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FAQ
Windows
Written by Administrator   
Tuesday, 26 May 2009 18:14
Q.  What is Windows Server 2008?

A.  

Windows Server 2008 is the most advanced Windows Server operating system yet, designed to power the next generation of networks, applications, and Web services. With Windows Server 2008 you can develop, deliver, and manage rich user experiences and applications, help provide a highly secure network infrastructure, and increase technological efficiency and value within your organization. Windows Server 2008 builds on the success and strengths of its Windows Server predecessors while delivering valuable new functionality and powerful improvements to the base operating system. New Web tools, virtualization technologies, security enhancements, and management utilities help save time, reduce costs, and provide a solid foundation for your information technology (IT) infrastructure. Learn more details by reading the Product Overview.

Q.  How can I evaluate Windows Server 2008?

A.  

There are several ways for you to evaluate Windows Server 2008:

Download an evaluation version
Take an online test drive of Windows Server 2008 (eight 10-15 minute self-driven demonstrations)
Try an online Virtual Lab (60-90 minute self-driven evaluations)
View further events, webcasts, and chats
Q.  What editions/versions does Windows Server 2008 come in?

A.  

Windows Server 2008 will be released with eight editions which include:

Windows Server 2008 Standard
Windows  Server 2008 is the most robust Windows Server operating system to date. With built-in, enhanced Web and virtualization capabilities, it is designed to increase the reliability and flexibility of your server infrastructure while helping save time and reduce costs. Powerful tools give you greater control over your servers, and streamline configuration and management tasks. Plus, enhanced security features work to harden the operating system to help protect your data and network, and provide a solid, highly dependable foundation for your business.
Windows Server 2008 Enterprise
Windows Server 2008 Enterprise delivers an enterprise-class platform for deploying business-critical applications. It helps improve availability with clustering and hot-add processor capabilities, helps improve security with consolidated identity management features, and reduces infrastructure costs by consolidating applications with virtualization licensing rights. Windows Server 2008 Enterprise provides the foundation for a highly dynamic, scalable IT infrastructure.
Windows Server 2008 Datacenter
Windows Server 2008 Datacenter delivers an enterprise-class platform for deploying business-critical applications and large-scale virtualization on small and large servers. It improves availability with clustering and dynamic hardware partitioning capabilities, reduces infrastructure costs by consolidating applications with unlimited virtualization licensing rights, and scales from 2 to 64 processors. Windows Server 2008 Datacenter provides a foundation on which to build enterprise-class virtualization and scale-up solutions.
Windows Web Server 2008
Designed to be used specifically as a single-purpose Web server, Windows Web Server 2008 provides a rock-solid foundation of Web infrastructure capabilities in the next-generation Windows Server 2008. Integrated with the newly re-architected IIS 7.0, ASP.NET, and the Microsoft .NET Framework, Windows Web Server 2008 enables any organization to rapidly deploy Web pages, Web sites, Web applications, and Web services.
Windows Server 2008 for Itanium-Based Systems
Windows Server 2008 for Itanium-Based Systems is optimized for large databases, line of business, and custom applications providing high availability and scalability with up to 64 processors to meet the needs of demanding and mission-critical solutions.
Windows Server 2008 Standard without Hyper-V
Windows Server 2008 Standard is the most robust Windows Server operating system to date. It is designed to increase the reliability and flexibility of your server infrastructure while helping save time and reduce costs. Powerful tools give you greater control over your servers, and streamline configuration and management tasks. Plus, enhanced security features work to harden the operating system to help protect your data and network, and provide a solid, highly dependable foundation for your business. This product does not include Windows Server Hyper-V.
Windows Server 2008 Enterprise without Hyper-v
Windows Server 2008 Enterprise delivers an enterprise-class platform for deploying business-critical applications. It improves availability with clustering and hot-add processor capabilities, improves security with consolidated identity management features, and reduces infrastructure costs by consolidating applications with virtualization licensing rights. Windows Server 2008 Enterprise provides the foundation for a highly dynamic, scalable IT infrastructure. This product does not include Windows Server Hyper-V.
Windows Server 2008 Datacenter without Hyper-v
Windows Server 2008 Datacenter delivers an enterprise-class platform for deploying business-critical applications and large-scale virtualization on small and large servers. It improves availability with clustering and dynamic hardware partitioning capabilities, reduces infrastructure costs by consolidating applications with unlimited virtualization licensing rights, and scales from 2 to 64 processors. Windows Server 2008 Datacenter provides a foundation on which to build enterprise-class virtualization and scale-up solutions. This product does not include Windows Server Hyper-V.
Q.  When will Windows Server 2008 be available for purchase?

A.  

Windows Server 2008 was launched on February 27, 2008, in Los Angeles, and is available for evaluation.

Q.  How much will Windows Server 2008 cost?

A.  

Further information on pricing and licensing can be found at the Pricing and Licensing page.

Q.  Why should I upgrade to Windows Server 2008 from previous versions of Windows Server?

A.  

Windows Server 2008 provides the latest release of the Windows Server platform. With each release, Microsoft introduces new technology while still focusing on core areas, including:

Virtualization with Hyper-V.
A world-class Web and applications platform.
Improved networking performance.
Enhanced security and compliance.
Taking back control over your branch offices.
Server management made easier.
Enhanced scripting and task automation.
Centralized application access.
Prevent unhealthy computers from entering the network.
Better together with Windows Vista.
Learn more at the Why Upgrade page
Q.  What’s new in Windows Server 2008?

A.  

Windows Server 2008 provides a solid foundation for your business, and has many new and enhanced features and functionality for virtualization, Web platform, and security. Read more about new features.

Q.  What usage scenarios does Windows Server 2008 support?

A.  

Windows Server 2008 focuses on 10 core scenarios, including virtualization, high-performance computing (HPC), Web platform, security, and more. More information can be found at the Windows Server 2008 Scenario site.

Q.  What is virtualization? Does Windows Server 2008 offer virtualization technology?

A.  

Virtualization applications, such as Virtual Server 2005 and Hyper-V, allow information technology personnel to virtualize hardware resources, such as CPU, RAM, hard disk, and network controllers, to create fully functional virtual machines that can run their own operating system and applications just like a physical computer. Windows Server 2008 will include Windows Server Hyper-V, a powerful virtualization technology with strong management and security features. Hyper-V will help businesses reduce costs, increase agility and system availability for production server consolidation, disaster recovery, test and development, and, when coupled with System Center Virtual Machine Manager, the end-to-end management of dynamic data centers. You can learn more about Microsoft Virtualization solutions by visiting the Virtualization Center.

Q.  What management improvements does Windows Server 2008 provide?

A.  

Simplifying the day-to-day complexities of server administration is a key theme in many of the enhancements included in Windows Server 2008. New management tools, like the Server Manager Console, provide a single, unified console for managing a server's configuration and system information, displaying server status, identifying problems with server role configuration, and managing all roles installed on the server. You can learn more by visiting the Server Management page.

Q.  What is Windows Server 2008 Server Core installation option?

A.  

The Server Core installation option of the Windows Server 2008 operating system is a new option for installing Windows Server 2008. A Server Core installation provides a minimal environment for running specific server roles that reduces the maintenance and management requirements and the attack surface for those server roles. To provide this minimal environment, a Server Core installation installs only the subset of the binaries that are required by the supported server roles. For example, the Explorer shell is not installed as part of a Server Core installation. Instead, the default user interface for a Server Core installation is the command prompt. Once you have installed and configured the server, you can manage it either locally at the command prompt or remotely by using Remote Desktop. You can also manage the server remotely by using the Microsoft Management Console (MMC) or command-line tools that support remote use.

Q.  What Identity Management enhancements does Windows Server 2008 provide?

A.  

Windows Server 2008 expands on the Microsoft Identity and Access foundation with several new features and technologies to help organizations improve operational efficiency, simplify compliance, and strengthen security.   These include read-only domain controllers (RODC), AD Server Core role, enhancements in authentication support, and other new and improved features for information protection. You can see the entire list at the Identity and Access Management page.

