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Kernel 4.0 RC3 is out, you can Install, Update and Upgrade to Linux Kernel 4.0 RC3 on Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr (LTS) and Linux Mint

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.

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.

Install/Upgrade to Linux Kernel 4.0 RC3 on Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr (LTS) and Linux Mint :

For Linux System 32 bit (i386) :

$ wget -c http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-headers-4.0.0-040000rc3_4.0.0-040000rc3.201503082035_all.deb \ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-headers-4.0.0-040000rc3-generic_4.0.0-040000rc3.201503082035_i386.deb \ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-image-4.0.0-040000rc3-generic_4.0.0-040000rc3.201503082035_i386.deb

For Linux System 64 bit (AMD64) :

$ wget -c http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-headers-4.0.0-040000rc3_4.0.0-040000rc3.201503082035_all.deb \ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-headers-4.0.0-040000rc3-generic_4.0.0-040000rc3.201503082035_amd64.deb \ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc3-vivid/linux-image-4.0.0-040000rc3-generic_4.0.0-040000rc3.201503082035_amd64.deb

For LowLatency Kernel and ARM you can follow this page for download deb file.

Install Linux Kernel 4.0 RC2 :

sudo dpkg -i *.deb

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

sudo update-grub
sudo reboot

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

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. 

Follow this page for Install Linux Kernel 3.18.9 stable on Linux Mint, Deepin, Elementary OS and Ubuntu Derivative System