1 Introduction to Open Source Marco Zennaro Carlo Fonda
2 Agenda Open Source Linux Linux history Distributions License Types OS and Development
3 OS Definition Why is it called Open Source Software? Open: collaboration is open to all Source: source code is freely shared
4 Ideals of Open Source What are the ideals of Open Source? Share the goal: a broad group of contributors recognize the same need and agree on how to meet Share the work: projects are broken into smaller tasks, and a review process screens the best contributions Share the result: code should be available to all and improvements should be shared to all
5 Open Source and Science The scientific method rests on a process of discovery and a process of justification For scientific results to be justified, they must be replicable Replication is not possible unless the source is shared
6 Open Source and Science Where scientists talk of discovering, Open Source programmers talk of creating Where scientists talk of replication, Open Source programmers talk of debugging The Open Source movement is an extension of the scientific method
7 Open Source in history The Oxford English Dictionary, 1857 Human Genome Project, one year before Linux
8 Open Source and software Linux, 18 million users Google uses Linux (1000 queries per second!)
9 Open Source and software Apache, OS webserver Used in 69% of webservers, 15 million servers!
10 Open Source and software Open Office, a complete office suite of programs, compatible with Microsoft s Office, available in 21 different languages
11 Open Source and software collaborative software projects registered users!
12 Open Source and software
13 Open Source and software
14 Open Source and software
15 Open Source Projects Biology: cholera
16 Open Source Projects Publishing: Prentice Hall
17 Open Source Projects Publishing: Project Gutenberg books for free Distributed proofreading
18 Open Source Projects Publishing: PLOS PLOS Medicine PLOS Biology
19 Open Source Projects Academia: MIT Open Courseware 915 MIT courses translations in Spanish and Portuguese
20 Open Source Projects Publishing: Wikipedia active contributors articles in 50 languages articles in English
21 Open Source Projects Publishing: Wikipedia
22 Open Source Projects What have we learned so far? Open Source is not new! Open Source is not just software! Open Source is based on sharing!
24 Linux History From the 60s to the 80s, revenues came from selling and supporting hardware. Each computer had its Operating System. In 1969 AT&T laboratories developed Unix, which worked on different hardware platforms. Commercial users had to pay a high license fee, academic ones could use the software with low fees.
25 Linux History Sharing the source code among software developers became commonplace. In the early 80s, AT&T changed the licensing policy, and Unix became restricted to the ones who paid for the license. IBM, HP and DEC developed proprietary Unix versions.
26 Linux History In 1984, Richard Stallman from MIT, started to develop a free alternative to Unix. He also established a special license, the GNU license, to ensure that software is free and open to anyone. In 1985 he founded the Free Software Foundation.
27 Linux History The GNU GPL (General Public License) says that every copy of a program governed by the GPL license, even if modified, must be subject to the GPL again. It has a viral effect! In the 90s, GPL+Internet, many new Open Source projects started.
28 Linux History The GPL guarantees four basic freedoms for the user: You have the freedom to run the program, for any purpose. You have the freedom to study how the program works and modify it to suit your needs. To make this freedom effective in practice, you must have access to the source code.
29 Linux History The GPL guarantees four basic freedoms for the user: You have the freedom to redistribute copies, either gratis or for a fee. You have the freedom to distribute modified versions of the program, so that the community can benefit from your improvements.
30 Linux History In 1991, Linus Torvalds, a finnish computer science student, started to develop a Unix OS for the personal computer. The code of the experimental version was put under the GPL license.
