RHEL3 -> RHEL4 upgrade?

Dhawal Doshy dhawal at NETMAGICSOLUTIONS.COM
Wed Jul 20 20:32:31 IST 2005

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Ugo Bellavance wrote:
>>A lot of things change from 3 to 4 primarily the kernel and the
>>file-system layout (ext3 over lvm2) and selinux
> And udev I think.

Ah yes, udev is an important change as well

>>Anyways i tend to agree with Joshua on a complete re-install rather than
>>an upgrade.. OR use the first method of a CD based upgrade (which IMO
>>would be the one recommended by redhat), just make sure you take a
>>complete backup of everything in any case.
> That is all already in my head... I was just wondering if someone had
> actually done it (or will I be the first... ;)?)

You certainly won't be the first, check "rhel3 to rhel4 upgrade 
site:redhat.com" in google. It would be a good idea to skim through the 
typical problems that people have faced so far.

If you have a strong backup policy, then go ahead, upgrade and share 
your experience. I had once done this for a development qmail + 
courier-imap server running centos 3.3 but it broke a few things, none 
which were not fixable with a little effort, like gamin over sgi_fam and 
no perl-suidperl (required by qmail-scanner) etc.. Later a fresh install 
was the best option.

- dhawal

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