Fix Broken initrd.img in linux

error : file /boot/initrd.img-3.10.12-generic' not found

if error found during booting system
follow the steps below

1.Boot your machine with a Live Media

2. open terminal and get partition 

fdisk -l

3. mount Filesystem
sudo mount /dev/sda1 /mnt
 
sudo mount --bind /proc /mnt/proc
sudo mount --bind /dev /mnt/dev
sudo mount --bind /sys /mnt/sys

4.Chroot /mnt and creating a Backup of the initrd image

sudo chroot /mnt

ls /boot/initrd*

or ls /lib/modules

mv /boot/initrd.img-3.11.0.12-generic /boot/old-initrd.img-3.11.0.12-generic-old

5. Building initrd.img

mkinitrd /boot/initrd.img-3.11.0.12-generic 3.11.0.12-generic-old

update-initramfs -c -k 3.11.0.12-generic

 

6. Finalizing Grub loader and unmounting

grub2-mkconfig -o /boot/grub2/grub.cfg

update-grub

 sudo unmount /mnt/proc

sudo unmount /mnt/sys

sudo unmount /mnt/dev

sudo unmount /mnt

init 6