Chapter 1 introduction to linux
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Chapter 1: Introduction to Linux. Introduction. Computer Components: Hardware Software Types of hardware and software Important components of an OS are: User Interface Device drivers What is the function of an OS?. The Place of OS. An OS provides an interface to the H/W. OS (cont.).

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Chapter 1: Introduction to Linux

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Chapter 1 introduction to linux

Chapter 1: Introduction to Linux


Introduction

Introduction

  • Computer Components:

    • Hardware

    • Software

  • Types of hardware and software

  • Important components of an OS are:

    • User Interface

    • Device drivers

  • What is the function of an OS?


Chapter 1 introduction to linux

The Place of OS

  • An OS provides an interface to the H/W


Chapter 1 introduction to linux

OS (cont.)

  • OS also provides GUI and system services such as Network access and Print & File services.


Chapter 1 introduction to linux

The Linux OS

  • Still, what is the main function?

    Managing resources

  • Resources include (processors, MM, I/O, users, etc.)

  • Some operating systems are multitasking multiuser ones!

  • What is Linux? How do you pronounce it?

  • Almost all Linux versions have a common core component called the Kernel


Chapter 1 introduction to linux

The Linux OS (cont.)

  • It is a Unix-like operating system written in C by Linus Torvalds in 1991.

  • It was a trial to improve MINIX (a reduced version of Unix developed by Tanenbaum)

  • Linux was distributed as OSS (Open Source Software), you can modify the code (if you are willing to do so!!)

  • Advantages of OSS: Rapid development, Rapid bug fix, evolving features, etc.)


Chapter 1 introduction to linux

Linux Versions

  • Major, minor, & revision numbers

  • Minor (odd development & even production)


Chapter 1 introduction to linux

Types of S/W licenses

  • GPL: Source code must be freely available

  • Artistic license: OSS that allow source code to be changed only at author discretion


Chapter 1 introduction to linux

Linux Advantages

  • Risk Reduction

  • Meeting Business Needs

  • Stability and Security

  • Available for Different Hardware Platforms

  • Ease of Customization

  • Ease of Obtaining Support (FAQ, HOWTO, LUG, etc.)

  • Cost Reduction


Chapter 1 introduction to linux

More History

  • Unix is the first multitasking, multiuser OS

  • What happened to Unix?

  • Current versions (Solaris, HP-UX, IBM’s AIX, etc.)


Chapter 1 introduction to linux

More on Linux

  • Famous distributions (Red Hat, SuSE, etc.)

  • GUI Components

    • X-Windows

    • Window manager

    • Desktop environment (KDE & GNOME)

  • Common uses:

    • Servers

    • Workstations (Scientific/Engineering and office applications)


Chapter 1 introduction to linux

More on Linux (cont.)

  • Linux also support multitude of servers:

    • Web server (CGI)

    • Mail server

    • Router

    • FTP

    • Firewall and proxy servers

    • News server (Forums)

    • DNS server (FQDN)

    • File and Print servers (light-weight)

    • Application server with DBMS and supercomputers (clustering)


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