POP OS! Grub

[Ram08]

I have been using PopOS! for more than 6 months. But this problem never came with me .Please help

 

[Lord Boltar]

what you need to do is to reinstall grub.

Boot in to the live Linux USB.
You need to find out if your system uses EFI or BIOS. To do that, open the terminal and use the following command to list your partitions:

sudo fdisk -l

Mount the root partition first. I am using /dev/sda2 for root but you should change this with what you have on your system:

sudo mount /dev/sda2 /mnt

If you have EFI system, mount that partition as well:

sudo mount /dev/sda1 /mnt/boot/efi

Now, the next step is to finally install grub for UEFI system like this:

sudo grub-install --boot-directory=/mnt/boot --bootloader-id=ubuntu  --target=x86_64-efi --efi-directory=/mnt/boot/efi

Restart PopOS using this command:

shutdown -r now

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Installing grub on non-EFI system is even easier.
Mount the root partition of Linux:

sudo mount /dev/sda1 /mnt

And then install grub:

sudo grub-install /dev/sda

Reboot and it should be fine.