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CentOS-7 (1503) Release Notes

Last updated: October 11, 2015

1. Translations

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

2. Introduction

Hello and welcome to the second CentOS-7 release. The CentOS Linux distribution is a stable, predictable, manageable and reproducible platform derived from the sources of Red Hat Enterprise Linux (RHEL)1.

CentOS conforms fully with Red Hat's redistribution policy and aims to have full functional compatibility with the upstream product. CentOS mainly changes packages to remove Red Hat's branding and artwork.

We have decided not to follow Red Hat's usage of Installation Roles. In CentOS Linux all content from every distribution 'channel' is made available to the user at time of installation.

There is a documented and recommended upgrade path from CentOS-6 to CentOS-7. This path is only supported from the latest version of CentOS-6 (being 6.6 at the time of writing) to the latest version of CentOS-7. For more information on the upgrade procedure please take a look at upstream documentation. The tools needed for this functionality are still being tested and will be released at a later time. If you can help with the testing, please see this CentOS-Devel mailing list thread and this wiki entry.

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

3. Install Media

Various installation images are available for installing CentOS. Which image you need to download depends on your installation environment. All of these images can either be burned on a DVD or dd’ed to an USB memory stick.

If you are unsure which image to use, pick the DVD image. It allows selecting which components you want to install.

Live media images are also available, both for Gnome and KDE desktop environments. These allow you to test out CentOS by booting from the DVD or USB stick. The third livecd image uses Gnome, and as the livecd name implies, it is small enough to fit on a CD. This image does not contain libreoffice. You can also install CentOS to your hard disk from the live media images, but please note that what gets installed on your hard disk is exactly the same as you see when using the live media. For more flexibility in selecting which packages you want to have installed, please use the DVD image.

The netinstall image can be used for doing installs over network. After booting the computer with the netinstall image, the installer will ask from where it should fetch the packages to be installed.

The everything image contains all the packages that are available for CentOS-7, including those that are not directly installable from the installer. If you want to install those other packages, you must mount the install media on your installed system after the installation, and copy or install the packages from there. For most users installing from the DVD image and then installing the other packages with ”yum install <packagename>” instead is probably easier.


Please see our Announcement concerning the re-release of 3 ISOs, our centos-release package, and our 7.1.1503/os/ directory.

[Bug 8353]

At least 1024 MB RAM is required to install and use CentOS-7 (1503). When using the Live ISOs for install, 1024 MB RAM produces very slow results and even some install failures. At least 1280 MB RAM is recommended for LiveCD installs and at least 1344 MB RAM is recommend for LiveGNOME or LiveKDE installs.

4. Verifying Downloaded Installation Images

Before copying the image to your preferred installation media you should check the sha256sum of the downloaded installation images.

sha256sum x86_64:
85bcf62462fb678adc0cec159bf8b39ab5515404bc3828c432f743a1b0b30157  CentOS-7-x86_64-DVD-1503-01.iso
8c3f66efb4f9a42456893c658676dc78fe12b3a7eabca4f187de4855d4305cc7  CentOS-7-x86_64-Everything-1503-01.iso
96ee805573d0617ee11704e7973b55387adef13c6efdc82d50d287dba00dfaf1  CentOS-7-x86_64-LiveCD-1503.iso
2cfc9fab2edb0be51b75ee63528b61cad79489129d2aad1713eeed1b4117ab47  CentOS-7-x86_64-LiveGNOME-1503.iso
6b2cd1c30092e9a141a458d40d0fcba74207b6c80e4f68dc7f800fbe1d7bae1b  CentOS-7-x86_64-LiveKDE-1503.iso
7cf1ac8da13f54d6be41e3ccf228dc5bb35792f515642755ff4780d5714d4278  CentOS-7-x86_64-Minimal-1503-01.iso
498bb78789ddc7973fe14358822eb1b48521bbaca91c17bd132c7f8c903d79b3  CentOS-7-x86_64-NetInstall-1503.iso

5. Major Changes

More information can be found here.

6. Deprecated Features

7. Known Issues

A list of known upstream issues can be found here. Given that we build from the same sources, many if not all of those issues will likely also apply to CentOS Linux.

8. Fixed Issues

9. Packages and Applications

9.1. Packages modified by CentOS

9.2. Packages removed from CentOS that are included upstream

9.3. Packages added by CentOS that are not included upstream

9.4. Packages released as 7.1406 updates with older packages on the 7.1503 install media

10. Sources

All CentOS-7 sources are hosted at git.centos.org. All code released into the distribution originated from git.centos.org.

Source RPMs will also be published once the release is done, in the usual location at http://vault.centos.org/centos/7/

From a CentOS machine you can easily retrieve sources using the yumdownloader --source <packagename> command.

11. 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.

11.1. Special Interest Groups

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

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

11.2. Mailing Lists 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 mailing lists and the fora.

11.3. 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 mailing list.

12. Further Reading

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

13. Thanks

We thank everyone involved for helping us produce this product and would like to specifically acknowledge the extra effort made by the QA Team. Without them working lots and lots of hours in evenings, nights, weekends and holidays, we couldn't have released this Release as fast as we did. A special thanks also goes to the CentOS-community. A more complete list of the contributors to this release can be found at /usr/share/doc/centos-release/Contributors of your new CentOS-7 installation.

Copyright (C) 2015 The CentOS Project

2023-09-11 07:22