Red hat linux-red hat, Rehl, Fedora, CentOS

Source: Internet
Author: User
Tags plesk

Red hat linux-red hat, Rehl, Fedora, CentOS(2011-05-21 14:26:10) reproduced
Tags:redhatlinuxit Category: Understanding

Red Hat Linux is Redhat's earliest release of the personal version of Linux, with its 1. Version 0 was released on November 3, 1994.

Although its history is not as long as other Linux distributions, Red Hat has a much longer history than many Linux distribution packages.

    since red Hat 9. After the release of the 0 release, RedHat Company no longer developed the desktop version of the Linux distribution suite, Red Hat Linux stopped development, and the full force on the development of the server version, that is, Red Hat Enterprise Linux. Red Hat formally discontinued Red Hat 9 on April 30, 2004. Support for version 0 marks the official end of Red Hat Linux. the original desktop version of the Red Hat Linux distribution suite was merged with the Fedora program from the open source community to become the Fedora Core release . Red Hat currently has two distributions,

    Red Hat Enterprise Linux (abbreviated to rhel,red Hat's corporate edition) . Red hat is now primarily a server version of Linux development, with a focus on performance and stability and hardware support. Version updates are relatively slow due to the long development cycle of Enterprise Edition operating systems, which focus on performance, stability, and server-side software support. This version is for a fee.     RedHat Enterprise Linux is also divided into 4 versions of Advanced Server (AS), ES Workstation (WS), Desktop, they are not very different, but functional differences. As on the basis of the standard Linux kernel, the performance is enhanced and the reliability is improved, and the drivers of many common servers are integrated. Devices such as disk-array cards for common rack servers such as IBM/DELL/HP can be easily identified. As major version 2.x/3.x/4.x, which is what we call As3/as4 each version has a number of upgrades, such as the first launch of the AS4, encountered some updates at this time will be released AS4 Update1, there will be AS4 update2/ Update3, such as the emergence of abbreviation AS4U1/AS4U2/AS4U3. This and Microsoft's release form is also very similar, Microsoft's Windows NT4 from SP1 to sp6,windows2000 from SP1 out to SP4 .... As these update versions contain a certain difference in the main package versions, it is best not to mix them up otherwise it is prone to problems. Prima and Plesk's installation packages, for various distributions have a targeted design on the download page, which is usually identified, which versions and which update systems are supported. ES, is a lite version of AS. The difference between him and the common as series is that as supports up to 4 CPUs, and ES supports only two CPUs. As and Es are no different on most packages, only a few packages on the kernel. The price difference between as and ES is large, usually es is used in the OEM version purchased with the server, such as the purchase of Dell servers, paired with Linux will be the ES series. If you want to match the as series, you need to spend thousands of yuan more. WS, is a further simplified version of ES, mainly for the Enterprise internal desktop office market, less domestic use.

    Redhat Fedora Core Linux and Enterprise Linux all need to follow the GNU protocol to publish their own source code. So, for free Fedora Core Linux, you can download the ISO engraving directly from the Redhat website and download it to the srpm ISO, the package source CD. For paid Enterprise Linux series, is a commercial product, so the website can not be downloaded to the ISO file, need to purchase the official authorized party. a project named Community Enterprise Operating System was born. His initials are both CentOS . The CentOS community will download all the source code on Redhat's website and recompile it. After recompilation, since AS/ES/WS is a commercial product, all Redhat logos and logos must be changed to their own CentOS logo. For example, the AS4 original srpm source code compiled, it became the CentOS 4.0. After compiling the source code of AS4UPDATE1, it becomes the CentOS4.1. After compiling the source code of As4update2, it becomes the CentOS4.2. Similarly, the 3.x/4.x of CentOS corresponds to the corresponding version. So we say that CentOS is the free version of Redhat's as/es/ws. With CentOS, you get the same performance and feel as as/es. In addition to providing a standard number 1~4 or several ISO's, CentOS also provides a minimal 1CD server CD. The system installed with the server CD-ROM is a minimized Linux kernel plus commonly used httpd/mysql packages that do not include xwindows desktops and other useless software for the server. Prima, Plesk, Virtuozzo and so on can be installed.

Therefore, it can be said that CentOS is the free version of Redhat As/es/ws, using CentOS to get the same functionality and performance as Redhat Enterprise Linux. CentOS also offers free long-term upgrade and update Services. As a result, CentOS is outstanding and excellent in many of the clone versions of Rhel. Although CentOS is a clone of Rhel, it's not exactly the same, and the clones are 100% interchangeable. For CentOS is not the same, Rhel software on CentOS does not guarantee that 100% of normal work.

Fedora Core (FC) is now the predecessor of Fedora is Red Hat Linux. In September 2003, Red Hat suddenly announced that it would no longer launch its personal-use distribution kit (the last version of Red Hat Linux9.0) and focus on the development of a commercial version of the Desktop Suite (Red Hat Enterprise Linux). But Red Hat has also announced the integration of the original Red Hat Linux development program and Fedora program into a new Fedora project. Fedora Project will be sponsored by Red Hat, improved with Red Hat Linux 9 as a model, the original development team will continue to participate in the Fedora development program, but also encourage the open source community to participate in development work, since Fedora Core 6 changed to Fedor A, the latest version of Fedora 12.

Fedora is positioned as an experimental site for new technologies by Red Hat, and many new technologies are tested in Fedora , and Red Hat will consider joining Red Hat Enterprise Linux if it is stable. The Fedora version has a very short update period of only 6 months. Fedora is not generally recommended on the server due to the frequent version updates and the lack of guaranteed performance and stability. As a matter of fact, Fedora is the Red Hat version of Red Hat Enterprise Linux, an experimental release that is tested by users and builds on the Red Hat Enterprise release.

selection of Red Hat Linux versions

The Red Hat Linux series complements each other: If you first touch Linux, it is recommended that you install Fedora Core First, Fedora Core installation is simple, the hardware support is very good, the interface is gorgeous, but also can experience redhat The latest Linux features; If you have a certain understanding of Linux and need to learn more, it is recommended that you use the CentOS system; If you are doing Linux enterprise applications, it is recommended that you use the Rhel version.


Red hat linux-red hat, Rehl, Fedora, CentOS

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