Q.  What changes have there been in Windows Server 2008 Terminal Services?

A.  

With Terminal Services in Windows Server 2008, Microsoft releases its most powerful centralized application platform ever, offering an impressive array of new capabilities that dramatically improve the administrator and user experiences. Terminal Services now provides centralized access to individual applications without the need to provide the whole remote desktop. Applications running remotely are integrated with the local user’s desktop—looking, feeling, and behaving like local applications. Organizations can provide more secure access to centralized applications or desktops, and other resources from the Internet, by using HTTPS, without needing to provide access via a virtual private network (VPN) or opening up unwanted ports on firewalls. This reduces the complexity needed to provide secure remote access to applications and data for users, partners, or customers. For deployments with several servers, the new load-balancing features provide a simple way to ensure optimal performance by spreading sessions among the least-loaded available resources. Further information can be found at the Presentation Virtualization page.

Q.  Have there been any clustering enhancements for Windows Server 2008?

A.  

In Windows Server 2008, the improvements to failover clusters (formerly known as server clusters) are aimed at simplifying clusters, making them more secure, and enhancing cluster stability. These include new cluster validation tools, improvement to setup and migration, improvements to management and operations, infrastructure, storage, security, and networking. You can find further information on Windows Server 2008 clustering by visiting the High Availability page.

Q.  How secure is Windows Server 2008?

A.  

Windows Server 2008 has been designed with security fully in mind. Some of the primary new security benefits in the operating system help your organization to:

Protect your network against unauthorized or unhealthy computers.
Deploy small footprint specialized servers.
More highly secure server communication.
Improve branch office security.
Reduce server attack surfaces.
Control service security.
Provide best-of-breed data encryption.
You can learn more about the security enhancements of Windows Server 2008 by visiting the Security and Policy Enforcement page.

Q.  What is Network Access Protection?

A.  

Network Access Protection (NAP) addresses the industry-wide problem of unhealthy computers accessing and compromising an organization's network. NAP is used to help ensure that any computer connecting to the network meets the health requirements defined by your company policy, to limit network access for computers not meeting the predefined requirements, to provide remediation services to get those computers back to a healthy state, and to provide ongoing compliance-checking. Learn more by visiting the Security and Policy Enforcement page.

Q.  How does Windows Server 2008 support my Web applications?

A.  

Windows Server 2008 provides a highly secure, easy-to-manage platform for developing and reliably hosting applications and services that are delivered from the server or over the Web. New features include simplified management, increased security, and both performance and extensibility improvements which deliver a unified platform for Web publishing that integrates Internet Information Services 7.0 (IIS 7.0), ASP.NET, Windows Communication Foundation, and Microsoft Windows SharePoint Services. You can learn more by visiting the Web and Application Platform page.

Q.  Have there been any other core enhancements in Windows Server 2008?

A.  

There have been numerous new and existing enhancements for core features with the introduction of Windows Server 2008, many of which can be viewed on the Compare Editions pages.

Q.  How does Windows Server 2008 work with Windows Vista?

A.  

Both the Windows Vista operating system and Windows Server 2008 provide numerous new and enhanced features and business benefits on their own. However, when both are installed, organizations can realize additional benefits, including more efficient management, greater availability, and faster communication. You can learn more on the Windows Server 2008 and Windows Vista—Better Together page.

Q.  What applications work with Windows Server 2008?

A.  

See a full list of supported Microsoft applications for Windows Server 2008. For third-party solutions, please visit the ISV Solutions Center.

Q.  Are there tools available to assess my infrastructure readiness for Windows Server 2008?

A.  

Yes, the Microsoft Assessment and Planning (MAP) Toolkit will assess readiness for migration to Windows Server 2008.

Q.  Where can I find further information about deploying Windows Server 2008?

A.  

The Windows Server TechCenter provides practical information on evaluating, deploying, and supporting Windows Server 2008.

Q.  How does Windows Server 2008 differ from other operating systems?

A.  

You can find further information on comparing Windows Server with operating systems, such as UNIX, LINUX, and mainframe computers, by visiting the windowsserver/compare site.
 
FAQ
Ubuntu
Written by Administrator   
Tuesday, 26 May 2009 18:07
What is Ubuntu?

Ubuntu is a complete Linux-based operating system containing the very best free and open source software applications you need to work and play. With Ubuntu you can surf the web, read email, create documents, presentations and spreadsheets, edit images and more.

What does "Ubuntu" mean?

Ubuntu is an African word, which has been described as "too beautiful to translate into English". The essence of Ubuntu is that "a person is a person through other people". It describes humanity as "being-with-others" and prescribes what "being-with-others" should be all about. Ubuntu emphasises sharing, consensus, and togetherness. It's a perfect concept for Free Software and open source. Here's a great article that describes Ubuntu, which may help define it. Wikipedia also has a good definition.

How do you pronounce Ubuntu?

Ubuntu, an African word from Zulu and Xhosa, is pronounced "oo-BOON-too".

How much does Ubuntu cost?

Absolutely nothing. Ubuntu is Free Software, giving you rights of Software Freedom, and it really is free of software licensing charges.

Who is Canonical Ltd?

Canonical Ltd is the European-based company that sponsors Ubuntu. Find out more about Canonical.

How does Canonical make money?

Canonical revenues come from its commercial support contracts and engineering services. Canonical offers global, 24x7 support services to customers ranging from Fortune 500 companies to schools and research institutes to governments.

What are the different versions of Ubuntu?

There are several different versions of Ubuntu, some with a different desktop and others for a specific market. Here is some information about them.

Kubuntu is an official derivative of Ubuntu using the KDE environment instead of GNOME. It is part of the Ubuntu project and uses the same underlying system. It is an exciting distribution that showcases the full potential of the KDE desktop. Kubuntu shares the same repositories as Ubuntu, and relies on the same underlying architecture.

Edubuntu is an official derivative of Ubuntu designed for use in classrooms. It contains a large number of educational applications including GCompris, KDE Edutainment Suite, and Schooltool Calendar. Edubuntu is developed in collaboration with teachers and technologists across multiple nations. It enables teachers/lecturers with limited technical knowledge and skills to set up a computer lab, or establish an online learning environment, in an hour or less, and then administer that environment.

Xubuntu is an official derivative of Ubuntu using the Xfce desktop environment. It is intended for users with less-powerful computers, or those that require a highly efficient desktop environment on faster systems. Xubuntu features primarily GNOME applications.

Gobuntu is a derivative of Ubuntu for people who desire a desktop environment that adheres to the Free Software Foundations four freedoms. It excludes binary-only drivers and strives to ensure that no software is included that puts restrictions on distribution of artwork.

How do I get a GNOME, KDE or Xfce desktop?

Ubuntu, Kubuntu, Edubuntu, Xubuntu, and Ubuntu Server all share the base (kernel, low level programme mes). This means you can install any of them on any other.

GNOME

GNOME is the default desktop for Ubuntu. It can also be installed with the ubuntu-desktop package. To learn more about Ubuntu, please see Ubuntu on the desktop.

KDE

KDE is the default desktop for Kubuntu. It can also be installed with the kubuntu-desktop package. To learn more about Kubuntu, please see Kubuntu.

Xfce

Xfce is the default desktop for Xubuntu. It can also be installed with the xubuntu-desktop package.To learn more about Ubuntu, please see Xubuntu.

How often do you issue new releases?

We issue a new release every six months, which is supported for up to 18 months with security patches, fixes for critical bugs, and extra translations

Once I have installed Ubuntu, will I be able to upgrade to the next release?

We fully support upgrades from one release to the next. However, we do not support upgrades that skip a release. Thus we support upgrades from 5.10 to 6.06, but not from 5.04 to 6.06 unless you first upgrade to 5.10.

Note: that this does not necessarily extend to certain situations involving unsupported software, such as packages in the Universe repository, or software which you obtained from a third-party source. Therefore if you install such packages please be aware that you have to track the security implications of it as it is outside of the distribution. To do this you sign up to a security announcement list for the software you run that is not from within your distribution.

