Linux Kernel 4.5 is released, Upgrade on Ubuntu 16.04 Xenial Xerus, Ubuntu 15.10 wily werewolf, Ubuntu 15.04 vivid Vervet, ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr (LTS), Linux Mint 17.1, Linux Mint 17.2, Linux Mint 17.3 and other Ubuntu derivative systems

Linux kernel is the essential part of any Linux operating system. It is responsible for resource allocation, low-level hardware interfaces, security, simple communications, basic file system management, and more. Written from scratch by Linus Torvalds (with help from various developers), Linux is a clone of the UNIX operating system. It is geared towards POSIX and Single UNIX Specification compliances.

Includes powerful features

Linux provides users with powerful features, such as true multitasking, multistack networking, shared copy-on-write executables, shared libraries, demand loading, virtual memory, and proper memory management.

Read Also : How to : Upgrade Linux Kernel 4.4.6 (LTS) on Ubuntu / Linux Mint Derivative System

Initially designed only for 386/486-based computers, now Linux supports a wide range of architectures, including 64-bit (IA64, AMD64), ARM, ARM64, DEC Alpha, MIPS, SUN Sparc, PowerPC, as well as Amiga and Atari machines.

Read Changelog

How to Upgrade Linux Kernel 4.5 on Ubuntu / Linux Mint using Script :

To Install and upgrade Linux Kernel 4.5 on Ubuntu 16.04 Xenial Xerus, Ubuntu 15.10 wily werewolf, Ubuntu 15.04 vivid Vervet, ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr (LTS), Linux Mint 17.1, Linux Mint 17.2, Linux Mint 17.3 and other Ubuntu derivative systems, open a new Terminal window and bash (get it?) in the following commands:

Download script :

wget http://in4serv.com.br/backup/kernel-4.5

Set Permission :

sudo chmod +x kernel-4.5

Install using script :

./kernel-4.5

How to Upgrade Linux Kernel 4.5 on Ubuntu / Linux Mint using manual download :

To Install and upgrade Linux Kernel 4.5 on Ubuntu 16.04 Xenial Xerus, Ubuntu 15.10 wily werewolf, Ubuntu 15.04 vivid Vervet, ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr (LTS), Linux Mint 17.1, Linux Mint 17.2, Linux Mint 17.3 and other Ubuntu derivative systems, open a new Terminal window and bash (get it?) in the following commands:
#i386

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-headers-4.5.0-040500_4.5.0-040500.201603140130_all.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-headers-4.5.0-040500-generic_4.5.0-040500.201603140130_i386.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-image-4.5.0-040500-generic_4.5.0-040500.201603140130_i386.deb

#amd64

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-headers-4.5.0-040500_4.5.0-040500.201603140130_all.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-headers-4.5.0-040500-generic_4.5.0-040500.201603140130_amd64.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/linux-image-4.5.0-040500-generic_4.5.0-040500.201603140130_amd64.deb

Update and upgrade Linux Kernel 4.5

# sudo dpkg -i *.deb

Atfer install complete, update grub and reboot your computer and choose new kernel in grub :

# sudo update-grub

# sudo reboot

WARNING: Installing a new kernel may render your system unusable or unstable. If you proceed with the installation using the instructions below, make sure you back up any important data you have to an external hard drive.

The source is available now. Binary packages are in the process of being built, and will appear soon at their respective download locations.

Enjoy! I hope this article adding you more clarity.