Grub Rescue unknown filesystem Command Ubuntu error

Today we discuss the most frustrating error which is called Grub Rescue unknown filesystem Command Ubuntu error. We see this error on Ubuntu, Kali Linux, CentOS, Rethat, Blackbox os etc. This is really very hard to resolve and sometimes its better for format and reinstall the OS again. People search on google to solve this error.

Below is Step by step process of Grub Rescue unknown filesystem Command Ubuntu error (100% working)
Step 1: Type ls to find out all the partitions on HDD/SSD
Step 2: check on which partition file system exist
Step 3: set the boot on that partition
Step 4: Set prefix
Step 5: insmod normal
Keywords: Grub Rescue unknown filesystem Command Ubuntu error
Related Articles: Grub Rescue unknown filesystem Command Ubuntu error (100% working)

Below is Step by step process of Grub Rescue unknown filesystem Command Ubuntu error (100% working)

Step 1: Type ls to find out all the partitions on HDD/SSD

#grub> ls

result will be similar as shown below

(hd0), (hd0,msdos1),(hd0,msdos2),(hd0,msdos2),(hd0,msdos3)

Step 2: check on which partition file system exist

#ls (hd0, msdos1)

if it found file system it will show result

ext4: file system

otherwise it will show error

no file system found

check all partition until we find file system

Step 3: set the boot on that partition

grub>set boot=(hd0,msdos1)

grub>set root=(hda0,msdos1)

Step 4: Set prefix

grub> set prefix=(hd0,msdos1)/boot/grub

grub> set prefix=(hd0,msdos2)/boot/grub/

Step 5: insmod normal

grub>insmod normal

grub>normal

if i386-pc file not found on this path

(ls (hd0,msdos2)/boot/grub/

then we have to copy from

(hd0,msdos2)/usr/bin/grub/

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