Is there a specific Enterprise Release?

In addition to regular releases, the Ubuntu team may make an Enterprise Release, also known as a 'Long Term Support (LTS)' Release, that has received additional stabilisation, polish and translation work. These Enterprise Releases will be supported for a longer period of time than the standard 18 month support of the time-based Releases. Upgrades will be supported from Enterprise Release to Enterprise Release.

What is the Ubuntu Server Edition?

Ubuntu Server Edition is a version of Ubuntu specifically designed for servers and as such includes the bare minimum you need to get your server up and running. Find our more about Ubuntu Server Edition.

How do I get support for Ubuntu?

You can get advice and help on using Ubuntu from the Ubuntu community, or buy professional support from Canonical and a range of local companies.

How do I use and get help about Ubuntu in my own language?

There are a number of international user resources available for Ubuntu. Please check the Local languages page.

Is Ubuntu easy to install?

Ubuntu has a fast and easy graphical installer right on the Desktop CD, which is also a Live CD. On a typical computer, the Ubuntu installation should take less than 25 minutes.

Is Ubuntu easy to install on the server?

Yes. Ubuntu includes a nice, easy text installer, a one click LAMP install option and specialised software for databases, web serving, email hosting and DNS name serving, internet caching and directory services. Ubuntu also includes Samba for Windows file sharing, FTP server software for large file repositories and NTP for network time services. Ubuntu can be installed in a minimal server configuration optimised for data centre servers that will not be used as desktop machines.

What applications does Ubuntu include?

Ubuntu includes a full range of desktop and server applications. When you install Ubuntu you have software for most computing needs, from complex programming to business presentations and databases.

Ubuntu is a complete desktop operating system and application set. It includes everything you need to gain computer literacy skills, and to become proficient in the use of computers for home, business and professional purposes. Ubuntu is an excellent platform for education, there are no limits to the amount that students can learn about their software.

What about applications for business users?

When you install Ubuntu, you get business software that handles word processing to create letters and documents, spreadsheet software for business analysis and calculation, and presentation software that lets you get your point across clearly in a business meeting. This software, called OpenOffice, is compatible with Microsoft Office, so you can easily exchange documents with friends and colleagues who use Windows and Microsoft Office.

Ubuntu also includes a world class internet browser (Firefox) which is fast and secure, and which has many features to improve your web surfing experience. For example, tabbed browsing lets you open many web pages in the same window and switch quickly between them, and popup blocking means that you determine which sites are allowed to create new popup windows and adverts. Ubuntu has an excellent email and calendar application (Evolution) which sets the pace in the email world in terms of searching and organising your mail.

Is there a specific version of Ubuntu for use in schools?

If you are looking to gain basic computer literacy, Ubuntu includes applications that cover every area of computer use from the straightforward (typing, word processing) to the specialist (graphic design and desktop publishing). It is also an excellent platform for students studying information technology and computer science, as it includes all the tools you need to become a world-class software developer. What's more, Ubuntu is available in many languages which makes it appealing to new users who prefer to learn in their local language. We also have a specific version developed especially for schools called Edubuntu.

How much software is available for Ubuntu?

About 1,000 pieces of software are installed by default, out of the basic fully supported software list of 1,300 packages. In addition to that, there are more than 16,000 packages which are available to you immediately, and more software is available from third parties. You can read about the complete Ubuntu software repository and its structure here.

How is Ubuntu developed?

Ubuntu is community developed. You can interact with the Ubuntu community including developers, translators and technical support activists through our mailing lists and IRC channels:

Ubuntu Mailing Lists

There are several mailing lists that you can join. Some of these receive very high traffic so you may prefer to use a web forum.
Ubuntu IRC Channel.
Chat live with the Ubuntu community on Internet Relay Chat (IRC) at #ubuntu on irc.freenode.net.
Web Forums

Find out more about web forums in which to meet Ubuntu users and developers.
What is the current stable release?

The current stable release can be found at www.ubuntu.com/getubuntu/download

What is the current Long Term Support release?

The current Long Term Support Release is 8.04 LTS, sometimes referred to by its development name of Hardy Heron. The previous LTS, 6.06 LTS, is still supported.

What is the current development version?

The current development version can be found at www.ubuntu.com/testing

How does the numbering system work?

The version number comes from the year and month of the release, it really is that simple.

The first release (Warty Warthog) was released in October 2004, release number 4.10.
The second release (Hoary Hedgehog) was released in April 2005, release number 5.04.
The third release (Breezy Badger) was released in October 2005, release number 5.10.
The fourth release (Dapper Drake) was released in June 2006, release number 6.06 LTS
The fifth release (Edgy Eft) was released in October 2006, release number 6.10.
The sixth release (Feisty Fawn) was released in April 2007, release number 7.04.
The seventh release (Gutsy Gibbon) was released in October 2007, release number 7.10.
The eighth release (Hardy Heron) was released in April 2008, release number 8.04 LTS.
What does releasename+1 mean?

If you see a name such as current development_name +1 what is being referenced is the version after the current development name, and the reason for the +1 is that the version after next has not got a name yet.

What do these funny names like Dapper mean?

We name all of our development releases with catchy animal names. This started with the early days of Ubuntu, before it was called Ubuntu, when Robert Collins, upon hearing of the six month release schedule, said "That is going to be pretty warty. Lets call it Warty Warthog". The naming convention stuck. Here is a quick table to help you:

Release Name

Release Number

Warty Warthog

4.10

Hoary Hedgehog

5.04

Breezy Badger

5.10

Dapper Drake

6.06

Edgy Eft

6.10

Feisty Fawn

7.04

Gutsy Gibbon
7.10
 Hardy Heron
8.04 
Note: The official way to refer to a released version of Ubuntu is by the number, not the name. Thus the current version of Ubuntu is 8.04, not Hardy Heron. The transition from being known by a code name to being known by a release number occurs when the Beta release happens. At that point the code name is obsolete

How do I become part of the community?

If you run Ubuntu, you already are. If you want to help out, please see the Get Involved page. You will find information about beta testing, and other ways to help Ubuntu even if you are not a programmer.
 
FAQ
Fedora
Written by Administrator   
Tuesday, 26 May 2009 18:05
Getting Started


Why should I be using Fedora?
You should be using Fedora because it includes the best, latest, and most robust collection of free and open source software available. The Overview details many of Fedora's strengths:


Where can I get Fedora? Can I redistribute Fedora or make derivatives from it?
You can download, use and redestribute Fedora and we strongly encourage you to do so. The Free and open source licenses (such as the GPL) governing the source code allow you to redistribute or modify Fedora but any use must comply with the Fedora Trademark Guidelines . Details are available at

Distribution

Is my hardware compatible with Fedora?
Linux is able to support every class of component and peripheral. Fedora includes all of the drivers provided by the projects that are responsible for Linux hardware support. The Fedora installation process automatically detects the supported hardware on your computer.

Some specific models of hardware are not yet supported under Linux, or require proprietary drivers from the manufacturer. If Fedora does not automatically detect a device, you may need to install additional drivers or firmware.


Network Connections 
Modems and wireless network connections require additional configuration after the installation process completes. Refer to the question on network connections for more information.
The following websites provide more detailed information on Linux support for various types of hardware:

Graphics adapters - http://wiki.x.org/wiki/FAQ
Audio adapters - http://www.alsa-project.org/
Printers - http://www.linuxprinting.org/
Digital cameras - http://www.gphoto.org/
Scanners and imaging devices - http://www.sane-project.org/
Modems - http://linmodems.org/
PCMCIA cards - http://prism54.org/newdrivers.html, http://rt2x00.serialmonkey.com/wiki/index.php/Hardware, http://ralink.rapla.net/, http://zd1211.ath.cx/
The Fedora Release Notes document known issues with specific device models:

http://docs.fedoraproject.org/release-notes/
For more information on the Fedora hardware policy, refer to the question on hardware certification .


