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2. introduction to linux

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  • 1. Introduction To Linux By Mohd Yasin Abd Karim yasin@yasin.my
  • 2. What is Linux• Free operating system – open source• Created by Linus Torvalds (1991)• Started Linux by writing a kernel• Released to community of ‘hackers’• Thousands of software developer contribute• Now System Software & application bundled with Linux Distribution
  • 3. What Is an Operating System• OS is made up software instructions that lie between the computer hardware (disk,memory,port,etc) and the aplication programs ( word processors, Web broswer, spreadsheet, etc)• At center is kernel, which provided the most basic computing functions ( managing system memory, sharing procesor, opening and closing devices, etc).
  • 4. Associated with kernel• File systems – structure information• Device Drivers –interfaces to each of the hardware devices• User Interfaces – user interfaces, both graphical and interfaces• System Services – processes that mount file system, network, printer, databases, etc
  • 5. Common Linux Features• Multi-user – many user accounts – Multiple users logged in & working• Multitasking – Many programs running – Background process are referred to as daemons.• Hardware support – Floppy, CD-ROMS – Need a driver
  • 6. Common Linux Features (cont..ed)• Networking Connectivity – LAN card, modems, serial devices• Network Server – Networking services – File server, FTP, mail server, web server, DHCP.• Graphical User Interface ( X window System) – X-based Desktop environment – GNOME – KDE
  • 7. Primary Advantages of Linux• Linux best assets are price, reliability and freedom• Scalability is on of its greatest assets.• Built-in Security features• Capability of using inexpensive hardware• A lot of open sources application• Help always available on the internet
  • 8. Training and Certification• If you are looking for a career in Linux• Get Red Hat certified for working with Centos• Red Hat Certified Technician (RHTC)• Red Hat certified Engineer (RHCE)• Red hat Certified Security Specialist ( RHCSS)• Red Hat Certified Architect ( RHCA )
  • 9. Selecting Linux• 400+ Linux distribution available• Only a few have much market share – Red Hat – Suse – Mandriva – Slackware – Non-commercial • Debian, OpenSuse, Fedora Core, CentOS
  • 10. Mainframe market share• Suse• Red Hat• Non-commercial – Debian/390 – Slack/390 – CentOS ( ‘work alike’ of Red Hat RHEL ) – Fedora Core
  • 11. Realistically speaking• For production use, with commercial support, and ISV certification need – Suse Linux Enterprise Server/Desktop – Red Hat Enterprise Linux• For Proof of Concept work, the choices are far more open
  • 12. What are you looking for?• Is commercial support important to you?• Bleeding edge, or system stability?• Application availability• ISV certifications• Hardware support• Management tools• Support contract terms
  • 13. Bleeding Edge vs Stability• Bleeding Edge ( to a certain extent) – OpenSUSE, Fedora Core – Debian ( testing and unstable)• Stable – Suse Linux Enterprise Server/Desktop – Red Hat Enterprise Linux, CentOS – Slacware, Slack/390 – Debian, Debian/390 ( stable and testing)
  • 14. Support Contract Terms• Red Hat sells three versions• WS, ES and AS• Support is bundled with every license purchased• Your support comes from the seller – Red hat – HP, IBM, DELL, Sun
  • 15. Support Contract Terms• SUSE sells two versions – Enterprise Server – Enterprise Desktop• Built from a common source code base, what gets shipped is different• You can buy support from anyone, including Novell
  • 16. Pricing• Keep in mind SUSE doesn’t bundle support – If you don’t, SUSE will always look less expensive• If you need a lot of support, Red Hat may be less expensive• If you don’t need a lot of support SUSE may be less expensive
  • 17. Try before you buy• Try several Linux dictributions and see which one(s) best meet(s) your needs• Nothing anyone says is as valuable as testing in your own environment
  • 18. Talks to others• Ask other people what they like and dislike about the various distribution – Mailing list• Check out how maintenance/support is delivered, and what people think about both – Timeliness, effectiveness, and cost are important factors.
  • 19. Additional Information• DistroWatch http://distrowatch.com/• SUSE Linux http://www.novell.com/linux/• Red Hat Linux http://www.redhat.com/• Mandriva Linux http://www.mandriva.com/• Debian GNU/Linux http://www.debian.org/• Slackware Linux http://www.slackware.com/• Slack/390 Linux http://www.slack390.org/• CentOS Linux http://www.centos.org/• Sine Nomine Linux Support http://sinenomine.net/support/linux/debian http://sinenomine.net/node/484• HP Debian Support http://h20219.www2.hp.com/services/cache/76815-0-0-225- 121.html
  • 20. Mailing lists and forums• CentOS http://www.centos.org/modules/tinycontent/index.php?id=16• Debian http://www.debian.org/MailingLists/• Fedora Core https://www.redhat.com/mailman/listinfo/fedora-list• Linux-390 http://www2.marist.edu/htbin/wlvindex?linux-390• Mandriva http://www.mandriva.com/en/mailing_lists• Red Hat 3 https://www.redhat.com/mailman/listinfo/taroon-list• Red Hat 4 https://www.redhat.com/mailman/listinfo/nahant-list• SUSE Linux http://en.opensuse.org/Communicate#Mailing_Lists• SUSE SLES http://support.novell.com/forums/2su4.html
  • 21. Evaluation Software• SUSE Linux Enterprise Server http://download.novell.com/index.jsp• SUSE Linux/openSUSE http://en.opensuse.org/Download• Red Hat Enterprise Linux https://www.redhat.com/rhel/details/eval/• Fedora Core http://fedora.redhat.com/download/• CentOS http://www.centos.org/modules/tinycontent/index.php?id=15• Slackware http://www.slackware.com/getslack/• Slack/390 http://www.slack390.org/getslack390.html• Debian http://www.debian.org/CD/• Mandriva http://www.mandriva.com/en/downloads/mirrors/2006
  • 22. Thank You• http://www.yasin.my