destination directory because restore needs to work there. It copies the entire file system with the classic backup ...
1
First you need a backup copy in case something went wrong.
You need tools for filesystem you use, whatever it is.
First you need a program which will logically shrink your partition in filesystem you use.
I did such thing few times before with ntfs and ext3 but idea is the same for every filesystem.
I assume that your image is image of partition (sda1.img),...
1
As I run some tests thanks to the comments I figured out, that the problem is the fstab entry. If I comment out the fstab entry the system will boot without VGA installed. I find it quite strange, as it works when the VGA is installed.
After all I may mixed up FakeRAID and SoftwareRAID, but I'm not sure. I disabled RAID in BIOS, set my HDDs to AHCI and ...
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