How can I install Fedora?
Fedora provides a very user-friendly installation system, with both graphical and text interfaces. Read the Fedora Installation Guide for step by step details:

http://docs.fedoraproject.org/install-guide/
What are the differences between Live CD/DVD images and regular installation images ?
Live images provide a subset of packages available in the regular CD/DVD images. Both connect to the same repository that has all the packages.
Live image installations do not allow any package selection or upgrade capability since they copy entire the filesystem from media to hard disk or USB disks. After the installation is complete and booted into, packages can be added and removed as desired with PackageKit or yum.
Live images do not work on i586 architecture and requires i686 arch at minimum

What is the difference between Fedora and Red Hat Enterprise Linux ?
Fedora has the latest and greatest software and new releases every six months. Fedora is the upstream of Red Hat Enterprise Linux (RHEL). RHEL has a conservative release and update cycle and is commercially supported by Red Hat.

Refer Red Hat Enterprise Linux for more details.


Using Fedora


How do I configure network connections? How does Fedora support wireless connections?
By default, Fedora configures the network cards on your computer to automatically obtain the correct network settings with DHCP. If your computer connects to a wired network or DSL router, no further configuration is required.

For other types of connection, you can use Network Manager which is installed and enabled by default in Fedora. This new system provides automatic networking and wireless configuration, as well as an interface for VPN connections. Laptops may switch seamlessly between networks with NetworkManager.

Fedora also provides the system-config-network utility, which allows you to manually configure most networking options. To run system-config-network, choose System > Administration > Network.


How do I install new software on Fedora? Is there anything like APT?
The yum utility helps you manage the software on your system. The yum utility accesses Web sites, known as repositories, to download and install the latest versions of software packages. Fedora systems also include a graphical interface to yum, which appears on the Main Menu under Applications > Add/Remove Software.

Fedora currently includes over 12,000 packages.

Refer to this page for more information on yum:

Tools/yum
Apt is also in Fedora repository but not as the default package manager. See the APT page for details:

Tools/Apt

How do I keep Fedora systems updated?
Fedora includes PackageKit that provides desktop notifications to automatically inform you whenever updates are available. To perform a system update manually on Fedora, select System > Administration > Update System. This utility updates all of your system's software that is provided by yum repositories.

To start a full system update from the command-line, enter the following at the prompt:

su -c 'yum update'
Enter the root password when prompted.


Can Fedora update itself automatically?
Yes, although automatic updates may not be appropriate for all systems. Refer to AutoUpdates for more details on whether and how to use this feature on your Fedora system. You can use set the preferences in System > Preferences > System > Software Updates.


How can I get notices of new software releases?
Fedora includes PackageKit to automatically inform you whenever updates are available. To receive notification of new and updated software as it is made available, you may subscribe to either the announcements mailing list, or the RSS feeds:

Fedora Project package announcements mailing list : https://www.redhat.com/mailman/listinfo/fedora-package-announce-list
Fedora Project RSS feeds: http://fedoraproject.org/infofeed/
Other major announcements can be received by subscribing to the Fedora Project announcements mailing list

Fedora Project announcements mailing list: https://www.redhat.com/mailman/listinfo/fedora-announce-list

Does Yum or Add/Remove programs (PackageKit) support installing from CD/DVD media?
Support for this is work in progress in PackageKit. Refer to the PackageKit FAQ for more details. For using media as a yum repository, refer to http://www.city-fan.org/tips/SubsetRepositories.


Why doesn't Fedora include support for proprietary formats like MP3 or MPEG?
The MP3 and MPEG formats are covered by patents, and the patent owners have not released the technologies under licenses which are compatible with Fedora's requirements.

Fedora only supports and includes free and open source software. Technologies under stringent copyright or patent restrictions are not included in Fedora. For more information about multimedia support in Fedora, including more about MP3 and MPEG support, see the Multimedia section:


Why doesn't Fedora include DVD video playback support?
The DVD video formats are covered by patents, and the patent owners have not released the technologies under licenses which are compatible with Fedora's requirements. Many DVD videos also use a copy protection technology, and the code necessary to play those videos may violate the Digital Millennium Copyright Act (DMCA), a copyright law of the United States.

Fedora only supports and includes free and open source software. Technologies under stringent copyright or patent restrictions are not included in Fedora. For more information about multimedia support in Fedora, including more about DVD video support, see the Multimedia section:


Why doesn't Fedora include proprietary software like Adobe's Acrobat Reader, Adobe's Flash Player, or RealPlayer?
Fedora only supports and includes free and open source software. No proprietary programs are included in Fedora. Many of these programs are available for Fedora, and you are free to obtain them from another vendor. For more information, see the ForbiddenItems page:


Does Fedora include Java?
Yes. Fedora includes OpenJDK which is Sun Java under a free and open source license. Please refer to our JavaFAQ page for information regarding Java and Fedora:


What is SELinux, and where can I read more about it?
Fedora is the first mainstream operating system in the world to provide a Mandatory Access Control (MAC) security system by default, using the SELinux framework. The SELinux configuration in Fedora provides enhanced security by restricting the privileges of processes running on a Fedora system. These restrictions drastically reduce the impact of security vulnerabilities, since services have only limited access to the rest of the system. SELinux in Fedora also has a 'strict' policy, which is useful for very security-sensitive environments. There are other security systems enabled through the SELinux framework, such as MLS, MCS and RBAC.

Refer to the following document for more information on the SELinux implementation in Fedora:

SELinux

What is Virtualization? Where can I learn about using it?
Fedora includes extensive support for virtualization. This enables multiple operating systems to run simultaneously on the same machine with little reduction in overall performance. Each operating system is allocated some of the resources of the host computer. Administrators may also move a running operating system between machines without disrupting or shutting down services.

The Virtualization page can help you get started.


When is the next release of Fedora? What is the release schedule?
See the Fedora Project Releases Schedule page.


How long is each release of Fedora maintained?
Fedora Project maintains any particular release of Fedora for a month after two subsequent releases. The Fedora release lifecycle is explained in more detail:

LifeCycle

Where can I find information on Fedora security updates?
See Fedora Security Advisories page.


What is the errata or updates policy for The Fedora Project?
Security updates, bugfix updates, and new feature updates will all be available, through Red Hat and third parties. Updates may be staged (first made available for public qualification, then later for general consumption) when appropriate. In drastic cases, we may remove a package from The Fedora Project if we judge that a necessary security update is too problematic/disruptive to the larger goals of the project. Availability of updates should not be misconstrued as support for anything other than continued development and innovation of the code base. Some updates that are too disruptive to include in a general release will be made available only in the development branch and included in the subsequent general release. Merely continuing to update won't lead to a next release and you need to explicitly do a distribution upgrade if desired. Updates are available for every release for the period denoted in the LifeCycle page.

Red Hat will not be providing an SLA (Service Level Agreement) for resolution times for updates for The Fedora Project. Security updates will take priority. For packages maintained by external parties, Red Hat may respond to security holes by deprecating packages if the external maintainers do not provide updates in a reasonable time. Users who want support, or maintenance according to an SLA, may purchase the appropriate Red Hat Enterprise Linux product for their use.


I have a pre-release version of Fedora. Can I upgrade to the final release?
Yes. Refer to Upgrading from pre-release to final for details.


I have an older Fedora release. Can I upgrade my existing installation?
Yes. For more information on upgrading options, refer to the DistributionUpgrades page:


Help


Where can I find help?
You can find documentation and get help through forums, IRC, or mailing lists from others in the Fedora community. See the Communicate page for more information:

Please do not contact Fedora developers directly, or use the special developer channels, for end-user support. The developers are very busy writing and maintaining Fedora software and do not have much spare time for these issues.


I hear all of these terms that are unfamiliar, what do they mean?
For definitions to many of the most common terms, refer to the Glossary .


Where can I report bugs or request features for software packages existing in Fedora?
Refer to the BugsAndFeatureRequests page for guidance on this.


