Migration from CentOS-5 to CentOS-6

NOTE: None of the methods described below are supported by the CentOS Project.

Direct Upgrades Are Not Supported

An anaconda or yum upgrade is completely unsupported. See 6.0 Release Notes

Some users have managed an anaconda upgrade as discussed below. One way to migrate from CentOS-5 to CentOS-6 is the following:

Safest Migration

Riskier Migration

Living on the Edge

Anaconda has an option which can be used to force the installer to recognize and try to upgrade an existing installation. This is the boot-time option upgradeany. Use it in the installer by interrupting the boot process, pressing the the <Tab> key to interrupt the boot process, and to edit the boot line to append that string at the end of the boot line.

Several known issues (not all of them !) when using this method to migrate from CentOS-5 to CentOS-6:

All in all, probably much more trouble than a fresh install and migration. There is of course no guarantee that the resulting system will not have hidden issues and instabilities. Once again, this path is unsupported.


This page created and maintained by PhilSchaffner. Other Wiki contributors are invited to make corrections, additions, or modifications.

HowTos/MigrationGuide/MigratingFiveToSix (last edited 2011-07-26 16:58:57 by AlanBartlett)