FREE SOFTWARE
Transcript: Miguel Pascual Álvarez 4ºA E.S.O San Juan de la Cruz INFORMATION AND COMMUNICATION TECHNOLOGY INDEX What is Free Software? Differences between free software, open source software and freeware Advantages of free software Linus Tolvard Linux operating system History Linux distributions Examples Open source programs WHAT IS FREE SOFTWARE? Free software is the software that respects the liberty of the users. In general terms, the users have the capacity to execute, copy, distribute, modificate and improve the software. But, the word "free" in these context doesn´t mean this software is free, it means liberty. Related to that, the creator the the "free software foundation" (FSF) was Richard Stallmann (a programmer) in 1985. He also made the GNU (an operating system). FREE SOFTWARE DIFFERENCEs BETWEEN FREE SOFTWARE, OPEN SOURCE SOFTWARE and freeware There are few differences between free software and open source software: The open source software is more focused in practical benefits than liberty proposed by free software. The open source software uses source code to inspect, modify and improve. * "Source code" is the part of software that most computer users don't ever see; it's the code computer programmers can manipulate to change the software. The open source software isn´t free compared with free software, unless the program allows you to modificate. The freeware is the opposite respect the free software and the open source software: It is free, but in terms of money, it has no liberty. It is close source (hidden source), while the open source software is open source, you can´t modify the software. Some examples are: Google Chrome, Mozilla Firefox or Adobe Reader. DIFFERENCEs BETWEEN FREE SOFTWARE, OPEN SOURCE SOFTWARE and freeware ADVANTAGES OF FREE SOFTWARE + You can run the software with any obstacles. + You can study how the program works, and then you can addapt to your neccesities. + You can improve the program and the users are benefit with yor improvements. LINUS TOLVARDS Linus Benedict Tolvards must known as Linus Tolvards is a software engineer borned in Helsinki (Finland). He is known to start and develop Linus, a free operative system. He created the Linux operating system. LINUx OPERATING SYSTEM In Finland 1991, Linus Torvalds, a student of Computer Science at the University of Helsinki, decided to buy a new PC 386 (33 Mhz, 4MB of RAM, one of the most advanced of its time). Normally, he used it to access the network of his university, but because he didn´t like the operating system with which he worked, Minix, he decided to create one himself. Then, he wanted to download and upload files from his university, but he had to create a controller for the disk. So after a continuous and hard work he created a controller compatible with the Minix system. At that moment, he realized that he was creating something more than a simple terminal emulator (computer), so, dissatisfied with his Minix system, he took the adventure of creating an operating system from 0. Linus named Linux to his new system. Linux is based on UNIX, another operating system. It is also relacionated with the GNU project (to make the GNU operating system) launched by the Free Software Foundation. Linux was developed as a free operating system, proposed by the Free Software Foundation of Richard Stallmann. LINUx OPERATING SYSTEM The logo of the penguin was imposed in 1996, by Tolvard when he visited an aquarium and he saw a lot of penguins. LINUX OPERATING SYSTEM A Linux distribution is a software distribution based on the Linux kernel that includes certain software packages to cover the needs of a specific group of users: domestic, business, server editions users... In general, they are composed of free software. LINUX DISTRIBUTIONS EXAMPLES OF LINUX DISTRIBUTIONS Some examples of linux distributions are: FEDORA: Fedora is a Linux distribution used by the international community of engineers, graphic designers and users who develop new technologies. It has the support and promotion of Red Hat. MANDRIVA: Mandriva Linux was a Linux distribution published by the French company for beginners and experienced users, oriented to personal computers and servers to introduce them in Linux world and free software. UBUNTU: It is created to a normal user, focused on improving the user experience. It is distributed with a free or open source license. EXAMPLES OF LINUX DISTRIBUTIONS DEBIAN: Debian GNU/Linux is a free operating system, developed by thousands of volunteers around the world, who collaborate through Internet. GENTOO: Gentoo Linux is a Linux distribution oriented to users with some experience in these operating systems. SLACKWARE: It is the oldest distribution. EXAMPLES OF OPEN SOURCE PROGRAMS Some examples of open source programs are: Accounting: SQL-Ledger (accounting system) Anti-virus: Clam AV Database MySQL PostgreSQL EXAMPLES OF OPEN SOURCE PROGRAMS