Unix seminar
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This seminar presentation provides an overview of UNIX, including its history, structure, commands, file structure, applications, and advantages/disadvantages. Specifically, it discusses how UNIX was developed in the 1960s and is now widely used. It describes UNIX's multi-user and multitasking capabilities, hierarchical file structure, and shell interface. Finally, it notes applications of UNIX across industries and its advantages like access control and portability, as well as potential disadvantages like software incompatibility.
Unix seminar
- 1. Seminar Presentation By:- Ajeet Kumar Kushwaha Computer & Science Engg. Roll No:-107191004
- 3. Contents.. What is UNIX History of UNIX Why use UNIX UNIX Structure Commands File Structure Applications of UNIX Advantages and Disadvantages of UNIX
- 4. What is UNIX:- UNIX once referred to a specific operating system. It is available in variety of “flavors” like as BSD, sun OS, Solaris, etc. UNIX operating system is a large program(mostly coded in C) that turns the computer into a usable machine. It provides a number of facilities: Management of hardware resources Directory and file system Loading/ execution/ suspention of programs
- 5. Cont… UNIX is not a single operating system. It is a family of operating system. It is a multitasking, multi-user computer operating system.
- 6. History of Unix:- UNIX was first developed in 1969 by a group of AT&T Bell labs, including Ken thompson, Dennis Ritchie. It was first developed in assembly language, and in 1973 it was recoded in C. In 1990 LINUX was developed which is a flavor of UNIX. Now UNIX is wide spread and available from many sources.
- 7. Why use UNIX:- Multi-user operating system Multitasking operating system Time sharing operating system Portability Network capability Easy to program I/O independence Communicating among users
- 8. Unix Structure:- The operating System User programs Kernel Hardware Shell
- 9. User programs:- The UNIX System contains several hundred utilities or user programs. Commands are also known as tools, because they can be used separately or put together in various ways to carry out useful tasks. Kernel:-The kernel is the part of the operating system that interacts directly with the hardware of a computer, through device drivers that are built into the kernel. It provides sets of services that can be used by programs
- 10. Cont.. Shell:-The shell reads your commands and interprets them as requests to execute a program , which it then arranges to have carried out. Because the shell plays this role, it is called a command interpreter.
- 11. Command Use passwd Change your password date Get the current date and time cal Display a calendar who List all users who are currently logged in finger username Get information about username write username Send a chat message to username talk username Open a chat session with username mesg y mesg n Accept or block incoming messages man command Get information about command mailx mailx address Read e-mail messages, or send an e-mail to address exit Log out of the system shutdown poweroff Turn off the machine COMMANDS:-
- 12. File structure:- the UNIX file system is called a hierarchical file system. Within the UNIX System, there is no limit to the number of files and directories you can create in a directory that you own. File systems of this type are often called tree-structured file systems,
- 13. Extension File Type Extension File Type .au Audio .mpg, .mpeg MPEG video .c C language source code .o Object file (compiled and assembled code) .cc C++ source code .pl Perl script .class Compiled Java file .ps PostScript file .conf Configuration file .py Python script .d Directory .sh Bourne shell script .gif GIF image .tar tar archive .gz Compressed with gzip .tar.Z, .tar.gz Files that have been archived with tar and then compressed .h Header file for a C program .tex Text formatted with Tex/LaTeX .html Webpage .txt ASCII text .jar Java archive .uu, .uue Uuencoded file .java Java source code .wav Wave audio .jpg, .jpeg JPEG image .z Compressed with pack .log Log file .Z Compressed with compress
- 14. Application Of Unix:- Applications built using UNIX commands, tools, and programs horizontal applications like as government, industry, and education Others are industry-specific and are known as vertical applications web browsers and web server application Another important class of applications deals with multimedia. Such applications let users create and view multimedia files, including audio, images, and video.
- 15. Advantages of UNIX:- Unix is multitasking and multi-user operating system. Access control and security. A powerfully unified file system. Optimized for program development. Available on wide variety of machines.
- 16. Disadvantages:- Software incompatibility incompatible disk formats.