How to Migrate from RHEL 8 to CentOS 8

Live migration of a RedHat Enteprise Linux 8.0 to Centos 8.0

RHEL 8 to CentOS 8 migration guide.

If you tried a RHEL 8 Beta or you have a Developer’s License of RedHat Enterprise Linux 8 and you want / need to migrate to CentOS 8 for any reason (licensing, cost, hobby, fun) without loosing any data you can do it like this:

 

Importing CentOS 8 Keys

First of all you need to download, rename and import the CentOS 8 key or yum will fail like this:

Run this commands:

 

Change Repositories from Redhat’s to CentOS

Disable the subscription manager repo of Redhat:

 
Move redhat.repo somewhere else:
 

 

Create or Download CentOS repos:

You need:

CentOS-AppStream.repo CentOS-Base.repo CentOS-Extras.repo CentOS-PowerTools.repo inside /etc/yum.repos.d/

You can create them copying them from here:

 

 

 

 

Now you have no redhat repos and only CentOS 8 repos in your system. Clean yum:

And try an update:

 

It should reinstall every package from the CentOS 8 Repositories.

 

If it does not, try to create a rpmlist of all installed packages and xargs it to reinstall manually:

 

 

 

 

If you succeed you should see yum loading only CentOS Repos when issuing a yum install / reinstall like this:

 

 

You can also uninstall subscription manager now:

 

 

Don’t forger to grub2-mkconfig !

On RHEL the path is:

grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg

You need to use /centos/ like this:

 

 

0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
RHEL: iSCSI target/initiator configuration on RHEL6
Viewed 7668 times since Sat, Jun 2, 2018
RHEL: Extending a multipath LUN
Viewed 3357 times since Sun, May 27, 2018
LUKS dm-crypt/Device encryption GUIDE
Viewed 1549 times since Fri, Jul 13, 2018
How to run command or code in parallel in bash shell under Linux or Unix
Viewed 2180 times since Tue, Aug 6, 2019
LVM: Move allocated PE between Physical Volumes
Viewed 2729 times since Sat, Jun 2, 2018
How to stop and disable auditd on RHEL 7
Viewed 33184 times since Tue, Aug 6, 2019
How To: Linux Hard Disk Encryption With LUKS [ cryptsetup Command ]
Viewed 6555 times since Fri, Jul 13, 2018
RHEL7: How to get started with Firewalld.
Viewed 10568 times since Wed, May 22, 2019
logrotate Log Rotate Configuration
Viewed 2510 times since Sun, Jan 12, 2020
Install OpenVPN On CentOS / RHEL 7
Viewed 2168 times since Fri, May 15, 2020