Introduction of Kernel Kernel is core of OS representing core aspect of Linux distribution for computers and servers Architecture of Kernel is monolithic and OS operates in Kernel space. Complete control over anything is there with Kernel Linux Kernel is a layer between hardware of device and software. Kernel is responsible for For application execution, ...
We can distinct boot process in linux in 6 different stages These includes BIOS MBR GRUB Kernel Init Run Level Programs BIOS Acronym for Basic Input Output System BIOS loads and executes MBR boot loader When computer is started, integrity test is carried put by BIOS. It does integrity test of HDD or SSD Then,...
Linux Authorization For security purpose, LINUX divides authorization in Ownership Permission Ownwership In linux, every file and directory is assigned with 3 tyoes of owner User Owner of the file Who creates a file is owner by default Its owner of the file Group Has multiple users All users in a group has same permission...
File Structure and Hierarchy File system is a collection of files in a structure on disk or partition When memory is segmented and it contains data, it is a partion In normal, every partition has file system. To store the data systematically, we need a location. Folowing are reasons why we should have file system...
Variants of Linux There are hundreds of variants of Linux For you, which is best linux? To answer this, it depends on factors like Skills Area of focus Support Required Hardware you are using Softwares you need to use Here are top Linux distributions Ubuntu Most popular distro Announced in 2004 Uses Debian Have app...
Overview of Linux Architecture Hardware Consists all peripheral devices Physical devices E.g RAM, HDD, Processer, motherboard etc Kernel Core Component Directly interacts with hardware Shell Interface to kernel Hides complexity of Kernel’s function Takes command / input from users Executes function of kernels Utilities Provides functionalities of OS to users Utilities programs runs on shells...
Linux Standard Directories All files and directories are under root directory (/) Some standard directories are /root Every file and directory starts from root Root user can write on this directory /root is home directory of root user It is not same as / /bin All executable binary files Files required for booting, repair are...
LINUX WINDOWS Users have access to source code Access of source code is not available to users Highly customizable Less customization option GPL License – free to modify and redistribute Microsoft’s License, can’t be modified and redistribute by users More command lines for daily uses More GUI than command lines Community Support Microsoft Support Users...
UNIX LINUX Source code is not available to public Source code is available to general public Used for servers, workstations and high end computers Used for personal computer, game development etc Expensive Free High end hardware is required No high end hardware is required Uses command line interface Uses command line interface and GUI e.g...
Features and Advantages of Linux Open Source Code easily available Can customize OS Contribute, moify, distribute, enhance Security Less vulnerable Applications needs to be admin authorized No antivirus required Free Free to use No license required GNU GPL License Lightweight Requirement to run linux are low end 128 MB RAM / disk space device can...