The newly released CentOS-6.4 includes packages from all variants and to ensure that users don’t have too complex a system to work with when it comes to installation, all upstream repositories have been combined into one. According to the mailing list announcement that are quite a few fundamental changes in this release as compared to previous CentOS-6 releases and it is recommended that those who are willing to go for version 6.4 better go through the release and technical notes before applying the upgrade on their production systems.
“There are many fundamental changes in this release, compared with the past CentOS-6 releases, and we highly recommend everyone stufy the Release Notes as well as the upstream Technical Notes about the changes and how they might impact your installation”, reads the mailing list release announcement.
Some of the features of the release are fully-supported pNFS client; improved identity management and support for VMware and Microsoft Hyper-V virtualization support.
It is recommended that users who are still on CentOS-4 or CentOS-5 better go for a reinstall rather than an upgrade. Users whose systems are on CentOS-6.x may go with ‘yum update’ and their machine should seamlessly move to CentOS-6.4.