Intro to linux


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Intro to linux

  1. 1. An Introduction to Linux Vivek kurmi +91-9008744609 Linux User Group,Manipal Install Fest-2012 16th october,201216-10-2012 Vivek Kurmi LUG Manipal 1
  2. 2. What is Linux? What is Linux?● Linux is Free and Open Source.● It is a UNIX like multi- user,multitasking operating system with the X Windows GUI,which can work on multiple hardware platform.● Since Linux is free and Open Source, there are many flavours to linux. 16-10-2012 Vivek Kurmi LUG Manipal 2
  3. 3. Open Source! Open Source!● Owners of Proprietary Softwares closely guard their Source code, and thus cannot be modified by anyone except them.● On the contrary Open Source softwares means, the source code of the software is OPEN to general public.● Programmers can read,redistribute, and modify the source for a piece of software.People adapt it, improve it and fix bugs.And this can happen at a speed that,compared to conventional software development, seems astonishing. 16-10-2012 Vivek Kurmi LUG Manipal 3
  4. 4. Free Software Free Software● The term Free is in the sense, freedom to copy and re-use the software source, rather than to the price of the software.● To understand the concept, one should- "think of free as in free speech, not as in free beer".● Though Open Source are mostly free of cost there are few exceptions like ZendStudio,houdini. 16-10-2012 Vivek Kurmi LUG Manipal 4
  5. 5. History History ● Linux is Unix-like Operating System. ● The code of UNIX is not copied,only the Operating System Concepts are properly incorporated. ● The development of Linux started from scratch and thus is just a Unix clone and not freely available UNIX copy.16-10-2012 Vivek Kurmi LUG Manipal 5
  6. 6. History-UNIX History-UNIX● In 1970’s AT&t Bell labs funded a project to create a new Operating System and came up with UNIX.● UNIX finally developed as a powerful Operating System and quickly became very famous.● It was first released in 1971 and was initially entirely written in assembly language.Later,in 1973, Unix was re-written in the programming language C by Dennis Ritchie.● Soon after contribution from various Universities AT&T licensed it and made it proprietary making it unfit for teaching and learning. 16-10-2012 Vivek Kurmi LUG Manipal 6
  7. 7. History-GNU History-GNU ● The GNU Project, started in 1983 by Richard Stallman, had the goal of creating a "complete Unix- compatible software system" composed entirely of free software. ● Work began in 1984. By the early 1990s, many of the programs required in an operating system (such as libraries, compilers, text editors, a Unix shell, and a windowing system) were completed, although low-level elements such as device drivers, daemons, and the kernel were stalled and incomplete.16-10-2012 Vivek Kurmi LUG Manipal 7
  8. 8. History-MINIX History-MINIX● MINIX(from "mini-Unix") is a Unix-like computer operating system based on a microkernel architecture created by Andrew S. Tanenbaum for educational purposes.● MINIX was first released in 1987.● MINIX inspired the creation of the Linux kernel. 16-10-2012 Vivek Kurmi LUG Manipal 8
  9. 9. History-LINUX History-LINUX ● In April 1991, Linus Torvalds, a 21-year-old student at the University of Helsinki, Finland started working on some simple ideas for an operating system. ● By September 1991, Linux version 0.01 was released on the FTP server of the Finnish University and Research Network. It had 10,239 lines of code. ● The X Window System was soon ported to Linux. In March 1992, Linux version 0.95 was the first to be capable of running X.16-10-2012 Vivek Kurmi LUG Manipal 9
  10. 10. History-LINUX History-LINUX ● On 14 March 1994, Linux 1.0.0 was released, with 176,250 lines of code. ● Starting in 2004, the release process changed and new kernels started coming out on a regular schedule every 2-3 months. ● As of 2012, the Linux 3.2 release had 14,998,651 lines of code. ● As of January 4, 2011, it would cost approximately 3 billion USD (about 2.2 billion EUR) to redevelop the Linux kernel.16-10-2012 Vivek Kurmi LUG Manipal 10
  11. 11. Why so many Linux flavours?? Why so many Linux flavours??16-10-2012 Vivek Kurmi LUG Manipal 11
  12. 12. Why so many Linux flavours?? Why so many Linux flavours??● All Linux flavours are called Distros which are a fancy term for distributions.● Since its Free and Open Source people are free to modify and release their own version and copies.● If you dont like you one distro you can freely move to any other one which you like for e.g- Open Suse, Mandriva, Slackware etc.● Some popular linux distros are Ubuntu,Kubuntu,Fedora,Mint,OpenSuse, ArchLinux,RedHat. 16-10-2012 Vivek Kurmi LUG Manipal 12
  13. 13. Advantages of Linux Advantages of Linux● Low Cost ● Compatibility● Stability ● Fast and Easy● Performance Installation● Network Friendliness ● Full use of Hard Disk● Flexibility ● Multitasking ● Security 16-10-2012 Vivek Kurmi LUG Manipal 13
  14. 14. Who uses linux?? Who uses linux??● Almost all Hackers rely on linux.● Almost all Supercomputers runs on Linux.● online retailer recently switched entirely to Linux and saved 17 million Dollars.● Google, the most popular search engine on the web, runs on a cluster of over 1000 Linux servers.● Wikipedia runs on linux since its birth and has shifted to Ubuntu since 2008.● NYSE runs on linux.● Life Insurance Corporation of India switched entirely to linux. 16-10-2012 Vivek Kurmi LUG Manipal 14
  15. 15. Linux on multiple hardware platforms Linux on multiple hardware platforms● While not originally designed to be portable,Linux is now one of the most widely ported operating system kernels, running on a diverse range of systems from the ARM architecture to the massive mainframe server.● Some operating systems developed for mobile phones use modified versions of the Linux kernel, including Google Android, HP webOS, and Nokia Maemo. 16-10-2012 Vivek Kurmi LUG Manipal 15
  16. 16. Thank You!!!16-10-2012 Vivek Kurmi LUG Manipal 16