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Published byHilary Wilson Modified over 9 years ago
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Chapter 1: Introduction to Linux
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2 Introduction Computer Components: –Hardware –Software Types of hardware and software Important components of an OS are: –User Interface –Device drivers What is the function of an OS?
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3 The Place of OS An OS provides an interface to the H/W
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4 OS (cont.) OS also provides GUI and system services such as Network access and Print & File services.
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5 The Linux OS Still, what is the main function? Managing resources Resources include (processors, MM, I/O, users, etc.) Some operating systems are multitasking multiuser ones! What is Linux? How do you pronounce it? Almost all Linux versions have a common core component called the Kernel
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6 The Linux OS (cont.) It is a Unix-like operating system written in C by Linus Torvalds in 1991. It was a trial to improve MINIX (a reduced version of Unix developed by Tanenbaum) Linux was distributed as OSS (Open Source Software), you can modify the code (if you are willing to do so!!) Advantages of OSS: Rapid development, Rapid bug fix, evolving features, etc.)
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7 Linux Versions Major, minor, & revision numbers Minor (odd development & even production)
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8 Types of S/W licenses GPL: Source code must be freely available Artistic license: OSS that allow source code to be changed only at author discretion
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9 Linux Advantages Risk Reduction Meeting Business Needs Stability and Security Available for Different Hardware Platforms Ease of Customization Ease of Obtaining Support (FAQ, HOWTO, LUG, etc.) Cost Reduction
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10 More History Unix is the first multitasking, multiuser OS What happened to Unix? Current versions (Solaris, HP-UX, IBM’s AIX, etc.)
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11 More on Linux Famous distributions (Red Hat, SuSE, etc.) GUI Components –X-Windows –Window manager –Desktop environment (KDE & GNOME) Common uses: –Servers –Workstations (Scientific/Engineering and office applications)
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12 More on Linux (cont.) Linux also support multitude of servers: –Web server (CGI) –Mail server –Router –FTP –Firewall and proxy servers –News server (Forums) –DNS server (FQDN) –File and Print servers (light-weight) –Application server with DBMS and supercomputers (clustering)
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