IT320 OPERATING SYSTEM CONCEPTS Unit 3: Welcome to Linux June 2011 Kaplan University 1

Unit 3: Reading & Assignments  Textbook Reading  Chapter 2 (section on Linux)  2 Discussion Questions  PowerPoint Presentation  Due Tuesday, June 7, 2011 Kaplan University 2

Unit 3: Discussion Questions  DQ1  Linux distributions include many applications you would normally pay for on a Windows operating system. Select two applications that are included with Linux and compare them to applications you paid for to use on Windows. Share with the class your experience using the applications, is the functionality comparable, is it easy to use, would you recommend the application to others?  DQ2  Now that you have been introduced to Linux, what differences and similarities have you found in Linux and Windows? Be as detailed as possible. Kaplan University 3

Unit 3: Linux PowerPoint  Create a presentation of at least 10 PowerPoint slides comparing three Linux distributions.  Your presentation should include, but not be limited to, the hardware requirements, features, applications and utilities included with your Linux distribution.  Select one Linux distribution you would recommend for home use. Be sure to defend your selection.  Also include a title slide and reference slide (not part of 10)  If you need any guidance using PowerPoint, you can refer to the Atomic Learning section in the course home unit. Kaplan University 4

Unit 3: Grading Rubric Kaplan University 5

Overview of Linux 6 Kaplan University

What is Linux?  “Linux is a free Unix-type operating system originally created by Linus Torvalds with the assistance of developers around the world. Developed under the GNU General Public License, the source code for Linux is freely available to everyone.”  Source: Kaplan University 7

Who created Linux?  Started in 1991 as a variant of UNIX  Created by Linus Torvalds at University of Helsinki, Finland  Version 1.0 of the Linux Kernel released in 1994  Current version of Linux Kernel is Version 2.6 Kaplan University 8

Linux - GPL  Torvalds released Linux under GPL  GNU general public license (GPL)  Very different from standard commercial software license  Author agrees to give away source code  Anyone is licensed to redistribute it in any form What is advantage of releasing under GPL? Kaplan University 9

Why Linux?  OS is free – you supply the hardware  Fully customizable  Powerful & exploit features of hardware  Linux Kernel is small & compact  Highly compatible with other OS  Well Supported  Open Source Kaplan University 10

Linux Kernel  Kernel = Operating System  Interacts with hardware system  Provides execution environment to applications  To learn more about Linux Kernel, try the O’Reilly book “Understanding the Linux Kernel”Linux Kernel  If you want to create your own, try the wiki site Kaplan University 11

Linux Kernel  Kernel is process manager not process  2 modes  User mode In user mode, applications can not access the kernel.  Kernel mode  Kernel switches between modes Kaplan University 12

Strengths of Linux  Stability  Security  Speed  Cost  Multiprocessing  Applications Kaplan University 13

Linux Distributions  Linux Kernel doesn’t provide all features of OS  Complete OS should include:  Hardware devices  Installation programs  Networking and system admin utilities  Personal productivity applications  Documentation  Linux Distributions  Version of Linux with OS Kernel and these components Kaplan University 14

Linux Distributions

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Linux Distributions (“Flavors”)  Ubuntu  Fedora  openSUSE  Debian  Mandriva  FreeBSD  Linux Mint  PCLinuxOS  Slackware  Gentoo  CentOS  Plus hundreds more 17 Kaplan University

The Complete Guide to Linux System Administration 18 Hardware Requirements  Can run on very minimal hardware  Recommend that computer have minimum of:  1 GB of free disk space  64 MB of RAM  For Red Hat Enterprise Linux installations:  256 MB of RAM  300 MHZ CPU  800 MB of free disk space

The Complete Guide to Linux System Administration 19 Version Numbering  Version numbers assigned to:  Each release of Linux kernel  Each component of Linux distribution  Linux distributions  Most users select latest available version

The Complete Guide to Linux System Administration 20 Version Numbering (continued)  Kernel version number components  Major version number  Minor version number Even indicates production release Odd indicates development release  Patch-level number

The Complete Guide to Linux System Administration 21 Linux Certification  Industry certification programs  Red Hat Certified Technician  Red Hat Certified Engineer  LPI Certification  Linux Certified Administrator (LCA) Certification  Linux+ Certification  Novell Certified Linux Engineer

The Complete Guide to Linux System Administration 22 System Administrator  Linux is increasingly part of information technology infrastructure of large organizations  Knowledge of Linux can set you on path to a fulfilling and profitable career

The Complete Guide to Linux System Administration 23 Careers in Linux  System administrator  Network administrator  Software engineer  Trainer  Technical writer  Product marketing  Business consultant

Unit 3 Assignment 24 Kaplan University

Unit 3: Linux PowerPoint  Create a presentation of at least 10 PowerPoint slides comparing three Linux distributions.  Your presentation should include, but not be limited to, the hardware requirements, features, applications and utilities included with your Linux distribution.  Select one Linux distribution you would recommend for home use. Be sure to defend your selection.  Also include a title slide and reference slide (not part of 10)  If you need any guidance using PowerPoint, you can refer to the Atomic Learning section in the course home unit. Kaplan University 25

PowerPoint Assignment (slides)  Title  Overview / Preview of Presentation  What is Linux?  2-3 slides for Distribution 1  2-3 slides for Distribution 2  2-3 slides for Distribution 3  Recommended Distribution for home use & why  References Kaplan University 26

Example – centOS Linux  centOS Linux  Started in 2003  Based on Red Hat Enterprise Linux (RSEL)  Same as RSEL with centOS logo & branding  Stands for “Community Enterprise OS”  Reliable server distribution  Updates released about every 2-3 years  Stable for enterprises, but not “latest & greatest” Kaplan University 27

Example – centOS Linux  Hardware  “Installation DVDs and installable live CDs (with GNOME) for i386 and x86_64 processors; older versions (3.x and 4.x) also available for Alpha, IA64 and IBM z-series (s390, s390x) processors.”  Add my own comments here  Source: Kaplan University 28

Example – centOS Linux  Features  Stable & Secure  Includes OpenOffice 2.0  No DVD software interface  What else??  Utilities  Updated by YUM (Yellowdog Updated Modifier)  GNOME & KDE GUI Interfaces  RPM (RedHat Package Manager) Kaplan University 29 Source: post html post html

Any Questions?  Pam Van Hook  Kaplan University 30