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UNIX 4 U Suchitra Komandur Pradeep Kumar S

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UNIX 4 U Suchitra Komandur Pradeep Kumar S

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    1. UNIX 4 ‘U’ Suchitra Komandur Pradeep Kumar S UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. - Dennis Ritchie

    2. Agenda What is an OS? History of Unix Features of Unix Components of Unix Getting started Unix Commands Important tools and utilities Introduction to the scripting languages

    3. What is an OS? The Operating System (OS) is the interface between User and Hardware. It is the first thing loaded onto the computer. Manages the hardware and software resources of the system. These resources include such things as the processor, memory, disk space, etc. Provides a friendly environment within which applications can do useful work.

    4. OS Features Process Management Storage Management Memory Management Disk Management Application Interface User Interface I/O Management Scheduler

    5. Different types of OS Batch Systems Desktop Systems Real Time Systems Multitasking Systems MultiUser Systems Real-time operating system (RTOS) Single-user, single task Single-user, multi-tasking Multi-userReal-time operating system (RTOS) Single-user, single task Single-user, multi-tasking Multi-user

    6. History of Unix Creators of Unix Dennis Ritchie Ken Thomson Started off with the name Multics – 1965 MultiUser system – 1969 This gave birth to the language ‘C’ Berkeley came up with BSD Unix Unix has been feverishly evolving for over 20 years, sort of like bacteria in a cesspool, only less attractive. - John Levine Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C

    7. Different Flavors of Unix HP-UX Linux BSD Unix Solaris AIX AT & T Unix SVR4 Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C

    8. The Unix Philosophy KISS – Keep It Simple Stupid. Files have places and processes have life. Kernel and Shell. The building block approach. The Featureless File. Portability. Open systems. Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C Bell labs, MIT and GE Christened by Kerningham as Unix Also gave birth to B by Thomson and Ritchie modified it to C

    9. Salient Features MultiUser Multitasking Programming facility System calls and libraries Security GUI Documentation

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