UNIX introduction
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UNIX introduction

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By : Eng.Mohamed Hassan

By : Eng.Mohamed Hassan

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    UNIX introduction UNIX introduction Presentation Transcript

    • UNIX IntroductionUNIX Introduction and history
    • Introduction Your trainer…  Title: Network Engineer  Education: Master Degree in Network Engineering, BSC degree in Computer Engineering  Experience : Mcse,Mcitp,MCIT UNIX/Linux trainer.  Contact: thephilosopher10@gmail.com Mob.01113555023 Mohammed Hassan
    • Introduction ObjectivesBy completing this presentation , you will be able to:  Understand Unix. Its philosophy, different Unix families.  Discover the free world. Different licenses.  Discover Linux. From its history to the application in company.
    • Introduction TopicsPlan:  Unix. Its philosophy and its history.  From Unix to Linux.
    • Introduction Unix History and philosophy
    • UnixPreviewHere’s what we’ll see:  Unix utility.  Unix history.  Different Unix.  Targets of Unix.  Unix philosophy
    • Unix Unix utility Unix have to: Work 24/24, 7/7. Being multi tasks. Being multi users. Make scientists calculation. Being perfectly reliable.
    • Unix Unix History Here’s Unix history 1969 1976 1978 1991Creation by KenThompson andDenis Ritchie from Creation of LinuxBell Labs by Linus Torvalds Split between Creation of BSD and type Apple V Unix
    • Unix History
    • UnixThe different Unix Proprietary Unix Solaris Sun AIX IBM HP-UX HP MacOS X Apple
    • UnixThe different UnixBSD - Berkeley Software Distribution  Licensed  3 major branches :  FreeBDS  NetBSD  OpenBSD  Server/Security oriented
    • UnixThe different Unix ary Un ix are Pr opriet ld for eated and so cr comp uters s pecific (ex ample aris/S PARC) Sol
    • UnixTargets of Unix According to its design, Unix targets are: Scientist University Army States organization
    • UnixUnix philosophyPhilosophy of Unix system  Everything is a file  Hard Drive, CDROM drive, CPU …  Task segmentation  A program must be portable  Write code quickly and to share with the community  Correct bugs quickly
    • UnixUnix philosophyAdvantages and disadvantages of proprietary Unix: Advantages Disadvantages Stability Buy cost High load Resistance Maintenance cost Security Not User Friendly
    • UNIXQuiz The BSD system is a different Unix system MacOSX is not based on the Unix system UNIX system is a multi-task system UNIX system is a multi-user system
    • Introduction From Unix to GNU/Linux History and philosophy
    • From Unix to GNU/LinuxPreviewHere’s what we’ll see:  Open source softwares.  Free softwares  GNU / Linux.  Applications.
    • From Unix to GNU/Linux Open source softwareThere are two types of software  Binary form  Sources unavailable  Not human understandable  Original form (Source) O  Human understandable  Access to the sources.
    • From Unix to GNU/LinuxOpen source softwareConcept of Open Source and Proprietary system Open Sources Software – Offer the possibility for the user to access the source code of the application Proprietary Software – Doesn’t offer the access to the source code
    • From Unix to Linux Free softwareTo be free a software must respect this 4 rules: Free to Free to read the code execute Free to Free to improve redistribute
    • From Unix to Linux GNU / LinuxFSF and GNU  Free Software Foundation  1984 by Richard Stallman  A Free clone of Unix free  free as in “free speech”, not as in “free beer”  GNU-GNU’s not UNIX  GPL-General Public License  A legal frame for the free software  Actual version : 3
    • From Unix to Linux GNU / LinuxThe birth of the Linux Kernel  Created in 1991 by Linus Torvalds  Minix clone  Based on concepts and Unix philosophy  Sources available for free on Internet.  A community appeared on internet  Linux is not an operating system
    • From Unix to Linux GNU / Linux  Very early Richard Stallman convinces Linus Torvalds to put the kernel v 0.12 under GPL license  GNU softwares are then adapted to work with Linux kernel  The Linux kernel and GNU softwares make a true operating system  GNU + Linux Kernel = GNU/ Linux
    • From Unix to Linux DistributionsWhat’s a distribution A distribution contains often:  A Kernel (sometimes modified).  A software library.  An installation program.  A package manager.
    • From Unix to Linux ApplicationsThe most used distributions:
    • From Unix to Linux ApplicationGNU/Linux is used in company for:  Web server  FTP server  DHCP/DNS server  Proxy/Cache server  Firewall  Embeded systems
    • From Unix to Linux ApplicationsAdvantage and disadvantages de Linux : Advantages Disadvantages Stability No After Sale services Reliability Lack of Knowledge Security Not User-friendly
    • From Unix to Linux Quizz The FSF was created by Richard Stallman GNU is Linux Richard Stallman created the Linux kernel There are many Linux distributions on the market
    • From Unix to Linux Stop and Think Do you have any questions ?