I have a dual system window10/Ubuntu16.04 installed in my laptop. Today I can not access window files from Ubuntu and tried one command line from youtube which seems to mess things up :< The system did not boot like before but entering into the grub prompt instead. It seems that system does not know where/what to boot now and may need a manual configuration.
First, I changed the booting priority in bios so that linux will boot first. I have an Asus laptop. To enter into BIOS, hold
F2 when starting your machine.
Find the root system
When in grub prompt, type
ls to check files in the system. You will see things like
ls each one to find where the root system is (you can omit the gpt label). For me, it is
ls (hd0,9)/ outputs things like:
lost+found/ bin/ ... vmlinuz ... initrd.img ...
If you have many linuxes installed, double check if it is the right system by command
Boot the system
Now, it is time let GRUB know the system you want to boot by typing commend:
grub> set root (hd0,9) grub> Linux /vmlinuz root=/dev/sta5 grub> initrd /initrd.img grub> boot
If you do not know where your root device is, you can use
UUIDfor specifying the path. type
cat /etc/fstaband check the output. The
UUIDfor the root device is located in the entry where
\is in the
<mount on>column. Then you can replace
root=UUID=[UUID you found].
If you want to specify the kernel version of your linux, you can check available ones by typing
ls (hd0,9)/boot/. To suppress the output, you can do
set pager=1. Now you can boot the system you want by
grub> set root (hd0,9) grub> Linux /boot/vmlinuz-[version] root=/dev/sta5 grub> initrd /boot/initrd.img-[version] grub> boot
The version has to be the same in the second and thrid command line or you will get a kernel panic.
Hurrah, the system now boots correctly. To fix it permantly, after you boot succesfully. Type these in the shell:
$ update-grub $ grub-install /dev/sda
Hopefully, I did not mess up with linux again…