Stuck on GRUB command prompt after regular kernel update

[andrejk]

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels, it gave me a GRUB command prompt:

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grub>

What should I do? Thanks in advance for any pointers.

Best, Andrej

PS Maybe it will be useful:

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grub> ls
(hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) (hd1)

[hakerdefo]

Grab a live linux cd or dvd. If your install is 32 bit then you'll need a 32 bit live linux and if your installation is 64 bit then you'll need a 64 bit live cd. Boot the live cd and follow this guide,
How to recover deleted or corrupted Grub2 bootloader
Cheers!!!

[kiyop]

If you can boot live linux, do as hakerdefo suggested.

If you cannot, read the following:

Does the installed debian have separate /boot partition? If so, omit "/boot" in the following.
If the installed debian utilizes RAID, LVM, or encryption, report so and do not try the following.

At grub command line, execute

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ls (hd0,gpt1)/boot/

And find some kernel like vmlinuz-VERSION_OF_KERNEL. If there is not such kernel, replace "1" with "2" or "3".
If you find vmlinuz-VERSION_OF_KERNEL, try

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linux (hd0,gpt1)/boot/vmlinuz-VERSION_OF_KERNEL root=/dev/sda1 ro
initrd (hd0,gpt1)/boot/initrd.img-VERSION_OF_KERNEL
boot

Replace "1" and "VERSION_OF_KERNEL" with proper letters.

If you cannot find any kernel in any partition, report so.