1. IT320 Operating System Concepts
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IT320 Operating System Concepts
Unit 3: Welcome to Linux
September 2012

2. Unit 3: Reading & Assignments
Textbook Reading
Chapter 2 (section on Linux)
1 Discussion Question
PowerPoint Presentation
Due Tuesday, September 11
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3. Unit 3: Discussion Questions
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?
Compare the Linux and Windows operating systems. What differences and similarities have you found in Linux and Windows? Be as detailed as possible.
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4. 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.
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5. Unit 3: Grading Rubric Grading Rubric
10 points – Three different Linux distributions selected
10 points – Requirements & features of Linux Distribution 1
10 points – Requirements & features of Linux Distribution 2
10 points – Requirements & features of Linux Distribution 3
10 points – Recommended Linux defended
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6. Overview of Linux
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7. 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:
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8. 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 - Version 3.5.3
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9. 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?
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10. Advantages of Linux?
Based on your readings for this class, name 2 advantages for using Linux.
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11. 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
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12. 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”
If you want to create your own, try the wiki site -
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13. 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
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14. Strengths & Weaknesses of Linux
What are some of the strengths to using Linux as your operating system?
What are weaknesses to using Linux?
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15. Strengths of Linux Stability Security Speed Cost Multiprocessing
Applications
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16. 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
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17. Linux Distributions

18. Linux Distributions
Source:
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19. Linux Distributions (“Flavors”)
Ubuntu
Fedora
openSUSE
Debian
Mandriva
FreeBSD
Linux Mint
PCLinuxOS
Slackware
Gentoo
CentOS
Plus hundreds more
Which distribution(s) of Linux have you worked with?
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20. 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

21. Version Numbering Version numbers assigned to:
Each release of Linux kernel
Each component of Linux distribution
Kernel version number components
Major version number
Minor version number
Patch-level number
Latest stable version for Linux Kernel
Version 3.5.3

22. Careers in Linux
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23. Linux Certification Industry certification programs
Red Hat Certified Technician
Red Hat Certified Engineer
LPI Certification
Linux Certified Administrator (LCA) Certification
CompTia Linux+ Certification
Novell Certified Linux Engineer

24. Linux+ Complete 2 exams (60 questions each)
LX0-101 ($173) Exam covers system architecture; Linux Installation and package management; GNU and Unix commands; devices, Linux file systems, and file system hierarchy standard
LX0-102 ($173) Exam covers shells, scripting & data management; user interfaces & desktops; administrative tasks; essential system services; networking fundamentals; security
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25. 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

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

27. Unit 3 Assignment
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28. 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.
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29. 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
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30. 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”
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31. Example – CentOS Linux Version & Architecture
Current version is CentOS 6.3 for I386 and x86_64 architecture
CentOS currently supports the following architecture
X86 – based on Intel 8086 CPU
X86_64 – 64 bit processor
Ia64 – Intel Itanium architecture (primarily for servers)
Source:
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32. Example – CentOS Linux Features Utilities Stable & Secure
Includes OpenOffice 2.0
No DVD software interface
Utilities
Updated by YUM (Yellowdog Updated Modifier)
GNOME & KDE GUI Interfaces
RPM (RedHat Package Manager)
Source:
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33. Any Questions? Pam Van Hook
Personal
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