Linux small Knowledge Translation-Kernel (kernel)

Last introduced the Linus Torvalds, this time introduced him to develop the "kernel".

Often hear people mention "linux kernel", but if asked what is the "kernel? , it would be surprisingly difficult to answer.

So, what exactly is kernel? "kernel" translation came to mean the "core", in short, the core of "linux program is the Linux kernel".

In fact, strictly speaking, "linux" refers to "linux kernel". (More recently, the "linux release" is a growing number of short-"linux" ")

The explanation of Linux kernel as "the system's core program" doesn't seem to show any point. Specifically, what does kernel do?

Kernel is actually the management of hardware running, and then the specific point is to manage memory, management files, management device drivers, management processes and so on.

For example, kernel corresponds to "mind" that controls the hardware to complete user instructions after receiving instructions from the user.

Although the most important and important part of the OS is the kernel, the kernel OS is not operational. The human body is the same, only the head can not move.

One of the other necessary things is "interface". "Interface" is the work of the intermediary, the equivalent of the nerves in the body.

"User interface" means "connecting the intermediary between the user and the kernel". Through the user interface, the user's instructions can be communicated to the kernel, and then the processing interface of the kernel is fed back to the user.

The so-called Linux distribution, is the Linux kernel, user interface, and other various programs packaged together as the OS so that users can immediately use things.

Beginners are basically using Linux on Linux distributions.

Only the kernel OS is unable to run. Of course, although you can import other applications in the kernel, it is also possible to use it, but it is best to think that "using the kernel alone" is not possible.