linux论文文献

你可以通过以下三种方法安装Apache服务器。1．如果你安装的Linux版本中带用Apache的话，就在选择所要安装的服务器的时候，将httpd这个服务选上，Linux安装程序将自动完成Apache的安装工作，并做好基本的配置。2．使用可执行文件软件包，这比较适合那些对编译工作不是太熟悉的初级用户，因为它相对比较简单。下载软件包 xvzf 这就完成了安装工作，简单吧！如果你使用的是RedHat Linux的话，你也可以下载软件安装包，然后使用rpm -ivh 命令安装。3．如果你想把Apache服务器充分利用起来的话，就一定要自己编译Apache定制其功能。下载包含Apache源代码的软件包； 然后用tar命令将它解开； 将当前目录改变为Apache源代码发行版的src目录； 将配置样本文件（）复制为Configuration文件；编辑Configuration文件中的配置选项：Makefile配置选项：一些编译选项：. "CC="一行指定用什么编译软件编译，一般为"CC=gcc"；. 如果需要将额外的标志（参数）指定给C编译软件，可以使用：EXTRA_CFLAGS=EXTRA_LFLAGS=. 如果系统需要特殊的库和包含文件，可以在这里指定它们：EXTRA_LIBS=EXTRA_INCLUDES=. 如果你要改变代码优化设置的话，你须将下面一句去掉注释，然后改成你所需要的值：#OPTIM=-O2Rule配置选项：用来决定需要什么功能，一般情况下无需改变。模块配置：模块是Apache的组成部分，它为Apache内核增加新功能。通过使用模块配置，可以自定义在Apache服务器中需要什么功能，这个部分也是Apache灵活性的表现。模块配置行如下所示：AddModule modules/standard/如果你需要Apache服务器具备什么功能，就将那个模块用AddModule语句加到配置文件Configuration中去。下表列出了Apache的模块功能：模块名 功能 缺省mod_access 提供基于主机的访问控制命令 ymod_actions 能够运行基于MIME类型的CGI脚本或HTTP请求方法 ymod_alias 能执行URL重定向服务 ymod_asis 使文档能在没有HTTP头标的情况下被发送到客户端 ymod_auth 支持使用存储在文本文件中的用户名、口令实现认证 ymod_auth_dbm 支持使用DBM文件存储基本HTTP认证 nmod_auth_mysql 支持使用MySQL数据库实现基本HTTP认证 nmod_auth_anon 允许以匿名方式访问需要认证的区域 ymod_auth_external支持使用第三方认证 nmod_autoindex 当缺少索引文件时，自动生成动态目录列表 ymod_cern_meta 提供对元信息的支持 nmod_cgi 支持CGI ymod_dir 能够重定向任何对不包括尾部斜杠字符命令的请求 ymod_env 使你能够将环境变量传递给CGI或SSI脚本 nmod_expires 让你确定Apache在服务器响应请求时如何处理Expires ymod_headers 能够操作HTTP应答头标 ymod_imap 提供图形映射支持 nmod_include 使支持SSI nmod_info 对服务器配置提供了全面的描述 ymod_log_agent 允许在单独的日志文件中存储用户代理的信息 nmod_log_config 支持记录日志 ymod_log_referer 提供了将请求中的Referer头标写入日志的功能 nmod_mime 用来向客户端提供有关文档的元信息 ymod_negotiation 提供了对内容协商的支持 ymod_setenvif 使你能够创建定制环境变量 ymod_speling 使你能够处理含有拼写错误或大小写错误的URL请求 nmod_status 允许管理员通过WEB管理Apache ymod_unique_id 为每个请求提供在非常特殊的条件下保证是唯一的标识 n在src目录下执行：". /configure"；编译Apache：执行命令"make"；根据机器性能的不同，经历一段5-30分钟的编译，就大功告成了。将编译好的可执行文件httpd复制到/etc/httpd/bin目录下；将Apache发行版的配置文件：、、、文件复制到/etc/httpd/conf目录下。到此为止，安装完成。

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Conflict-Based Checking the Integrity of Linux Package Dependencies作者：Yuqing LAN ；Mingxia KUANG ；Wenbin ZHOU 期刊：IEICE transactions on information and systems EISCI 年，卷(期)：2011, E94-D(12) A Linux operating system release is composed of a large number of software packages, with complex dependencies. The management of dependency relationship is the foundation of building and maintaining a Linux operating system release, and checking the integrity of the dependencies is the key of the dependency management. The widespread adoption of Linux operating systems in many areas of the information technology society has drawn the attention on the issues regarding how to check the integrity of complexity dependencies of Linux packages and how to manage a huge number of packages in a consistent and effective way. Linux distributions have already provided the tools for managing the tasks of installing, removing and upgrading the packages they were made of. A number of tools have been provided to handle these tasks on the client side. However, there is a lack of tools that could help the distribution editors to maintain the integrity of Linux package dependencies on the server side. In this paper we present a method based on conflict to check the integrity of Linux package dependencies. From the perspective of conflict, this method achieves the goal to check the integrity of package dependencies on the server side by removing the conflict associating with the packages. Our contribution provides an effective and automatic way to support distribution editors in handling those issues. Experiments using this method are very successful in checking the integrity of package dependencies in Linux software distributions.

