Originally Posted by Andrew_Paulus
by it's self and see if it gives you any output. Post that output here.
If that only gives you "unknow command" than I am suspicious that your boot partition is missing.
If indeed your boot partition is missing than you will have to re-install Grub to the Master Boot Record.
ls/boot is for to see what the kernel and intrd files are.
Than you can manually boot with the linux intrd commands.
Once we find where "/boot" is than you can boot with something like (this is just an example)
linux (hd?, gpt?) /boot/<name of kernel> root =dev?
Can you get the output of the command with a Live CD?
It would really help if you can. This way we can see all the partitions on the computer to determine what you have and what is missing.
fdisk -l (small letter L)