On 9/29/21 8:29 AM, J Martin Rushton via CentOS wrote:
It's not supported. RH has a method that sometimes works for RHEL, but
there is no safe CentOS way to do a major upgrade. You need to
reinstall the OS and migrate your applications.
+1 The system "binary clone" of which CentOS is (or was rather) is not
designed to be "upgraded". The routine way is: install new release, copy
all accounts, and data from old system to it, install services,
configure them to a degree possible close to what was on old system.
This horse have been beaten to death. The problem someone asking this is
a consequence it people not doing search first (I for one use
duckduckgo), and reading all search reveals with open eyes, not picking
something to one's liking. Like: I want to do an upgrade. No matter all
search shows is: "install new release,...". I did find one post about
upgrade. But why it doesn't work?! Just read any of other posts about
upgrade, saying to the effect: it doesn't, shouldn't work, and going
into various lengts of explaining why.
I know what I said doesn't make pleasant reading, but it hopefully will
help someone with "modus operandi".
Valeri
On 29/09/2021 14:24, Gestió Servidors wrote:
Hi,
I'm doing some tests of upgrading CentOS from 7 to 8 reading this
step-by-step guide:
https://netshopisp.medium.com/how-to-upgrade-linux-servecentos-7-to-centos-8-ec2db96a189b
I'm trying this upgrade in a VM, so I can save "snapshots" and restart
in a past saved point. However, all my test ends wrong, exacly in Step
4 when I run "rpm -e `rpm -q kernel`". Then, systems says that some
packages are kernel dependencies. After I remove that dependencies, I
can't remove kernel...
Anybody has tested process upgrade from 7 to 8?
Thanks.
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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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