Where I can learn more about security features and status in Fedora? How do I report a security bug?
Refer to the Security page for all of this information.


I'm experiencing a problem, and I think it might be my hardware. Where should I look?
Check the HardwareProblems page before posting bugs that might be known hardware problems.


Where can I request a newer version of a package in Fedora?
File a request in http://bugzilla.redhat.com against the particular package you would like to have a update. Providing more details on why you want that particular update would be useful information for the package maintainers.



I have a question that isn't in this list. Where else can I find help?
See the links for Fedora Resources at the bottom of this page.


Can I donate to the Fedora Project?
Yes, you can donate your time to Fedora Project by contributing to Fedora, free and open source software. You can also donate money but that requires a bit more creativity! Refer Contribute more details.


About Fedora


What is Fedora?
Fedora is a Linux-based operating system that showcases the latest in free and open source software. Fedora is always free for anyone to use, modify, and distribute. It is built by people across the globe who work together as a community: the Fedora Project. The Fedora Project is open and anyone is welcome to join. The Fedora Project is out front for you, leading the advancement of free, open software and content.

Refer also to the Overview page.


What are the objectives of Fedora?
Objectives

Why a project instead of a product?
A global steering committee at Red Hat decided that Red Hat Linux was suffering from too many compromises as a retail product, and that the company should redirect efforts toward creating a community-based project. Rather than being subject to retail product delivery schedules, Fedora is released on schedules set by a decision-making process that is open, and influenced by the community.

Projects

What are the primary benefits of this change?
Changing the product to a project will:

Ensure that users can get the latest bits as quickly as possible.
Create new opportunities for developers and users to participate in The Fedora Project development by opening up the full development process for anyone to see and join if they'd like.
Allow us to use The Fedora Project to develop and mature the latest, greatest technologies.
Speed up the development process, taking better advantage of the inherent strengths of the open source model.

Will Red Hat provide formal technical support for The Fedora Project?
No, no formal Web or phone support for The Fedora Project will be available from Red Hat. Red Hat's supported product line will be based in part on Fedora, and our development will be done externally as part of The Fedora Project as much as possible. Each new release of our supported products will be based in part on a recent release of Fedora.


How will The Fedora Project be made available to the public?
Fedora releases will be available as ISO images for both CDs and DVDs, and will also be available through other channels such as third-party online sales of physical media; distribution at Linux User Groups, included in magazines and in books, and maybe even handed out at trade shows. The bits may be actively pushed into content sharing networks such as BitTorrent. (Not all mechanisms will be used for each release, except that ISOs will be freely available for each release.)


Will Fedora be sold in retail?
Fedora will not be sold through the retail channel as a shrinkwrapped box. There is no list price for Fedora. The rapid development pace we expect for Fedora doesn't suit retail distribution — it is a lot of work to get a box product in and out of the channel, and retail isn't set up to efficiently handle software that is updated as often as every six months. Also, the creation of packaging and other materials that are necessary for retail significantly slows down the time to market, which means that users can't get the freshest bits when they are still truly fresh. Further information on Red Hat's retail product line is available at the Red Hat website.


What is the difference between "Fedora distribution", "The Fedora Project", and "Fedora"?
The Fedora Project is a collection of sub-projects. The Fedora distribution is the central project, which aims to provide a platform with the best in free and open source software. Fedora generally refers to the Fedora Project as a whole, and is sometimes used to refer to Fedora or a system running a collection of software from the Fedora Project.


Whom can I contact in the individual Fedora sub-projects?
Try the project's mailing list first, which gives the project leads and other community members the chance to help you. You can find information for the various projects on the Communicate page.


How is the Fedora Project organized and governed?
The Fedora Project is managed by a board of community members and Red Hat employees, with Red Hat providing significant funding and other services such as bandwidth and hosting, broad direction, engineering, and marketing.

The Fedora Project is a collection of many smaller projects , working together to produce the platform and build the supporting community. These different sub-projects are independent of one another, but work together to achieve common goals and coordinate efforts.

Each of the sub-projects has leads or a Steering Committee to organize and guide that project's development. The Fedora Project operates as a meritocracy , where responsibility and power are granted based upon ability and effort. The people who lead Fedora are selected because they have proven they are willing and able to do so.

Board

What kind of project management method does each Fedora sub-project use?
Each project has either leads or a Steering Committee to guide it. Individual contributors are given a great deal of freedom to work on whatever they choose, but they are asked to follow the guidance from the project's committee for processes and approval for new initiatives.

Like other responsibilities in the Fedora Project, committee membership is based largely upon merit, but all voices are welcome, and new ideas and opinions will be given due attention. Innovating and leading new ideas is a great way to earn recognition within the community.

Contributors can join committee members in regular IRC meetings. The meetings are open, and minutes are made publicly available and usually posted to the appropriate mailing list. Raw IRC logs are also sometimes available.

Most sub-projects keep a schedule of tasks on this wiki. Check the Projects page for links to individual sub-project pages. From those individual pages, you can find all of the available information for that project.


Does the Fedora Project assign tasks to contributors, or do the contributors decide what to do?
Interested volunteers are encouraged to take up the tasks they would like to contribute towards. You can avoid redundant tasks by posting to the relevant project list and coordinating with other interested community members. If you're not sure where you want to contribute, see the join page for different areas that can use your help. The Fedora Mentors project can guide you if you need further help.

Join

Is there a partnership program between schools or non-profits and Fedora?
Not at present. If you have any ideas or suggestions to create such a program, please bring it to the attention of Fedora Marketing . Interested schools and non-profits are welcome to join us for discussions.


Is there a partnership program between LUGs and Fedora?
We attempt to work with Linux User Groups in whatever ways we can. Our list of LUG contacts is on our LinuxUserGroups page. If you would like to represent your LUG, please add your LUG to that list. We also encourage our Ambassadors to engage their local LUGs.


Can schools and non-profits reference the "Fedora Project" name and other Fedora marks if they are interacting with the Fedora community?
Yes, as long as they make it clear whether or not they are representing the Project. If they would like to represent the Project, they can approach and coordinate with the Fedora Marketing team. This and other uses of Fedora marks are subject to the terms of the Trademark Guidelines .


Is there a certification program for third-party applications running on Fedora?
No. The Fedora Project is dedicated to providing the best in free and open source software. Fedora leads in open solutions, and is developed with a rapid release cycle. Fedora Package Collection allows a vast array of additional Free and open source solutions to be contributed by the community and maintained for Fedora. Beyond these projects, the Fedora Project does not certify any third-party applications.

Formal ISV certification is available for Red Hat Enterprise Linux, which shares many of Fedora's features, but is provided on a longer release cycle and is commercially supported for 7 years.



Is there a certification program for hardware that works with Fedora?
Fedora runs on a large variety of hardware, and the list of working hardware is constantly growing larger. Because Fedora improvements occur very rapidly and consistently, including hardware support, a Hardware Compatibility List was deemed too time-consuming and not worthwhile. Alternative methods of tracking working hardware have been suggested, but the consensus is that manually maintaining a complete list is unfeasible.

We are collecting hardware information directly from the users anonymously in a opt-in method, through the smolt project. We are always trying to find ways to improve Fedora's hardware support, and welcome constructive feedback.

http://smolt.fedoraproject.org/
https://fedorahosted.org/smolt
A compatibility list is maintained for Red Hat Enterprise Linux at http://bugzilla.redhat.com/hcl. It will closely parallel Fedora's compatibility.


Is the Fedora Project independent of Red Hat, Inc.?
The Fedora Project is a community project, separate from Red Hat, but Red Hat sponsors the Fedora Project and provides a great deal of valuable management and resources to the Fedora Project. Red Hat uses the material that the Fedora Project produces to develop its enterprise platform offerings. Red Hat has a strong interest in Fedora, and the success of the Fedora Project has been thanks to the great contributions of Red Hat.


