What is the application and development of Linux,linux

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what is Linux ? is a set of unix-like operating system, is a Unix, it control all the System Fundamental Service Center Program (kernel) is developed by the Linus, "linux" this title is "linus ' s unix" to name, Linus select with " Public copyright "(GPL) method to issue this procedure, this copyright to anyone in any form to copy and distribute the initial program of Linux, in other words, Linux is actually" free ", the user on the network can catch Linux's initial program code, arbitrary imitation and change Linux's initial program, in the growing popularity of the Internet and Linux open and comfortable under the copyright, attracted a lot of computer experts to develop, improve the Linux central program, so that the function of Linux is becoming stronger, so today we can download free Linux use on the network, Linux CDs may be available at a fraction of the cost, because Linux is the copyright of the GPL.

In addition to the core program, an operating system requires other system programs and applications to be practical, most of the system programs used in Linux systems are software developed by the Free Software Foundation, and many organizations or individuals Linux development applications, these programs are mostly free software, anyone can get free on the network, but to get these programs on their own one by one installation is very inconvenient, so some companies or organizations will collect, integrate Linux programs, the " Core-System Program-application "together constitute a complete operating system, so that the general user can easily install the entire system, this is the so-called" installation package "(distribution), we generally speak of the Linux system for these installation packages, the same is Linux system, but divided into different companies, organizations, the integration of different installation packages, which is often seen on the network Linux there are so many "kind" reasons.

Linux has the UNIX System program interface and operation mode, but also inherited the UNIX stability and efficiency characteristics. Linux installed on the network host for more than a year without being a machine, do not have to shut down is a common thing, but Linux is not like the general Unix to bear the huge royalties, do not need to be dedicated to the expensive hardware can be used; Linux can be performed on a typical i386 PC with high performance , naturally received over the past decades on Unix accumulated program resources and users, coupled with the GPL copyright allows you to freely spread the original Linux code, and modify the program for their own needs, so that Linux has become a very popular multi-tasking, free, stable, high efficiency , and can be executed on many different computer system platforms including I386, Sparc, Alpha, Mips, PPC, etc.

Linux supports a variety of hardware devices such as x86, Motorola 68k, Digital Alpha, Sparc, Mips, Motorola PowerPC and arm, and more. Due to the open program code, hardware vendors do not have to pay additional copyright fees, it is possible for the production of self-produced hardware devices for Linux to develop the driver, improve product sales rate.

Software aspects, such as x, are the industry standard for window systems; In addition, Richard Storman-led Emacs provides a window version and text version of the document editing environment, the function is complex and powerful, a complete set of online description files, and the co-development of the spreadsheet, is the window version of the spreadsheet, Anyone who is familiar with Lotus and the people, see such fruitful results, will be inexplicable moved. Of course, the most praised is the network capabilities of Linux, whether it is slip, PPP, NetBEUI, DDP, X. or ISDN, and so on, Linux has a corresponding software supply, and stable server functions for the erection of intranet and the Internet.

The general user benefits from the GNU GPL and LGPL protection, which can be used to obtain complete Linux from different pipelines, so Linux can be "free (gratis)". Linux is cheap and inexpensive compared to UNIX's expensive copyright fees.

• Multi-tasking: This means that Linux can serve the needs of many people in the same period of time. In a word, you can listen to the Titanic's soundtrack CD, edit the paperwork while you print the file, and play the X version of Tetris at any time.
• Multi-CPU Support: This is definitely not an NT patent, Linux also supports this hardware architecture, representing faster operations and revolutionary algorithms will become the mainstream of the Times.
· RAM Protection mode: The program (processes) does not interfere with each other, to ensure that the system can work long and correct. According to many people downloading the system Assessment Program (benchmarks) to test the performance of Linux, the results found that only with 486CPU pc, the performance will be comparable to the sun or Dec intermediate workstations.
• Dynamic Loader: When the program loads RAM execution, Linux only loads the associated program modules on the disk, effectively increasing the rate of execution and the management of RAM.
• Dynamic link sharing program Hall: This means that the size of the execution file is greatly reduced, helping to conserve disk space.
• Supports a variety of file systems: Known operating systems such as Minix, Xenix, System V, and so on. Future NT NTFS will also be included in the support.
• See DOS: This is so-called transparency (transparency); The DOS FAT file system is considered a special remote file system that can be used flexibly without any special instructions, just like a directory that exists under Linux.

Application of Linux

Without business activities, there is no Linux, no freedom of information, and it is impossible to have Linux.

In addition to being an excellent software development platform, Linux is also a good partner for work and home. Some people say: "With Linux, it is equal to have the lamp of Allah." "This is not false. Others say: "There is no software that has been ported to Linux, and there is certainly no value at all." "That's not a bad word."

The development of Linux confirms the tendency for information to become cheaper and the market expands indefinitely because it is cheap. Business activities are also turning to service-oriented patterns. The most straightforward case is the application of the ISP.

Linux can be used to erect isp!

The publisher of the Linux Journal SSC (Specialized System Consultants) is based on Linux as the network Dial-up service platform. To become an ISP, you need to have the ability to connect to the Internet, multi-sequence FU-dial services (such as software systems provided by companies such as Cycades, Maxspeed, Gtek, etc.), PPP and slip services, Usenet newsgroups (such as inn), mail delivery (such as SendMail) , Web server (such as Apache), backup functions (such as tar, cpio), and so on application software. From this observation, the main control costs will fall on the internet communication rental fees, the cost of investing in Linux is very low.

The development of Linux

In recent years, the development has made Linux become Microsoft, the other big enemy of Yang. Linux with its low price, good quality and stable competitive advantage, is invisible to the proliferation of many PC-based work platform. Because of the lack of commercial application software, it is impossible to penetrate the mainstream operating system of the general merchant because of the tool program with strong academic flavor. However, today's Linux is non-defeating, KDE, Gimp, GNOME and other plans to carry out successively, for X to provide more graphical interface of the desktop operating environment and application software.

About 1993 years ago, Linux first appeared in the form of release software (distribution). This is a complete set of software, including installers, cores, applications, X, drivers, and other software packages, downloaded to disk for installation via the Internet. At that time, the installation process was simple, difficult to install properly, insufficient interface affinity and poor hardware support is the biggest obstacle.

Later, the optical drive, CD-ROM media also came into being, and now the distribution software produced by Linux manufacturers are mainly issued by this medium. There are three kinds of red Hat, Slackware and Debian that are common in China. Among them, Debian is still a non-commercial type of heavyweight distribution software, the FSF has been a fund to help the development of its initial stage. Anyone can download the entire release software from the Debian FTP station. Of course, a business organization like Red Hat can be downloaded from an FTP station just like Red hat, but if you spend a little bit of money on discs, you get additional technical support and useful documentation.

The easiest way to get these discs is to buy books on Linux, whether in Chinese or English, with a copy of the release software on the back containing the company or organization. The general book will have a special chapter to explain the installation and set up the process, readers can be good use. Different distribution software has different installation mechanisms, but it is all Linux.

For domestic users, the most concerned about the development of Linux Chinese technology. X Window System has a stable Chinese version, a variety of Chinese input method and Chinese simulation window has entered the experienced period, I believe that the future will be oriented to the application of the cultural aspects of the development, so that X operating environment in line with the needs of domestic users.

Vigorously carry out the work of Linux software, to help China's independent software development, safeguard national information security, and in the international competition to win a little proportion.

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What is the application and development of Linux,linux