

Run the following command to check the potential problem you might encounter with an upgrade from CentOS 6 to CentOS 7 before making a changes to the system.

# yum -y install preupgrade-assistant-contents redhat-upgrade-tool preupgrade-assistant PreUpgrade Assistant:

Redhat-upgrade-tool is not available on standard repositories, you must setup the repository to install it. If you like to give a try on development, you can just follow the simple steps. CentOS has not yet posted any official document on upgrading the CentOS 6, since there is no official documentation we are not recommending this upgrade on production environment. As per the CentOS 7 announcement, it is possible to upgrade the CentOS 6 to CentOS 7 with the help of redhat-upgrade-tool. Two days back, i wrote Step by step installation CentOS 7 which is the clean installation of OS.
