Upgrade the kernel on Debian Jessie

Note: Back up your / my data first.

When there is a booting problem, I could upgrade the kernel to see if it helps:

Type the command:
nano /etc/apt/sources.list

Add this line:
deb http://httpredir.debian.org/debian/ jessie-backports main

Save by typing:
Ctrl+x

Type the command: 
apt-get update
apt-cache search linux-image


See:
linux-image-_version_
linux-headers-_version_


Type:
apt-get install linux-headers-_version_
apt-get install linux-image-_version_

Type:
shutdown -r now

References:

How To Upgrade Kernel
https://wiki.debian.org/HowToUpgradeKernel