LINUX Hard Disk Partition Overview

LINUX Hard Disk Partition Overview

Hard Disk mostly have a two type of cables IDE and SATA connector cables.
LINUX Hard Disk Partition Overview
Here two type of Partition
  • Primary
  • Extended ( logical )

Draw Backs of LINUX

Three Major Draw Backs of LINUX

Security :- because all code is distributed with the Linux/Unix software, programmers are free to explore how the system works. Free code can find many loopholes and most loopholes are detected before the product is released.
Draw Backs of LINUX

Open Source Software / Hardware (OSS / OSH)

Open Source Software / Hardware
(OSS / OSH) is a computer software/hardware for which the source code and Blueprint of hardware are published. And made available to the public, enabling anyone to copy, modify and redistribute software / hardware without paying royalties or fees.
Open Source Software / Hardware (OSS / OSH)

Feature Of Linux

Feature Of Linux. Some Very Popular Feature Of Linux:
Feature Of Linux
Open Source:- Free software along with the source code and documentation. And users can read the source code and modify it as needed.

Linux SHELL Overview

Shell is the integral part of UNIX/LINUX system. It is responsible for accepting commands from the user, interpreting them and then passing them on to kernel for processing. Shell acts as a user interface.
Linux SHELL Overview

Linux File System Overview

Linux File System Overview:- Linux all information is treated as a file. A single disk can store thousands of files. For organizing data on the disk the operating system provides a file system. Grouping of similar files together in a structure called directory. The file system of LINUX is the main key to success and convenience of LINUX system.
Linux File System Overview
File Type In LINUX
Ordinary Files / Regular Files:- All files created by a user come under this category of files. These Include all data files, program files, object files and executable files. A user can make changes  to such files.
Directory Files:- For each directory there is a file by the same name as the directory which contains information about files under that directory.
Device Files:- Device files are special files typically associated with input-output device, such as printers, tapes, hard-disks, floppy disks etc. The kernel is responsible for mapping the file names to their respective devices.

LINUX FILE HIERARCHY CONCEPTS
LINUX follows the tree-structured or hierarchical directory structure. The LINUX file system is organized as hierarchy that starts with the root directory.
Linux File System Overview pro
The root is represented by a forward slash(/).

/ - This directory is called as the ‘root’ directory. It is at the top of the File system structure. All other directories are placed under it.
root - This is the default home directory of the root user.
/bin - This directory contains executable programs files (binary files). In this directory, one can find the files for the LINUX commands.
/dev - This directory contains the device files. For example the printer may be a file known as prn, the hard disk may be had file.
/etc - This directory contains all the system-wide configuration information as text files.
/lib - This directory contains the library files. Library files contain the reusable functions and routines for the programmer to use.
/tmp - This directory contains all the temporary files, which will eventually be deleted from the system. This is similar to C:\windows\temp\ directory in Windows-based OS.
/mnt - This directory contains where the storage devices other than hard disk are mounted. This directory contains the sub-directories “floppy” and “cdrom”.
/usr - This directory contains the home directories of the users, source text for the online manual (man) pages, games and other directories.
/kernel - This directory contains all the kernel-specific code. Kernel is the heart of the LINUX system. It is responsible for resource-allocation, security and low-level hardware-interfaces.
/home - It contains the home directories of all standard user.
/boot - It contains the kernel and also contains the files related for booting the OS such as boot loader.
/sbin - sbin stands for system binary. It contains essential system commands which can only be used by the superuser.
/var - var stands for variable. It contains variable information such as logs files and print queues.
/media - It is the default mount point for removable storage media such as CDROM/ DVD and Pendrive etc.
/opt - opt stands for optional. It generally contains the third party software’s.

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Linux Principles Overview

Linux Principles Overview
Linux Principles Overview
Everything is a file:- Unix / Linux System treat everything as file including hardware. Unix / Linux security model is based around the security of files.

Introduction Linux

History Of UNIX
Linux OS Operating System Inherit by Unix OS. Unix OS implemented in the 1960s and first released in 1970 under GNU GPL Project. 1 January 1970 Brian Kernighan Found very good software for client & Networking purpose. He gave the name UNIX, that time the first Operating System written in 100% C Language and released in 1973.

What is Active Directory Components

AD is install on a computer this computer called Active Directory Domain Controller ADDC.

Object are categorize

1) Container Objects : container objects can contain other objects and create collection. Example Forest, Tree, Domain and OU.

2) Leaf Objects : Leaf Objects can not contain any other objects. Example User and Computer.

What is Active Directory (AD) ?

Active Directory (AD) Overview
Active Directory AD is a database of Services, Resources, Users and Groups. Active Directory AD is a centralize database of object and provide centralize authentication in Microsoft networks.
What is Active Directory (AD)

What is IP Address Subnetting

What is IP Address Subnetting :- Dividing a single Network into multiple Network. Subnetting is also called as FLSM (Fixed Length Subnet Mask).
What is IP Address Subnetting

IP Address Format And Subnet Mask

IP Address Format And Subnet Mask :- IP Address is divided into Network and Host Portion and Subnet Mask can differentiates Network Portion and Host Portion. Here N is Network and H is Host.

Class A is written as N.H.H.H
Class B is written as N.N.H.H
Class C is written as N.N.N.H