What is the relationship between Fedora and Red Hat Enterprise Linux?
Permalink

Fedora is upstream and forms the base of Red Hat Enterprise Linux. Refer to the following link for additional details:

RHEL

For Fedora Contributors


Why should I help?
Your name in lights, an online CV, and maybe a trip to a FUDCon.

First, contribute to Fedora and you may get your name in the distribution. Hey, fair is fair.

Second, if you're a Fedora contributor, you don't need a fancy resume; you can just tell potential employers to 'Google' your name.

Third, top Fedora contributors can receive travel stipends to attend the Fedora Users and Developers Conference nearest them. You will have the opportunity to meet some of the giants of the open source movement in person, as their peers and equals.

And last, you'd be playing with this stuff anyway. Spend your time doing stuff that you will enjoy and that others will use. What more incentive do you need? Join us.


I'm interested in contributing to Fedora, where can I get started?
Refer to our join page to learn where help is needed and how to get going. You might also be interested in our Mentors program.


What are some interesting new project ideas that are important to Fedora?
See the FedoraBounties page for project ideas important to Fedora.


How can I package software for Fedora users? Where can I find information for contributing to Fedora Package Collection?
The Package Maintainers category will point you to all kinds of help.


Where can I find information for contributing to the Fedora Documentation Project?
Some good links for help can be found on the DocsProject page.


Where else can I find answers?

Release Notes - You should always read the release notes for the versions of Fedora you use.
Red Hat's Bugzilla - Search for information about your problem here
Fedora Documentation - Several helpful documents are published here.
Red Hat Magazine - Red Hat online magazine is a free resource that provides various informative articles on Fedora.
See Fedora Community Websites for more Fedora Resources.
Last Updated on Tuesday, 26 May 2009 18:08
 
FAQ
CentOS
Written by Administrator   
Tuesday, 26 May 2009 17:58
1. Why does CentOS exist?

CentOS exists to provide a free enterprise class computing platform to anyone who wishes to use it. CentOS 2, 3, 4 and 5 are built from publicly available open source SRPMS provided by a prominent North American Enterprise Linux vendor. CentOS conforms fully with the upstream vendors redistribution policies and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.). CentOS is designed for people who need an enterprise class OS without the cost or support of the prominent North American Enterprise Linux vendor. Neither the CentOS Project (we who build CentOS) nor any version of CentOS is affiliated with, produced by, or supported by the prominent North American Enterprise Linux vendor. Neither does our software contain the upstream vendor's product ... although it is built from the same open source SRPMS as the upstream enterprise products.

2. How long after Red Hat publishes a fix does it take for CentOS to publish a fix?

Our goal is to have individual RPM packages available on the mirrors within 72 hours of their release, and normally they are available within 24 hours. Occasionally packages are delayed for various reasons. On rare occasions packages may be built and pushed to the mirrors but not available via yum. (This is because yum-arch has not been run on the master mirror. This may happen when issues with upstream packages are discovered shortly after their release, and if releasing the package would break it's functionality.)

Update Sets (see this FAQ) will have Security Errata released was stated above, while the BugFix and Enhancement errata are actually tested more rigorously and released after the new ISO for the Update Set is produced. This will normally be within 2 weeks of the Update Set release.

3. How do I get Updates?

CentOS ships with an application called yum that serves as our recommended tool for performing updates and package installation. Please see this guide for Managing software with Yum

A version of up2date is also provided that does not connect to the upstream vendor, but instead connects to the CentOS Network (CN) for updates. CentOS has made a decision to NOT automatically load our RPM-GPG-KEY for CentOS-3, but to allow users to first verify the key and then install it. This will prevent people from modifying our key and installing modified software. In CentOS 4, yum will import the key, but only after the user sees the key and can verify it is authentic.

There is a separate FAQ question concerning how to import the CentOS RPM signature key.

Note on using yum (with CentOS-2 and CentOS-3), the first time you run yum, you may download a large number of header files (100's). These are generally very small files. Yum uses the header files to determine dependencies, packages available for install, etc. Do not be alarmed when this initial download occurs. yum is NOT downloading the packages. After the first update, you will only download new headers. (Note, with CentOS-4 we use a newer version of yum, so there is a new metadata system that has the hdr files compressed in a single file ...)

4. Many RPMs still contain the name redhat, rhel, or rh. Shouldn't these be changed?

This question has an answer on its own page: CentOS Goals.

Additional Text by JohnnyHughes:

The upstream vendor is using open source (mostly GPL) software in their business model. They take software that other people write (Gnome.org, X.org, KDE.org, OpenOffice.org to name a few). They repackage the source files into RPM format for redistribution. Because they chose an open source model to obtain the software they distribute, they must provide their source code to others. That is how the GPL works. The upstream vendor provides much added value by creating the Source RPMS and distributing them. They also fix problems in software and provide feedback to the software developers ... this is what makes open source software work. The CentOS Project takes the publicly available source packages (SRPMS) provided by the upstream vendor and creates binary (installable) packages for use by anyone who wants to use it. Some packages contain Trademark information and the upstream vendor has specifically created a guide to redistribute software built from their
publicly available sources. You can read about it here. We support the upstream vendors Trademark rights and strive to be in full compliance with those guide lines. The CentOS project is not interested in taking credit for work done by others, so where possible we will leave all vendor file names as they are. If we must make any changes to a package (due to trademark restrictions, to setup a configuration file, etc.), it will have a .centosx in the filename (the x is the CentOS version ... 3 for CentOS-3.x, 4 for CentOS-4.x, etc.) As do most of the other rebuild projects, we change the kernel SRPM and do not label it .centosx. This is because the kernel needs to be exactly the same name to allow 3rd party modules to function.
I would like to thank the upstream vendor for making the SRPMS available in the manner that they do. There are several other enterprise vendors who do not make their source as readily available. Their product is excellent (or we would not rebuild it as CentOS), as is their support. If you need the support services that they provide, we highly recommend their enterprise product I would also like to make sure there is no confusion concerning the CentOS Project and the upstream vendor. The CentOS Project is not supported by or affiliated with the upstream vendor in any way. The upstream vendor does not recommend or support any of our offerings in any way.
5. Does CentOS change the upstream Source RPMs?

No. CentOS' key mandate for our base and updates repositories is NOT extending or enhancing packages or features beyond those supplied by the upstream Source RPM's. CentOS strives intentionally to be a simple binary-functional clone for our users. CentOS does offer other (optional) repositories called extras, addons, contribs, and centosplus that do offer added functionality. There is a Wiki page about the various CentOS repositories and their purposes.

6. Is there a Contrib area?

Yes. Please see the Wiki page on Contributing to the CentOS project

7. What is CentOS's relationship with Red Hat®, Inc. or RHEL?

There is none, nada, zip, zero. CentOS-x is NOT a Red Hat®, Inc. or Fedora™ Core affiliated product or project.

The CentOS Project is not affiliated with or supported by Red Hat®, Inc or the Fedora™ Project.

CentOS-x is NOT supported in any way by Red Hat®, Inc. or the Fedora™ Project.

CentOS-x is NOT Red Hat® Linux, it is NOT Fedora™ Core. It is NOT Red Hat® Enterprise Linux. It is NOT RHEL. CentOS-x does NOT contain Red Hat® Linux, Fedora™ Core, or Red Hat® Enterprise Linux.

CentOS is built from publicly available open source SRPMS. See About CentOS if you have any questions.

8. Where can I get package XyZ.rpm for CentOS?

The Wiki has a page about the CentOS and other ''friendly'' repositories. Chances are good that one of those repositories has the package you are looking for.

9. What architectures are supported?

The following architectures are supported by each version of CentOS:

CentOS 2 only supports x86.

CentOS 3 currently supports x86, x86_64 (AMD64 and Intel EM64T), s390, s390x, ia64 (Intel Itanium2).

CentOS 4 currently supports x86, x86_64, s390, s390x and ia64. ppc (PowerPC), alpha (DEC Alpha) and sparc are released in beta for CentOS 4.

CentOS 5 currently supports x86 and x86_64. ia64, ppc (PowerPC) and sparc are being developed.