Linux (also known as GNU/Linux) is a Unix-like computer operating system. It is one of the most prominent examples of open source development and free software; unlike proprietary operating systems such as Microsoft Windows or Mac OS X, its underlying source code is generally available for anyone to use, modify, and redistribute freely. Initially, Linux was primarily developed and used by individual enthusiasts on personal computers. Since then, Linux has gained the support of major corporations such as IBM, Sun Microsystems, Hewlett-Packard, and Novell, Inc. for use in servers and is gaining popularity in the personal computer market.[1] It is used in systems ranging from supercomputers to mobile phones. Proponents and analysts attribute its success to its security, reliability,[2] low cost, and freedom from vendor lock-in.[3] [edit]History Image:Linus Linus Torvalds, creator of the Linux 1983, Richard Stallman founded the GNU Project, with the goal of developing a complete Unix-like operating system composed entirely of free software. By the beginning of the 1990s, GNU had produced or collected most of the necessary components of this system — libraries, compilers, text editors, a Unix shell — except for the core component, the kernel. The GNU project began developing a kernel, the GNU Hurd, in 1990, based on the Mach microkernel, but the development of this Mach-based design proved difficult and proceeded slowly. Meanwhile, in 1991, another kernel was begun as a hobby by Finnish university student Linus Torvalds while attending the University of Helsinki.[4] Torvalds originally used Minix on his own computer, a simplified Unix-like system written by Andrew Tanenbaum for teaching operating system design. However, Tanenbaum did not permit others to extend his operating system, leading Torvalds to create a replacement for Minix. Originally, Torvalds called his kernel "Freax" for "free" and "freak" and with the often-used X in the names of Unix-like systems. The name "Linux" was coined by Ari Lemmke, who administered an FTP server belonging to the Finnish University Network; he invented the name Linux for the directory from which Torvalds' project was first available for download.[5] Image: A graphic history of Unix systems. Linux is a Unix-type system but its source code does not descend from the original first a computer running Minix was necessary in order to configure and install Linux. Initial versions of Linux also required another operating system to be present in order to boot from a hard disk, but soon there were independent boot loaders such as LILO. The Linux system quickly surpassed Minix in functionality; Torvalds and other early Linux kernel developers adapted their work for the GNU components and user-space programs to create a complete, fully functional, and free operating system. Today, Torvalds continues to direct the development of the kernel, while other subsystems such as the GNU components continue to be developed separately (Linux kernel development is not part of the GNU Project). Other groups and companies combine and distribute these components with additional application software in the form of Linux distributions. [edit]Portability See also: Linux (kernel) The Linux kernel was originally designed only for Intel 80386 microprocessors, but now supports a wide variety of computer architectures. Linux is one of the most widely ported operating systems, running on a diverse range of systems from the hand-held ARM-based iPAQ to the mainframe IBM System z9. Specialised distributions exist for less mainstream architectures. [edit]Copyright, licensing, and the Linux trademark The Linux kernel and most GNU software are licensed under the GNU General Public License. The GPL requires that all distributed source code modifications and derived works also be licensed under the GPL, and is sometimes referred to as a "share and share-alike" or "copyleft" license. In 1997, Linus Torvalds stated, "Making Linux GPL'd was definitely the best thing I ever did."[6] Other software may use other licenses; many libraries use the GNU Lesser General Public License (LGPL), a more permissive variant of the GPL, and the X Window System uses the MIT License. In the United States, the name Linux is a trademark[7] registered to Linus Torvalds. Initially, nobody registered it, but on August 15, 1994, William R. Della Croce, Jr. filed for the trademark Linux, and then demanded royalties from Linux distributors. In 1996, Torvalds and some affected organizations sued to have the trademark assigned to Torvalds, and in 1997 the case was settled[8] . The licensing of the trademark is now handled by the Linux Mark Institute. Torvalds has stated that he only trademarked the name to prevent someone else from using it, but was bound in 2005 by United States trademark law to take active measures to enforce the trademark. As a result, the LMI sent out a number of letters to distribution vendors requesting that a fee be paid for the use of the name, and a number of companies have complied.[9] [edit]PronunciationIn 1992, Torvalds explained how he pronounces the word Linux: “ 'li' is pronounced with a short [ee] sound: compare prInt, mInImal etc. 