The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems . It is one of the most prominent examples of free and open source software. Ubuntu is a computer operating system based on the Linux distribution and distributed as free and open source software, using its own desktop environment.

Why upgrade the kernel?

There are several reasons to upgrade the kernel. One is to take advantage of a specific new feature or driver; another is to be protected against a security vulnerability, or just to maintain an up-to-date and healthy system. So, from time to time it may be wise to upgrade your Linux kernel. Even if you choose not to update to every new kernel revision, it is recommended that you at least upgrade from time to time. It is strongly recommended that you immediately upgrade to a new kernel if that new release solves a security problem.