The Linux kernel mainly acts as a resource manager acting as an abstract layer for the applications. The applications have a connection with the kernel which in turn interacts with the hardware and services the applications. Linux is a multitasking system allowing multiple processes to execute concurrently.
Some think that But, before discussing how any given operating system kernel works, we should first look at what a kernel is responsible for. The kernel provides abstractions for the programmers that develop applications for the kernel’s platform. These abstractions are simplifications for accomplishing complex tasks.
Another frequently asked inquiry is “What is the Linux kernel and why is it important?”.
The kernel is one of the most important parts of the operating system. But it is not the only one necessary to be able to call Linux, today, an operating system as such. As we have explained, this kernel has all the drivers and everything necessary to control the software and allow the user to access it.
An OS is more than the kernel, as it comprises a number of utilities and scripts, including an init (or bootstrap) system. For example, GNU/Linux is an OS and Linux is its kernel; until recently, System V init was the initialization system.
How is Linux kernel development done?
A great deal of Linux kernel development work is done by way of mailing lists. It is hard to be a fully-functioning member of the community without joining at least one list somewhere.
Is linux kernel can be modified?
The license in the case of the Linux kernel is GPL (http://www. gnu. org/copyleft/gpl. html). In a nutshell, you are allowed to modify the code in any way you wish. However, if you distribute your modified code, you have to license it GPL and keep the credit to the original authors.
This of course begs the query “Is it possible to boot a different Linux kernel?”
Besides booting a different kernel for real, one may want to run it under Xen or similar virtual environments –which is yet another relatively new area of that kind. Lets cut to the chase: to modify a function call, get the kernel sources, find it/modify it, recompile, and you are done. THIS will give you a highly non-portable/customized kernel.
So you can change any module compile the kernel and install it and test it. Link to linux source is attached.
What is Linux and how do I use it?
Unlike some operating systems, Linux doesn’t try to hide the important bits from you—it gives you full control of your computer. But to truly master Linux, you need to understand its internals, like how the system boots, how networking works, and what the kernel actually does.
For example, GNU/Linux is an OS and Linux is its kernel; until recently, System V init was the initialization system. In *nix systems, it is normally very hard to even think of a function which has not yet been implemented (consider the “rev” command, for example).