'nux' is also short, non-diphthong, like in pUt {IPA /ʊ/}. It's partly due to minix: linux was just my working name for the thing, and as I wrote it to replace minix on my system, the result is what it is... linus' minix became linux. „ — Linus Torvalds , newsgroup[5] An audio file of Torvalds saying "Hello, this is Linus Torvalds, and I pronounce Linux as Linux" can be found here. Note that in English, "Linux" and "Minix" are usually pronounced with a short i (IPA: /ɪ/) sound that is different from Torvalds' Finland-Swedish pronunciation of these words. [edit]Linux and the GNU Project Image:Richard Matthew Richard Stallman, founder of the GNU project for a free operating article: GNU/Linux naming controversyThe goal of the GNU project is to produce a Unix-compatible operating system consisting entirely of free software, and most general-purpose Linux distributions rely on GNU libraries and tools written to that effect. The Free Software Foundation views these Linux distributions as "variants" of the GNU system, and asks that such operating systems be referred to as GNU/Linux or a Linux-based GNU system. While some distributions make a point of using the combined form - notably Debian GNU/Linux - its use outside of the enthusiast community is limited, and Linus Torvalds has said that he finds calling Linux in general GNU/Linux "just ridiculous" [10] . The distinction between the Linux kernel and distributions based on it is a source of confusion to many newcomers, and the naming remains controversial. [edit]SCO litigation Main article: SCO-Linux controversiesIn March 2003, the SCO Group filed a lawsuit against IBM, claiming that IBM had contributed portions of SCO's copyrighted code to the Linux kernel in violation of IBM's license to use Unix. Additionally, SCO sent letters to a number of companies warning that their use of Linux without a license from SCO may be actionable, and claimed in the press that they would be suing individual Linux users. This controversy has involved lawsuits by SCO against DaimlerChrysler (dismissed in 2004), and AutoZone, and by Red Hat and others against SCO. Furthermore, whether SCO even owns the relevant Unix copyrights is currently disputed by Novell. As per the Utah District Court ruling on July 3, 2006; 182 claims out of 294 claims made by SCO against IBM have been dismissed.[11] SCO's claims have varied widely. As of 2006, no proof of SCO's claims of copied code in Linux has been provided. [edit]Development efforts More Than a Gigabuck: Estimating GNU/Linux's Size, a 2001 study of Red Hat Linux , found that this distribution contained 30 million source lines of code.[12] Using the Constructive Cost Model, the study estimated that this distribution required about eight thousand man-years of development time. According to the study, if all this software had been developed by conventional proprietary means, it would have cost about billion dollars (year 2000 . dollars) to develop in the United States. The majority of the code (71%) was written in the C programming language, but many other languages were used, including C++, Lisp, assembly language, Perl, Fortran, Python and various shell scripting languages. Slightly over half of all lines of code were licensed under the GPL. The Linux kernel was million lines of code, or 8% of the total. In a later study, Counting potatoes: The size of Debian , the same analysis was performed for Debian GNU/Linux version .[13] This distribution contained over fifty-five million source lines of code, and the study estimated that it would have cost billion dollars (year 2000 . dollars) to develop by conventional means. [edit]Applications Image: A KDE desktop on the SUSE has historically been used mainly as a server operating system, but its low cost, flexibility, and Unix background make it suitable for a wide range of applications. Linux is the cornerstone of the "LAMP" server-software combination (Linux, Apache, MySQL, Perl/PHP/Python) which has achieved popularity among developers, and which is one of the more common platforms for website hosting. Due to its low cost and its high configurability, Linux is often used in embedded systems such as television set-top boxes, mobile phones, and handheld devices. Linux has become a major competitor to the proprietary Symbian OS found in many mobile phones, and it is an alternative to the dominant Windows CE and Palm OS operating systems on handheld devices. The popular TiVo digital video recorder uses a customized version of Linux. Several network firewall and router standalone products, including several from Linksys, use Linux internally, using its advanced firewalling and routing capabilities. Linux is increasingly common as an operating system for supercomputers. In the November 2005 TOP500 list of supercomputers, the two fastest supercomputers in the world ran Linux. Of the 500 systems, 371 () ran some version of Linux, including seven of the top ten. The Sony PlayStation 3 video game console, scheduled to be released in November 2006, will run Linux by default. Sony has previously released a PS2 Linux do-it-yourself kit for their PlayStation 2 video game console. Game developers like Atari and id Software have released titles to the Linux desktop. Linux Game Publishing also produces games for Linux, licensing and porting them from their Windows source code. The One Laptop Per Child project, which aims to provide computing devices to all children in developing nations, uses Linux as the devices' operating system. [edit]Distributions For more details on this topic, see Linux is predominantly used as part of a Linux distribution (commonly called a "distro"). These are compiled by individuals, loose-knit teams, and commercial and volunteer organizations. They commonly include additional system and application software, an installer system to ease initial system setup, and integrated management of software installation and upgrading. Distributions are created for many different purposes, including computer architecture support, localization to a specific region or language, real-time applications, and embedded systems, and many deliberately include only free software. Currently, over three hundred distributions are actively developed, with about a dozen distributions being most popular for general-purpose use.