Linux loses Grub.conf file to start server

Perhaps the user will misuse the grub.conf file and it will not be able to enter Linux operating system
. [Text]

1. The missing or damaged grub.conf file will display the following image:
   
   

   
   

   At this point, you only need three simple steps. Enter the operating system
   
   
   
   1. Root to start the hard disk:
      
      

      Enter “root (hd0,”, press TAB to display how many Partition. Then enter the full path <;root (hd0,0)”
      
      

   2. Enter the location of the kernel
      
      

      Enter“kernel /vm”Press the TAB key Can automatically complete the kernel's full name, what system can know the full name of the kernel without starting? Because the previous command has told the kernel to be in the first partition of the first disk. Then continue to input ro is read-only The meaning of root=LABEL=/is to tell the system where the root partition is. LABEL is the expression of the alias. (Some Linux systems do not set an alias for the root partition during installation. You can enter e2label /dev/in the operating system. Sda1 view alias)
      
      

   3. Startup item initrd
      
      

      Initrd will read img into memory img systematic device driver initialization program and the like.
      
      

   4. enter the boot to boot