I did the upgrade dance with yum once when going from Fedora 5 to 7. It worked, but took a lot of time and left a helluva' lot of obscure lib-failures and stuff. I eventually got it working but I never felt sure it wouldn't fail on me whenever. After running the upgraded system for a month or so w/o any problems, I decided to do a fresh install from scratch with CentOS5 and clear all FUD I had left. Yum -upgrades works, but you'll potentially spend a lot of time clearing and fixing problems afterwards. You want a quick install, do a fresh one. Don't forget to backup your data first though. -----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Johnny Hughes Sent: Friday, May 30, 2008 5:07 PM To: CentOS mailing list Subject: Re: [CentOS] Fastest 4.6 -> 5.1 upgrade path Yum upgrades are the hardest to do, and are NOT recommended or supported. They can be accomplished in stages, however it is easy to get a non-bootable system. -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 5118 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos/attachments/20080530/944253e0/attachment-0005.bin>