[14] A typical general-purpose distribution includes the Linux kernel, some GNU libraries and tools, command-line shells, the graphical X Window System and an accompanying desktop environment such as KDE or GNOME, together with thousands of application software packages, from office suites to compilers, text editors, and scientific tools. [edit]Desktop usage Image: A GNOME desktop running from the GNOME also: Comparison of Windows and Linux The high level of access granted to Linux's internals has led to Linux users traditionally tending to be more technologically oriented than users of Microsoft Windows and Mac OS, sometimes revelling in the tag of "hacker" or "geek". Linux and other free software projects have been frequently criticized for not going far enough to ensure ease of use.[citation needed] This stereotype has begun to be dispelled in recent years. Linux may now be used with a user interface that is very similar to those running on other operating systems. Users may have to switch application software, and there are often fewer "known" options (as in the case of computer games) but there exist replacements for all general-purpose software, and general applications like spreadsheets, word processors, and browsers are available for Linux in profusion. Additionally, a growing number of proprietary software vendors are supporting Linux,[15] and compatibility layers such as the Wine system allow some Windows application software and drivers to be used on Linux without requiring the vendor to adapt them. Linux's roots in the Unix operating system mean that while graphical configuration tools and control panels are available for many system settings and services, plain-text configuration files are still commonly used to configure the OS and may be exposed to users. In general, the command shell does not protect against accidents like file deletion, and the user interfaces of older programs are sometimes inconsistent. The Berlin-based organization Relevantive concluded in 2003 that the usability of Linux for a set of desktop-related tasks was "nearly equal to Windows XP."[16] Since then, there have been numerous independent studies and articles which indicate that a modern Linux desktop using either GNOME or KDE is on par with Microsoft Windows in a business setting.[17] [edit]Market share and uptake Further information: Linux adoption According to the market research company IDC, 25% of servers and of desktop computers ran Linux as of 2004.[18] The Linux market is rapidly growing and the revenue of servers, desktops, and packaged software running Linux is expected to exceed $ billion by 2008.[19] The actual installed user base may be higher than indicated by this figure, as most Linux distributions and applications are freely available and redistributable. The paper Why Open Source Software / Free Software (OSS/FS)? Look at the Numbers![20] identifies many quantitative studies of open source software, on topics including market share and reliability, with many studies specifically examining Linux. [edit]Installation The most common method of installing Linux on a personal computer is by booting from a CD-ROM that contains the installation program and installable software. Such a CD can be burned from a downloaded ISO image, purchased alone for a low price, can be obtained as part of a box set that may also include manuals and additional commercial software and in a few cases shipped for free by request. Mini CD images allow Linux to be installed from a disk with a small form factor. As with servers, personal computers that come with Linux already installed are available from vendors including Hewlett-Packard and Dell, although generally only for their business desktop line. Alternatives to traditional desktop installation include thin client installation, where the operating system is loaded and run from a centralised machine over a network connection; and running from a Live CD, where the computer boots the entire operating system from CD without first installing it on the computer's hard disk. On embedded devices, Linux is typically held in the device's firmware and may or may not be consumer-accessible. [edit]Programming on Linux GNU Compiler Collection (GCC) is the de facto standard compiler for Linux. GCC provides frontends for C, [[C++]], Java and others. Most distributions also come installed with Perl, Python and other language interpreters, and several now include C# via the Mono project. There are a number of Integrated development environments available including KDevelop, Anjuta, NetBeans, and Eclipse while the traditional editors Emacs and Vim remain popular.[citation needed] The two main widget toolkits used for contemporary GUI programming are Qt and the Gimp Toolkit, known as [[GTK+]]. As well as these free and open source options, there are proprietary compilers and tools available from a range of companies such as Intel,[21] PathScale[22] and the Portland Group.[23] [edit]Support Technical support is provided by commercial suppliers and by other Linux users, usually in online forums, IRC, newsgroups, and mailing lists. Linux User Groups have traditionally been organized to provide support for Linux in specific cities and regions. The business model of commercial suppliers is generally dependent on charging for support, especially for business users. A number of companies offer a specialized business version of their distribution, which adds proprietary support packages and tools to administer higher numbers of installations or to simplify administrative tasks.