2. introduction to linux

2. introduction to linux

• 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 anOperating 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).
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  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
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  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
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  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
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  Primary Advantages ofLinux • 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
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  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
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  Mainframe market share •Suse • Red Hat • Non-commercial – Debian/390 – Slack/390 – CentOS ( ‘work alike’ of Red Hat RHEL ) – Fedora Core
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  Realistically speaking • Forproduction 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
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  What are youlooking for? • Is commercial support important to you? • Bleeding edge, or system stability? • Application availability • ISV certifications • Hardware support • Management tools • Support contract terms
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  Bleeding Edge vsStability • 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)
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  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
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  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
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  Pricing • Keep inmind 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
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  Try before youbuy • 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
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  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.
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  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
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  Mailing lists andforums • 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
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  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