Presently, Linux is used by several million users worldwide. The composition of users varies from private users, training centers, universities, research centers, and companies. Below are examples of where Linux is used today. Android phones and tablets – Android phones and tablets use a form of Linux.
A query we ran across in our research was “Which operating systems run on Linux?”.
Well, Tizen OS, which is based on Linux, powers an array of smart home and other smart devices. Many public libraries now host their integrated library systems on Evergreen and Koha. Both of those systems run on Linux. If you are an i. OS user who uses i. Cloud, then you, too, are using a system that runs on Linux.
Also, what is Linux and what can it do?
The majority of web servers run on Linux, and nearly all supercomputers use Linux as their OS. Other devices use the Linux kernel as well, like smart home products, networking gear, and even cars.
Like other operating systems, Linux has a graphical interface, and the same types of software you are accustomed to, such as word processors, photo editors, video editors, and so on. In many cases, a software’s creator may have made a Linux version of the same program you use on other systems.
In short: if you can use a computer or other electronic device, you can use Linux. But Linux also is different from other operating systems in many important ways. First, and perhaps most importantly, Linux is open source software.
Where linux kernel is located?
Since the Linux kernel is a piece of code, it must be stored somewhere on the file-system, such that every time the system reboots, the kernel is loaded in the memory. In Debian/Ubuntu systems, the Linux kernel can be found within the /boot directory. In order to access the Linux kernel, we must know the current Linux kernel version.
The kernel source code installed by the linux-source package is installed in the form of a compressed archive in the /usr/src directory. For example, if you are running Ubuntu 14.04 LTS, the kernel source archive will be at /usr/src/linux-source-3.13.0.tar., and bz2.
What version of Linux kernel do I have?
There no universal standard, but the kernel is usually found in the /boot directory. You can use uname -r to find out the version you’re running and then look for a file in /boot with that name.
What is a page in Linux kernel?
A page is a basic unit of memory, which typically has a size of 4096 bytes. Most of the kernel tasks happen through system calls. For instance, let us perform a system call for retrieving page size in the memory. In the above example getpagesize () is predefined system call.
One thought is that the Linux Kernel is a Memory Manager The Linux kernel manages memory. The allocation and freeing of physical memory is part of the Kernel’s basic job. There is a three-level page table for storing the mapping of addresses. A page is a basic unit of memory, which typically has a size of 4096 bytes.