10. Why does YUM complain about missing a GPG key under CentOS? or I just installed CentOS and yum keeps reporting that the correct GPG key is not installed. How do I install it?

These are answered in the CentOS 3, the CentOS 4 and the CentOS 5 sections of the FAQ.

11. The upstream provider offers Enterprise Linux in several flavors, AS, ES, WS, PWS, etc. Which one is CentOS like?

CentOS is built from the the publicly provided AS Enterprise Sources, although all of the above versions are built from the same sources. AS is either a larger subset of packages (than PWS and WS) or has advanced Kernel parameters supporting larger number of processors or memory (as compared to ES).

With the upstream provider, AS supports some IBM architectures not supported by the other versions (ES, PWS, WS). CentOS is built like the AS version.

Consult: What release am I running?

12. How can I easily compare what major package versions are in CentOS 2, CentOS 3, CentOS 4 and CentOS 5?

On the CentOS Distro Page at DistroWatch.com you can compare Major packages (currently 54) and All tracked packages (currently 177). DistroWatch is an great resource for comparing Linux and BSD distributions.

13. What are all the CentOS repositories (directories) and what is each one for?

addons
Contains packages required in order to build the main Distribution or packages produced by SRPMS built in the main Distribution, but not included in the main Red Hat package tree (mysql-server in CentOS-3.x falls into this category). Packages contained in the addons repository should be considered essentially a part of the core distribution, but may not be in the main Red Hat Package tree.
apt
(CentOS-4 only) Contains all the apt RPMS for the CentOS site. This is where you would point if you want to use apt to do updates. Apt has issues with distros that use multiple libraries, so is only available for the i386 distro.
centosplus
Packages contributed by CentOS Developers and the Users. These packages might replace rpm's included in the core Distribution. You should understand the implications of enabling and using packages from this repository.
contrib
Packages contributed by the CentOS Users, which do not overlap with any of the core Distribution packages. These packages have not been tested by the CentOS developers, and may not track upstream version releases very closely.
docs
Contains manuals and release notes for CentOS
extras
Packages built and maintained by the CentOS developers, that add functionality to the core distribution. These packages have undergone some basic testing, should track upstream release versions fairly closely and will never replace any core distribution package.
isos
Contains the ISOs for download. On the main CentOS mirror sites ISOs can not be downloaded directly, but we provide a Bittorent file for downloading. On external public mirrors, ISOs may or may not be directly downloadable (at the discretion of the mirror owner).
os
Contains the base OS tree that is on the Main ISO files.
updates
Contains updates released for the CentOS distro.
debuginfo
Contains RPMs with debugging symbols generated when the primary packages are built. No repo config is provided. These packages are found at http://debuginfo.centos.org/

testing
This repository is a proving grounds for packages potentially on their way to CentOSPlus and CentOS Extras. They may or may not replace core CentOS packages, and are not guaranteed to function properly. These packages build and install, but are waiting for feedback from testers as to functionality and stability. Packages in this repository will come and go during the development period, so it should not be left enabled or used on production systems without due consideration. No repo config is provided by default. CentOS-Testing.repo can be put in /etc/yum.repos.d. Contribute to CentOS by reporting problems or successes on the CentOS Developer's list. Use with caution.

See the Repositories page for more information.

14. What is the versioning/release scheme of CentOS and how does it compare to the upstream vendor?

The upstream vendor has released 4 versions of enterprise Linux that CentOS rebuilds the freely available SRPMS for (see About CentOS for the details). So, the major CentOS releases are CentOS 2, CentOS 3, CentOS 4 and CentOS 5. The upstream vendor releases security updates as required by circumstances. CentOS releases rebuilds of security updates as soon as possible. Usually within 24 hours (our stated goal is with 72 hours, but we are usually much faster).

The upstream vendor also releases numbered update sets for Version 3, Version 4 and Version 5 of their product (Currently EL 3 update 9, EL 4 update 6 and EL 5 update 1) 2 to 4 times per year. There are new ISOs from the upstream vendor provided for these update sets. Update sets will be completed as soon as possible after the vendor releases their version ... generally within 2 weeks. CentOS follows these conventions as well, so CentOS 3.9 correlates with EL 3 update 9 and CentOS 4.6 correlates with EL 4 update 6, CentOS 5.1 correlates to EL 5 update 1, etc.

One thing some people have problems understanding is that if you have any CentOS-3 product and update it, you will be updated to the latest CentOS-3.x version.

The same is true for CentOS-4 and CentOS 5. If you update any CentOS-4 product, you will be updated to the latest CentOS-4.x version, or to the latest CentOS 5.x version if you are updating a CentOS 5 system. This is exactly the same behavior as the upstream product. Let's assume that the latest EL4 product is update 6. If you install the upstream original EL4 CDs (the ones before any update set) and upgrade via their up2date, you will have latest update set installed (EL4 update 6 in our example). Since all updates within a major release (CentOS 2, CentOS 3, CentOS 4, CentOS 5) always upgrade to the latest version when updates are performed (thus mimicking upstream behavior), only the latest version is maintained in each main tree on the CentOS mirrors.

There is a CentOS Vault containing old CentOS trees. This vault is a picture of the older tree when it was removed from the main tree, and does not receive updates. It should only be used for reference.

15. How do I download and burn the CentOS isos?

You can download the latest CentOS ISOs from here: CentOS Downloads

After you download the ISOs, you should check the MD5 sums of the ISO file(s) that you downloaded against the published md5sum list in the ISO directory. If the md5sum values match, the download is good ... if they do not match, the file was not downloaded correctly, and you need to get the file over again. Bittorrent downloads are best, because they do an MD5sum check as part of the download process.

Once you have verified the md5sum of the ISO, you know you have a good download. Now you can burn the ISO to a disk. If you have k3b (CentOS-4 users do, all other CentOS users do not by default) I recommend you use it. You want to use the Tools -> CD -> Burn CD Image or Tools -> DVD -> Burn DVD ISO Image option to write the ISO file to a CD/DVD.

More information on how to verify and burn a CD ISO image can be found at http://www.centos.org/docs/5/html/CD_burning_howto.html.

Once the CD is burned, you should be able to boot from it. The last check you need to do is to verify the media. This will verify that the writing of the ISO to your media happened correctly. There will be a Check Media option after you select your keyboard and language.

If your media passes this check (make sure to check each disc for multiple media sets), you have a fully working installable media. If it fails this check, but passed the md5 check above, then the problem is with the burned media. Try burning on new media at a slower speed, if possible.

All CentOS ISOs that we release have been checked, so if the MD5 sums that you have match, the ISOs should burn clean and pass the media checks. If they do not, the problem is almost always a bad media write to CD/DVD.

If you would rather buy your CentOS ISOs already burned, please see our official CentOS CD/DVD Vendors page. These official CentOS vendors donate a portion of each CD/DVD sale directly to the CentOS Project. You get a tested ISO ready to use ... we get money ... does it get any better than that

16. Can I add X to my server after install? or I installed from the Server ISO and it didn't install X, how do I install X?

The easiest way to install X (and a GUI system) is to use the `yum groupinstall` feature. First you can see all the yum groups available with the command: yum grouplist You can install X and Gnome or KDE like this: yum groupinstall "X Window System" "GNOME Desktop Environment" or yum groupinstall "X Window System" "KDE (K Desktop Environment)" You may also want to add some other groups from the list like `"Graphical Internet" or "Office/Productivity"`

Note: If you are running CentOS 5, yum groupinstall "GNOME Desktop Environment" may complain about a missing libgaim.so.0. This is a known bug. Please see CentOS-5 FAQ for details.

17. What are the Maximum number CPUs, Maximum filesystem size, Minimum / Maximum Memory and other specifications associated with the different CentOS versions?

See this page: CentOS Product Page

18. There is no mp3 support in CentOS! Or is there? How about other multimedia formats?

Yes. There is no mp3 support in CentOS, as there is no mp3 support in the distributions from upstream. It's not included because of legal (patent) issues. You either can encode your music files to ogg vorbis, which is supported in CentOS or install mp3 support from a third party repository, namely rpmforge. For example: If you want mp3 support for xmms, then install xmms-mp3 from that repository.

