Since 2002, Red Hat has steadily expanded its range of open source, commercially focused operating system and middleware products. These products provide the industry's premier Linux environment for commercial deployments.

The operating system products, sold by annual subscription under the name Red Hat Enterprise Linux, have been rapidly adopted and supported by a wide range of Independent Software Vendors (ISVs) and Original Equipment Manufacturers (OEMs). They offer excellent performance, scalability, and security, and a comprehensive array of services delivered by Red Hat and its partners. As a result, Red Hat Enterprise Linux solutions deployed on certified commodity hardware and running a wide variety of enterprise caliber applications, are delivering the capabilities of traditional proprietary UNIX systems but at significantly lower cost.

The Red Hat Enterprise Linux family has been designed to cover the full spectrum of corporate operating environments in a simple and consistent manner. The family is comprised of four products, two designed for server systems, two designed for client systems. There is a high level of commonality across the products, thereby ensuring that application support, user environments, and management tools are consistent. The products are primarily differentiated by the level of system architecture support, system size, and service offerings Red Hat Enterprise Linux supports multiple hardware architectures including:

  • Intel x86compatible (32bit)

  • Intel Itanium2 (64bit)

  • Advanced Micro Devices AMD64 (64bit) and Intel EM64T

  • IBM POWER series (eServer iSeries and eServer pSeries)

  • IBM Mainframe (eServer zSeries and S/390)
Perhaps the most important feature of Red Hat's multi-architecture development process is that all implementations are built from identical source code. The primary benefit of this commonality is that all the products are completely compatible, regardless of architecture. This assists ISVs in supporting their applications on multiple architectures and also simplifies system administration and product support.
Red Hat Enterprise Linux provides benefits in four key areas:
Based on the LINUX 2.6 Kernel, Red hat Enterprise Linux 4 represent the most stable and mature commercial Linux available. Red Hat proved the Enterprise-class readiness of much of the 2.6 kernel technology in the Enterprise Linux 3 release. As a result, Red Hat Enterprise Linux 4 includes mature technology deployed successfully by many red hat customers and incorporates a number of key improvements, based on the Red Hat's Engineering efforts and collaboration with the open source developer community.
Red Hat Enterprise Linux 4 is the preferred platform for the most demanding security organizations in the world. Security enhanced is a completely new subsystem in Enterprise Linux and provides a superior security framework to what is available in traditional and commercial IT operating environments.
Red Hat Enterprise Linux 4 also incorporates the new standard auditing framework for Linux system which offers considerable flexibility so that system calls and their arguments can be filter by user, group, process and device with a variety of options.
In August 2004 Red hat Enterprise Linux 3 achieved control access Protection Profile compliance under the common criteria for information security evaluation (CC), commonly referred to as CAPP/EAL3+.

Red hat Enterprise Linux 4 includes core desktop applications such as :

  • Firefox TM, the new web browser that is taking the work by storm

  • OpenOffice, a high-Productivity, multi-Platform, open source office suite.

  • Evolution TM the most popular email and calendaring solution for Linux.

In addition, popular media applications such as Real Player ® and Acrobat Reader ® are included, Citrix ® and the open source Rdesktop application allow user to connect a windows terminal server to achieve heterogeneous remote desktop solutions.
Red Hat Enterprise Linux 4 includes a new Hardware abstraction layer that provides robust plug-and-play hardware support.
Samba-- Red Hat Enterprise Linux 4 Includes samba 3.0 for interoperability with windows file sharing and printing using the SMB/CIFS standards. The GNOME desktop environment automatically discover the local area network.

Red Hat Enterprise Linux 4 improves performance and scalability with the following features:
  • Ext file system and logical volume Manager 2 (LVM2)

  • Virtual Memory subsystem

  • I/O subsystem

  • Processor Scheduler for hyperthreaded and multicore devices

  • SMP and NUMA

  • n PCI Express

  • Networking Components

  • Auto Fsv.4

  • GCC 3.4
Red Hat continually testing and qualifying Red Hat Enterprise Linux on variety of systems. Please refer to for latest information on supported system configuration details, like the number of CPUs or the amount of memory supported for each Red Hat Enterprise Linux released.


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