CentOS 6.0 Release Notes

Last updated: June 24th, 2011

1. Translations

Translations of these release notes are available for the following languages :

• Česky (cs) - David Hrbáč

• English (en)

• Português do Brasil (pt-br) - [Lucas do Amaral Saboya]

• 简体中文 (zh-cn) - Timothy Lee

• 繁體中文 (zh-tw) - Timothy Lee

2. Introduction

Welcome to the CentOS 6.0 release. CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by our Upstream OS Provider (UOP)¹.

CentOS conforms fully with the upstream vendor's redistribution policy and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.)

CentOS 6.0 represents many changes from previous releases.

CentOS 6.0 has been completely rebuilt using a newer build system and library checks to confirm upstream binary compatibility.

We have decided not to follow the UOP's usage of Installation Codes. All 'channels' are available to the System Administrator at time of installation.

Please read through the other sections before trying an install or reporting an issue.

3. Install Media and sha1sum

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i386 media and their sha1sums are:

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x86_64 media and their sha1sums are:

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4. Known Issues

• The graphical installer is for systems with over 652MB of memory. Text mode will automatically be used if the system has less memory.

• The text installer has limited capabilities compared to the GUI installer. Most notably there is no support for configuring partition layout, storage methods or package selection. Please refer to the official documentation for details.

• The anaconda installer needs at least 512MB of memory to work.

• The message "Insufficient memory to configure kdump!" appears during install. This is a known upstream bug which appears on systems with less than 4 GB RAM and solved by updating to kexec-tools-2_0_0-153_el6 or newer.

5. Packages and Applications

5.1. Packages modified by CentOS

• anaconda
• firefox

5.2. Packages removed from CentOS that are included upstream

• redhat-release-*
• redhat-release-notes*
• rhnlib
• rhn-check
• rhn-client-tools
• rhnsd
• rhn-setup
• rhn-setup-gnome
• yum-rhn-plugin

5.3. Packages added by CentOS that are not included upstream

• centos-release

6. How to help and get help

As a CentOS user there are various ways you can help out with the CentOS community. Take a look at our Contribute page for further information on how to get involved.

6.1. Special Interest Groups

CentOS consists of different Special Interest Groups (SIGs) that bring together people with similar interests. The following SIGs already exist:

• Artwork - create and improve artwork for CentOS releases and promotion

• Promotion - help promoting CentOS online or at events

• Virtualization - unite people around virtualization in CentOS

And we encourage people to join any of these SIGs or start up a new SIG, e.g.

• Alpha, S390, Sparc and PPC port - help with porting CentOS to other architectures
• Hardware compatibility - provide feedback about specific hardware
• RPM Packaging - contribute new useful RPM packages
• Translation - help translating the documentation, website and wiki content

6.2. Mailinglists and Fora

Another way you can help others in the community is by actively helping and resolving problems that users come up against in the mailinglists and the fora.

6.3. Wiki and Website

Even as an inexperienced CentOS user we can use your help. Because we like to know what problems you encountered, if you had problems finding specific information, how you would improve documentation so it becomes more accessible. This kind of feedback is as valuable to others as it would have been to you so your involvement is required to make CentOS better.

So if you want to help out and improve our documentation and wiki, register on the wiki or subscribe to the centos-docs mailinglist.

7. Further Reading

The following websites contain large amounts of information to help people with their CentOS systems :

• Upstream release notes and documentation : http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/index.html

• http://www.centos.org/

• http://wiki.centos.org/

• http://lists.centos.org/

• http://bugs.centos.org.

• http://planet.centos.org/

• http://mirrors.kernel.org/redhat/redhat/linux/enterprise/6Client/en/os/SRPMS/

• http://mirrors.kernel.org/redhat/redhat/linux/enterprise/6Server/en/os/SRPMS/

8. Thanks

We thank everyone involved for helping us produce this product.

Copyright (C) 2011 The CentOS Project

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