Will this work for updating from CentOS-3 to CentOS-4 as well? Everything I've seen so far seems to be recommending a complete re-install. I've not gotten the opportunity to test it myself, but if I update those three rpms, can I upgrade -3?

-Scott

Mike Kercher wrote:

You just need the centos-release rpm, yum and yum-conf rpms. You may have to force the centos-release install. Import the GPG key from a mirror and then run 'yum update'. The Centos rpms are already stripped of Redhat trademark issues.

Mike

-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of techlist@pathfinder.phys.utk.edu Sent: Monday, July 18, 2005 12:54 PM To: centos@centos.org Subject: [CentOS] Migrating from RHEL 4 to CentOS

Hello, I'm thinking about migrating from RHEL 4 to CentOS. Is there a document that provide pointer / guidance for doing that ? or is this document: http://www.centos.org/modules/smartfaq/faq.php?faqid=19 relevant enough to follow in my situation ?

I understand that I should probably strip the install of any RedHat images, trademark, etc, as to not infringing any copyright. So I am wondering if there's a list of things to do / document to show that.

My current installation is:

$ cat /etc/redhat-release Red Hat Enterprise Linux WS release 4 (Nahant Update 1)

Thanks for any help / pointer.

RDB _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

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On Tue, 2005-07-19 at 10:33 -0500, Mike Kercher wrote:

I think I've read that the changes between 3 and 4 are too drastic to do an upgrade.

Upgrades are not recommended by Red Hat, and doing a yum upgrade would be problematic at best; however, an anaconda upgrade CAN be done (attempted?) by specifying the "upgradeany" switch at the CD/DVD boot prompt, or on the kernel line if started from grub for a hard disk or network install/upgrade. As usual have a good backup first (preferably a bootable "clone" on separate disk[s]/partitions), be prepared to deal with left-over packages after the upgrade ("rpm -qa --last > RPMS_Installed" and look at the end of the list for packages older than the upgrade date), and YMMV.

Phil