The same is true for several other multimedia formats (codecs, for example gstreamer plugins) and multimedia players like xine or mplayer. These aren't packaged with CentOS because of legal issues, but you may find those in the rpmforge repository.

19. What is the support ''end of life'' for each CentOS release?

CentOS 2
CentOS-2 updates until May 31 2009
CentOS 3
CentOS-3 updates until Oct 31, 2010
CentOS 4
CentOS-4 updates until Feb 29, 2012
CentOS 5
CentOS-5 updates until Mar 31, 2014
20. Where can I get the latest version of XyZ.rpm for CentOS? I cannot find it anywhere.

CentOS is an Enterprise-class operating system and as such is more about stability and long-term support than cutting edge. Major package versions are retained throughout the life cycle of the product. This is generally what Enterprise wants and affords developers a stable base on which to develop without fear that bespoke applications will break every time something gets upgraded to the latest and greatest, but ultimately buggy version or the API changes breaking backwards compatibility.

So no, you will generally NOT find the very latest versions of various packages included in an Enterprise-class operating system such as CentOS. It's a feature not a deficiency.

Security patches and bug fixes are backported into the shipped version. See here for details: http://www.redhat.com/advice/speaks_backport.html
 
FAQ
Debian
Written by Administrator   
Tuesday, 26 May 2009 17:55
WHAT is Debian?
The Debian Project is an association of individuals who have made common cause to create a free operating system. This operating system that we have created is called Debian GNU/Linux, or simply Debian for short.
An operating system is the set of basic programs and utilities that make your computer run. At the core of an operating system is the kernel. The kernel is the most fundamental program on the computer and does all the basic housekeeping and lets you start other programs.
Debian systems currently use the Linux kernel. Linux is a piece of software started by Linus Torvalds and supported by thousands of programmers worldwide.
However, work is in progress to provide Debian for other kernels, primarily for the Hurd. The Hurd is a collection of servers that run on top of a microkernel (such as Mach) to implement different features. The Hurd is free software produced by the GNU project.
A large part of the basic tools that fill out the operating system come from the GNU project; hence the names: GNU/Linux and GNU/Hurd. These tools are also free.
Of course, the thing that people want is application software: programs to help them get what they want to do done, from editing documents to running a business to playing games to writing more software. Debian comes with over 25113 packages (precompiled software that is bundled up in a nice format for easy installation on your machine) — all of it free.
It's a bit like a tower. At the base is the kernel. On top of that are all the basic tools. Next is all the software that you run on the computer. At the top of the tower is Debian — carefully organizing and fitting everything so it all works together.
It's all free?
You may be wondering: why would people spend hours of their own time to write software, carefully package it, and then give it all away? The answers are as varied as the people who contribute. Some people like to help others. Many write programs to learn more about computers. More and more people are looking for ways to avoid the inflated price of software. A growing crowd contribute as a thank you for all the great free software they've received from others. Many in academia create free software to help get the results of their research into wider use. Businesses help maintain free software so they can have a say in how it develops -- there's no quicker way to get a new feature than to implement it yourself! Of course, a lot of us just find it great fun.
Debian is so committed to free software that we thought it would be useful if that commitment was formalized in a written document. Thus, our Social Contract was born.
Although Debian believes in free software, there are cases where people want or need to put non-free software on their machine. Whenever possible Debian will support this. There are even a growing number of packages whose sole job is to install non-free software into a Debian system.
You say free, but the CDs/bandwidth cost money!
You might be asking: If the software is free, then why do I have to pay a vendor for a CD, or pay an ISP for downloading?
When buying a CD, you are paying for someone's time, capital outlay to make the disks, and risk (in case they don't sell them all). In other words, you are paying for a physical medium used to deliver the software, not for the software itself.
When we use the word "free", we are referring to software freedom, not that it's without cost. You can read more on what we mean by "free software" and what the Free Software Foundation says on that subject.
Most software costs over 100 US dollars. How can you give it away?
A better question is how do software companies get away with charging so much? Software is not like making a car. Once you've made one copy of your software, the production costs to make a million more are tiny (there's a good reason Microsoft has so many billions in the bank).
Look at it another way: if you had an endless supply of sand in your backyard, you might be willing to give sand away. It would be foolish, though, to pay for a truck to take it to others. You would make them come and get it themselves (equivalent to downloading off the net) or they can pay someone else to deliver it to their door (equivalent to buying a CD). This is exactly how Debian operates and why most of the CDs/DVDs are so cheap (only about 12 USD for 4 DVDs).
Debian does not make any money from the sale of CDs. At the same time, money is needed to pay for expenses such as domain registration and hardware. Thus, we ask that you buy from one of the CD vendors that donates a portion of your purchase to Debian.
What hardware is supported?
Debian will run on almost all personal computers, including most older models. Each new release of Debian generally supports a larger number of computer architectures. For a complete list of currently supported ones, see the documentation for the stable release.
Almost all common hardware is supported. If you would like to be sure that all the devices connected to your machine are supported, check out the Linux Hardware Compatibility HOWTO.
There are a few companies that make support difficult by not releasing specifications for their hardware. This means you might not be able to use their hardware with GNU/Linux. Some companies provide non-free drivers, but that is a problem because the company could later go out of business or stop support for the hardware you have. We recommend that you only purchase hardware from manufacturers that provide free drivers for their products.
I'm looking for more information.
You may want to check out our FAQ.
I'm still not convinced.
Don't take our word for it - try Debian yourself. Since hard disk space has become less expensive, you can probably spare about 2GB. If you don't want or need a graphical desktop, 600MB are sufficient. Debian can be easily installed on this extra space and can coexist with your existing OS. If you eventually need more space, you can simply delete one of your OSes (and after you see the power of a Debian system, we are confident you won't delete Debian).
As trying a new operating system will take some of your valuable time, it is understandable that you may have reservations. For this reason we compiled a list of pros and cons of Debian. This should help you decide whether you think it's worth it. We hope you'll appreciate our honesty and frankness.
How do I get Debian?
It's most popular to install Debian from a CD which you can buy for the price of the media at one of our many CD vendors. If you have good Internet access, you can download and install Debian over the Internet.
Please see our page about getting Debian for more information.
If you haven't yet, you may want to first look at the Linux Hardware Compatibility HOWTO.
Don't forget to take a look through the packages we offer (hopefully you won't be intimidated by the sheer number).
I can't set it up all by myself. How do I get support for Debian?
You can get help by reading the documentation which is available both on the web site and in packages you can install on your system. You can also contact us via the mailing lists or using IRC. One can even hire a consultant to do the work.
Please see our documentation and support pages for more information.
Who are you all anyway?
Debian is produced by almost a thousand active developers spread around the world who volunteer in their spare time. Few of the developers have actually met in person. Communication is done primarily through e-mail (mailing lists at lists.debian.org) and IRC (#debian channel at irc.debian.org).
The Debian Project has a carefully organized structure. For more information on how Debian looks from the inside, please feel free to browse the developers' corner.
Who uses Debian?
Although no precise statistics are available (since Debian does not require users to register), evidence is quite strong that Debian is used by a wide range of organizations, large and small, as well as many thousands of individuals. See our Who's using Debian? page for a list of high-profile organizations which have submitted short descriptions of how and why they use Debian.
How'd it all get started?
Debian was begun in August 1993 by Ian Murdock, as a new distribution which would be made openly, in the spirit of Linux and GNU. Debian was meant to be carefully and conscientiously put together, and to be maintained and supported with similar care. It started as a small, tightly-knit group of Free Software hackers, and gradually grew to become a large, well-organized community of developers and users. See the detailed history.
Since many people have asked, Debian is pronounced /ˈde.bi.ən/. It comes from the names of the creator of Debian, Ian Murdock, and his wife, Debra.