In the Beginning


Linux was created a little over a decade ago, in 1991. A decade is considered a lifetime in the world of computing, but Linux actually harks back even further, into the early days of modern computing in the mid-1970s.

Linux was created by a Finnish chap named Linus Torvalds. At the time, he was studying in Helsinki and had bought a desktop PC. His new computer needed an operating system. Torvalds's operating system choices were limited: there were various versions of DOS and something called Minix. It was the latter that Torvalds decided to use.

Minix was a freely available clone of the popular Unix operating system. Unix was used on huge computers in businesses and universities, including those at Torvalds's university. Unix was created in the early 1970s and has evolved since then to become what many considered the cutting edge of computing. Unix brought to fruition a large number of computing concepts in use today and, many agree, got almost everything just right in terms of features and usability.

Versions of Unix were available for smaller computers like Torvalds's PC, but they were considered professional tools and were very expensive. This was in the early days of the home computer craze, and the only people who used IBM PCs were business people and hobbyists.

Note 

Linux is a pretty faithful clone of Unix. If you were to travel back in time 20 or 30 years, you would find that using Unix on those old mainframe computers, complete with their teletype interfaces, would be similar to using Linux on your home PC. Many of the fundamental concepts of Linux, such as the file system hierarchy and user permissions, are taken directly from Unix.

Torvalds liked Unix because of its power, and he liked Minix because it was free and ran on his computer. Minix was created by Andrew Tanenbaum, a professor of computing, to demonstrate the principles of operating system design to his students. Because Minix was also a learning tool, people could also view the source code of the program—the original listings that Tanenbaum had entered to create the software.

Minix was lacking in some significant areas. Many people, including Torvalds, found using it very frustrating. Torvalds decided to create from scratch his own version of Minix, but to make it better, avoiding what many considered the pitfalls of Minix. He managed to produce version 0.01 of Linux in just over half a year.

Note 

Most clones or implementations of Unix are named so that they end in an x. One story has it that Torvalds wanted to call his creation Freax, but a containing directory was accidentally renamed Linux on an Internet server. The name stuck.

From day one, Torvalds intended his creation to be shared among everyone who wanted to use it. He encouraged people to copy it and give it to friends. He didn't charge any money for it, and he also made the source code freely available. The idea was that people could take the code and improve it.

This was a master stroke. Many people contacted Torvalds, offering to help out. Because they could see the program code, they realized he was onto a good thing. Soon, Torvalds wasn't the only person developing Linux. He became the leader of a team that used the fledgling Internet to communicate and share improvements.

Note 

The popular conception of Linux is that it is created by a few hobbyists who work on it in their spare time. This might have been true in the very early days. Nowadays, in addition to these "bedroom programmers," Linux is programmed by hundreds of professionals around the world, many of whom are employed specifically for the task. Torvalds adds to the effort himself and also coordinates the work.

It's important to note that when we talk here about Linux, we're actually talking about the kernel—the central program that runs the PC hardware and keeps the computer ticking. This is all that Torvalds initially produced back in 1991. It was an impressive achievement, but needed a lot of extra add-on programs to take care of even the most basic tasks. Torvalds's kernel needed additional software so that users could enter data, for example. It needed a way for users to be able to enter commands so they could manipulate files, such as deleting or copying them. And that's before you even consider more complicated stuff like displaying graphics on the screen or printing documents.

Linux itself didn't offer these functions. It simply ran the computer's hardware. Once it booted up, it expected to find other programs. If they weren't present, then all you saw was a blank screen.

image from book
Linus Torvalds

Linus Benedict Torvalds was born in Helsinki, Finland, in 1969. A member of the minority Swedish-speaking population, he attended the University of Helsinki from 1988 to 1996, graduating with a Masters degree in Computer Science.

He started Linux, not through a desire to give the world a first-class operating system, but with other goals in mind. Its inspiration is in part due to Helsinki winters being so cold. Rather than leave his warm flat and trudge through the snow to the university's campus in order to use its powerful minicomputer, he wanted to be able to connect to it from home! He also wanted to have a platform to use to experiment with the properties of the Intel 386, but that's another story. Torvalds needed an operating system capable of such tasks. Linux was born. It took Torvalds the better part of a year to come up with the very first version of Linux, during which he worked alone in a darkened room. In 1991, he announced his creation to the world, describing Linux as "just a hobby," and saying it would never be big. It wouldn't be until 1994 that it reached version 1.0.

In the early days, Torvalds's creation was fairly primitive. He was passionate that it should be free for everyone to use, and so he released it under a software license that said that no one could ever sell it. However, he quickly changed his mind, adopting the GNU Public License.

Torvalds was made wealthy by his creation, courtesy of the dot.com boom of the late 1990s, even though this was never his intention; he was driven by altruism. Nowadays, he lives in Portland, Oregon, with his wife and children, having moved to the United States from Finland in the late 1990s.

Initially, Torvalds worked for Transmeta, developing CPU architectures as well as overseeing kernel development, although this wasn't part of his official work. He still programs the kernel, but currently he oversees the Open Source Development Lab, an organization created to encourage open source adoption in industry and which is also referred to as the home of Linux.

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Beginning SUSE Linux from Novice to Professional
Beginning SUSE Linux: From Novice to Professional
ISBN: 1590594584
EAN: 2147483647
Year: 2005
Pages: 293
Authors: Keir Thomas

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