(N4) Operating System -part1 - OS Types,OS Arch, Desktop OS , Server OS
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What is an Operating System?
An Operating system (OS) is a software which acts as an interface between the end user and computer hardware.
Every computer must have at least one OS to run other programs.
An application like Chrome, MS Word, Games, etc needs some environment in which it will run and perform its task.
The OS helps you to communicate with the computer without knowing how to speak the computer's language.
It is not possible for the user to use any computer or mobile device without having an operating system.
OS Architecture
Kernel
-interacts with Hardware
-Kernel Manages:
-Hardware management
-Disk Management
-Process management
-Network management
-Memory Management
Shell
-Interacts with user
-provide user interface
-runs applications
Linux/Unix:
-*Bourne Again Shell – BASH
-Bourne Shell – Sh
-tsh
-csh
-ksh
User Interface:
CLI – Command Line Interface
GUI – Graphical User Interface
TUI – Text Based or Terminal Based User Interface
SOS – Simple Operating System:
Desktop OS: MS DOS, Windows XP, 7 , 10,Ubuntu Desktop, Linux Mint
NOS – Network Operating System:
Server OS: Windows Server 2019,2016, Linux , Unix …
User and Task – Type of OSs
•SUST: Single user Single Task: MS DOS
•SUMT: Single User Multi Task: Windows XP,7, 10..Win server 2019..
•MUMT: Multi User Multi Task: Unix/Linux
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•Real-time operating system – Any thing that is Automated (RLINIX)
•Mobile Operating System – Android ,IOS, Symbian, Tizen, Black Berry , Windows Phone
Desktop OS: Application, Games, Data processing, Multi media, web browsing, programming, Playing –Audio, Video, it’s a Client PC or End user Device
Server OS: Support Server Applications, Built in Server features
Type of Server:
•DHCP SERVER
•DNS SERVER
•VPN SERVER
•WEB SERVER – Application Server(Middleware Server)
•FILE SERVER
•Mail Server
•Authentication Server – ADDS
•Proxy Server
•Remote Desktop Server
•Deployment Server
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