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Now that CentOS 6.0 is making its way to the various mirror sites, I wanted to solicit opinions on the upgrade process. In working with the commercial RedHat 5.6 and 6.x distributions for the past few months, I've been relying on a fresh install instead of an in-place upgrade for my test systems.

Since the real CentOS 6 release is here, is anyone planning on performing the migration in-place? Are there any situations where it makes sense? If so, what are the pitfalls of an in-place update?

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Do you mean 5.6? I don't find reference to 6.X anywhere on the main CentOS site –  SpacemanSpiff Jul 10 '11 at 16:22
    
Nevermind, I found it... boy you really like bleeding edge eh? Have fun :) –  SpacemanSpiff Jul 10 '11 at 16:24
    
I've been using RHEL6 in a limited capacity for months, then Scientific Linux 6, after resigning myself to the fact that CentOS 6 was just not going to happen... This morning, I noticed my local mirror was downloading quite a bit and discovered that 6.0 was finally released. But the one issue that hasn't been fully-addressed is the recommended migration path. –  ewwhite Jul 10 '11 at 16:28
    
If you are running SL6, why switch back to Centos? –  Rilindo Jul 10 '11 at 16:46
    
Just as a test-bed. I only started working with SL6 a week ago since I have a large number of systems that may need to be moved from RHEL/CentOS 5.6 to 6. –  ewwhite Jul 10 '11 at 16:53

2 Answers 2

up vote 12 down vote accepted

We recommend everyone run through a reinstall rather than attempt an inplace upgrade from CentOS-4 or CentOS-5!

Source: http://lists.centos.org/pipermail/centos-announce/2011-July/017645.html

You can run this upgrade centos6 just by using yum upgrade --enablerepo=centosplus.

Do not forget: each system running centos is individual (!). I recommend you to test this upgrade on a virtual machine before upgrading (i did so!). Of course, this process may takes some hours. I've upgraded several internal systems virtually today and monitoring them right now. regards, msec.

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Although it may be possible to do such update with Yum and some manual tinkering, the only supported and recommended way to update from CentOS 5.x to CentOS 6 is a clean re-install.

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I don't think this answers his question. –  SpacemanSpiff Jul 10 '11 at 17:04
    
Not an answer to the question. –  Erik Aronesty Nov 22 '13 at 18:04

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