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软件类型:国外书籍 软件分类:FreeBSD 授权方式:免费版 界面语言:英文 软件大小:8321KB 运行环境:Win9x,NT,2000,XP,2003 软件等级:★★★☆☆ 发布时间:2010-03-15 下载次数:
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FreeBSD Unleashed电子书籍介绍
FreeBSD Unleashed

Twenty years ago, when the first personal computers were being sold, could anyone have accurately predicted what they would be used for at the turn of the century? Could anyone have guessed that Microsoft would become as omnipresent a force in the computer industry as IBM was at that time? Was there any indication to predict the rise of open-source software and its contention against Microsoft for market share? Could anyone have imagined that in 2001, IBM would be funding Linux development, seemingly facing off against Microsoft itself?

Even today, it's not necessarily any easier to tell what the picture is like, thanks to the fast pace of technology development. Determining which products and which companies are the ones that will be with us for another 20 years, and which ones are doomed to failure is a fruitless pursuit, made even more difficult by the inherent limitations on the accuracy of any kind of survey mechanism to find out what's actually being used on the Internet. Even so, it's clear from recent general trends that Internet server roles are being filled decreasingly often by commercial UNIX operating systems, increasingly often by versions of Microsoft Windows, and even more increasingly often by open-source UNIX systems or workalikes. Chief among these in the industry news headlines is Linux in its myriad forms. Linux, developed as a grass-roots effort with more and more corporate backing in recent years, has achieved legitimacy through its market success and reputation for reliability and performance, and even through Microsoft's recent attempts to denounce it as a great enemy to the concept of intellectual property. Whether you love it or hate it, open-source software like Linux is here to stay.

However, a frequently overlooked fact is that Linux is not UNIX; it's properly called "UNIX-like," in that it performs the same functions as most commercially sold UNIX variants do, but was developed entirely by its user community. The guiding principles of the project are embodied in the GPL, the GNU General Public License, which states in part that any code developed under it must be made freely available. This extends to commercial software development bodies who must re-release as freely available source any software that they develop from earlier materials.

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