2. introduction to linux


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2. introduction to linux

  1. 1. Introduction To Linux By Mohd Yasin Abd Karim yasin@yasin.my
  2. 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. 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. 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. 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. 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. 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. 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. 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. 10. Mainframe market share• Suse• Red Hat• Non-commercial – Debian/390 – Slack/390 – CentOS ( ‘work alike’ of Red Hat RHEL ) – Fedora Core
  11. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 22. Thank You• http://www.yasin.my