31 From: (Linus Benedict Torvalds) Newsgroups: comp.os.minix Subject: What would you like to see most in minix? Summary: small poll for my new operating system Message-ID: Date: 25 Aug 91 20:57:08 GMT Organization: University of Helsinki Hello everybody out there using minix - I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386(486) AT clones. This has been brewing since april, and is starting to get ready. I'd like any feedback on things people like/dislike in minix, as my OS resembles it somewhat (same physical layout of the file-system (due to practical reasons) among other things). I've currently ported bash(1.08) and gcc(1.40),and things seem to work.this implies that I'll get something practical within a few months, andi'd like to know what features most people would want. Any suggestions are welcome, but I won't promise I'll implement them :-) Linus PS. Yes - it's free of any minix code, and it has a multi-threaded fs. It is NOT portable (uses 386 task switching etc), and it probably never will support anything other than AT-harddisks, as that's all I have :-(. Linux History
32 Linux History In 1997, the Open Source Initiative (OSI) was founded, and it developed the Open Source Definition (OSD). The OSD is a guideline for OSS licenses other than the GPL, and the viral effect is not a requirement.
33 Linux A linux distribution has thousands of dollars worth of software for no cost. Linux is a complete OS that is stable and reliable. Linux is extremely powerful, it comes with a complete development environment and excellent networking facilities.
34 Linux It is an ideal environment to run web servers as Apache. It is easily upgradable. It supports multiple processors as standard. Is has a lot of documentation. It runs also on old machines.
35 Linux Amazon, Yahoo!, CNN, Google run on servers based on Linux. The Human Genome Project was run using Linux clusters.
37 Linux Distributions Linux comes in different flavors MandrakeLinux, for desktops and laptops Slackware, for servers Debian, for experts
38 Linux Distributions Knoppix: it is a live Linux distro, which runs directly from the CD-Rom. Pros: you don t need to install it on your hard disk. It is useful to learn linux, to experiment with it, and to have Linux always with you. Cons: it is slow, you can t save your documents
40 Licenses From UNESCO s World Information Report 97/ 98 : The creation and ownership of knowledge products are of increasing importance because of the centrality of information and knowledge to post-industrial economies.... Those who control copyright have a significant advantage in the emerging, knowledge-based global economy.
41 Licenses The OSI has certified over 40 different open source licensing agreements. The GPL is the most widely-used open source software license and is considered the most purest by requiring that all software code is free and available and that changes must be shared with the community. Linux is available under the GPL license.
42 Licenses The BSD (Berkeley Software Distribution) License, adopted by Berkeley Unix, requires copyright notification, and permits the source to be used in any manner, as long as notification is provided. FreeBSD, Postgres SQL, and Apple s OS X are based on the BSD licensed technology. The MPL (Mozilla Public License) provides for code that can remain proprietary under very specific terms, and is among the most flexible licenses. Mozilla and Firebird browsers are available under this license.
43 Licenses The Creative Commons license is adopted by many writers, musicians, and film-makers. Some Rights Reserved An example is
45 OS and Development
46 OS and Development Linus Torvalds stated in an interview: I think that if the developing country is serious about not just seeing IT as a cost center, but as a requirement for national development, the real advantage of open source ends up being able to build up your own knowledge base. And that is not cheap itself- you ll likely pay as much for that as you d pay for a proprietary software solution.
47 OS and Development Linus Torvalds stated in an interview: The difference being that with the proprietary solution, you ll never catch up, and you ll have to pay forever, without ever learning anything yourself.
48 OS and Development What can you do to promote Open Source software in your country? Establish OSS Advocacy Groups as LUGs (Linux User Groups) Establish an OSS Portal where users can find available open source solutions for specific needs along with the appropriate rating information
49 OS and Development What can you do to promote Open Source software in your country? Establish training programs through professional organizations (doctors, lawyers, etc) Introduce OSS in University curricula Introduce OSS in K-12 curricula
50 OS and Development What can you do to promote Open Source software in your country? Offer localized versions of OSS. This demonstrates the viability of using OSS products for building people-oriented applications, which require national language support.
51 OS and Development
52 OS and Development
53 OS and Development FOSSFA: Free and Open Source Software for Africa
54 OS and Development SchoolNetAfrica
55 Introduction to OS Thank you for your attention! Contact info: Marco Zennaro
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