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| [[2005-12-16]]<ref>{{ cite web | url=http://lists.centos.org/pipermail/centos-announce/2007-December/014511.html | title=CentOS 4.6 is released for i386, x86_64, s390, s390x and ia64 | author=Johnny Hughes | date=2007-12-16 | accessdate=2008-06-01 }}</ref>
| [[2005-12-16]]<ref>{{ cite web | url=http://lists.centos.org/pipermail/centos-announce/2007-December/014511.html | title=CentOS 4.6 is released for i386, x86_64, s390, s390x and ia64 | author=Johnny Hughes | date=2007-12-16 | accessdate=2008-06-01 }}</ref>
| [[2005-05-15]]<ref name="rhel-errata" />
| [[2005-05-15]]<ref name="rhel-errata" />
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| [[2008-09-13]]<ref>{{ cite web | url=http://lists.centos.org/pipermail/centos-announce/2008-September/015241.html | title=CentOS 4.7 is released for i386 and x86_64 | author=Johnny Hughes | date=2008-09-13 | accessdate=2008-09-14 }}</ref>
| [[2008-07-24]]<ref>{{ cite web | url=http://www.redhat.com/archives/rhelv4-announce/2008-July/msg00002.html | title=Red Hat Enterprise Linux 4.7 GA Announcement | author=[[Red Hat Enterprise Linux]] team | date=2008-07-24 | accessdate=2008-09-14 }}</ref>
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Revision as of 12:39, 14 September 2008

CentOS
File:Centos logo.png
CentOS 5 running GNOME
DeveloperLance Davis
OS familyLinux
Working stateCurrent
Source modelFree software
Initial releaseDecember 1, 2003 (2003-12-01)
Latest release5.2 / June 24, 2008; 16 years ago (2008-06-24)
Kernel typeMonolithic kernel
LicenseVarious
Official websitewww.centos.org

CentOS is a freely-available Linux distribution that is based on Red Hat Enterprise Linux. This rebuild project strives to be 100% binary compatible with the upstream product and, within its mainline and updates, not to vary from that goal. Additional software archives hold later versions of such packages, along with other Free and Open Source Software RPM-based packages. CentOS stands for Community ENTerprise Operating System.

Structure

Red Hat Enterprise Linux is largely composed of free and open source software, but is made available in a usable, binary form (such as on CD-ROM or DVD-ROM media or download) only to paying subscribers. As required, Red Hat releases all source code for the product publicly under the terms of the GNU General Public License and other licenses. CentOS developers use that source code to create a final product that is very similar to RHEL; the logos must be changed, because Red Hat does not allow them to be used for redistribution.[1] CentOS is freely available for download and use by the public, but is not maintained or supported by Red Hat. There are other distributions derived from RHEL's source as well, but they have not attained the surrounding community that CentOS has built; CentOS is generally the one most current with Red Hat's changes.

CentOS' preferred software updating tool is based on yum, although support for use of an up2date variant exists. Each may be used to download and install both additional packages and their dependencies, and also to obtain and apply periodic and special (security) updates from repositories on the CentOS Mirror Network.

CentOS refers to the source as "PNAELV" (Prominent North American Enterprise Linux Vendor), which means Red Hat, coined in response to questions raised by Red Hat's legal counsel in a letter to project members regarding possible trademark issues.

Versioning scheme

  • CentOS version numbers have two parts, a major version and a minor version. The major version corresponds to the version of Red Hat Enterprise Linux from which the source packages used to build CentOS are taken. The minor version corresponds to the update set of that Red Hat Enterprise Linux version from which the source packages used to build CentOS are taken. For example, CentOS 4.4 is built from the source packages from Red Hat Enterprise Linux 4 update 4.
  • Since mid-2006, starting with RHEL 4.4 (formerly known as RHEL 4.0 update 4), Red Hat has adopted a versioning convention identical to that of CentOS, e.g., RHEL 4.5 or RHEL 3.9.[2]

Release history

The architecture information is taken from the CentOS Overview page.

CentOS Release Architectures RHEL base CentOS release date RHEL release date
2 i386 2.1 2004-05-14[3] 2002-05-17[4]
3.1 i386, x86_64, ia64, s390, s390x 3 2004-03-19[5] 2003-10-23[4]
4.6 i386, x86_64, ia64, alpha, s390, s390x, ppc (beta), sparc (beta) 4.6 2005-12-16[6] 2005-05-15[4]
4.7 i386, x86_64 4.7 2008-09-13[7] 2008-07-24[8]
5 i386, x86_64 5 2007-04-12[9] 2007-03-14[10]
5.1 i386, x86_64 5.1 2007-12-02[11] 2007-11-07[12]
5.2 i386, x86_64 5.2 2008-06-24 2008-05-21

Architectures

CentOS supports the same architectures as Red Hat Enterprise Linux:[13][14]

The following two architectures are supported in CentOS but not supported upstream:[13]

  • Alpha (CentOS 4 only)
  • SPARC (beta support since CentOS 3)

Live USB

A Live USB of CentOS can be created manually or with UNetbootin [15].

References

  1. ^ "Red Hat License Agreements". Red Hat. Retrieved 2008-06-01.
  2. ^ "Red Hat Enterprise Linux > AS/ES/WS Basics". Red Hat. Retrieved 2008-08-11. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  3. ^ John Newbigin (2004-05-14). "CentOS-2 Final finally released". Retrieved 2008-06-01.
  4. ^ a b c Red Hat. "Red Hat Enterprise Linux Errata Support Policy". Retrieved 2008-06-01.
  5. ^ Lance (2004-03-19). "CentOS 3.1 has now been released". Retrieved 2008-06-01.
  6. ^ Johnny Hughes (2007-12-16). "CentOS 4.6 is released for i386, x86_64, s390, s390x and ia64". Retrieved 2008-06-01.
  7. ^ Johnny Hughes (2008-09-13). "CentOS 4.7 is released for i386 and x86_64". Retrieved 2008-09-14.
  8. ^ Red Hat Enterprise Linux team (2008-07-24). "Red Hat Enterprise Linux 4.7 GA Announcement". Retrieved 2008-09-14.
  9. ^ Karanbir Singh (2007-04-12). "Release for CentOS-5 i386 and x86_64". Retrieved 2008-06-01.
  10. ^ Red Hat Enterprise Linux team (2007-03-15). "Red Hat Enterprise Linux 5 Now Available". Retrieved 2008-06-01.
  11. ^ Karanbir Singh (2007-12-02). "Release for CentOS-5.1 i386 and x86_64". Retrieved 2008-06-01.
  12. ^ Red Hat Enterprise Linux team (2007-11-07). "Red Hat Enterprise Linux 5.1 General Availability Announcement". Retrieved 2008-06-01.
  13. ^ a b "About CentOS". CentOS. Retrieved 2008-06-01.
  14. ^ "Red Hat Enterprise Linux server details". Red Hat. Retrieved 2008-06-01.
  15. ^ [1]
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