Migrating CentOS 6, 7 and 8 to Oracle Linux or CentOS Stream 8

The CentOS project heralded the end of a CentOS Linux as you knew it some time ago, ending an era of CentOS as an RHEL reconstruction. CentOS 8 will continue as a Stream version that you should update before the end of 2021.

If you want to migrate to another RHEL or CentOS Stream fork, here's how:

Migrate Centos 8 to CentOS Stream 8:

$ sudo dnf install centos-release-stream
Last metadata expiration check: 1:27:40 ago on Tue 08 Dec 2020 01:58:10 PM UTC.
Dependencies resolved.
================================================================================
 Package                   Arch       Version                  Repository  Size
================================================================================
Installing:
 centos-release-stream     x86_64     8.1-1.1911.0.7.el8       extras      11 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 11 k
Installed size: 6.6 k
Is this ok [y/N]:

Then run:

$ sudo dnf distro-sync

Migrate CentOS 6, 7, and 8 to Oracle ( Oracle Linux is a Red Hat Enterprise Linux rebuild, with some Oracle patches):

$ curl -O https://linux.oracle.com/switch/centos2ol.sh
$ sh centos2ol.sh

The following packages will be removed:

• centos-release-cr
• libreport-plugin-rhtsupport
• yum-plugin-RHN
• desktop-backgrounds-basic
• CentOS-logos
• libreport-cent
• libreport-plugin-MantisBT
• sl-logos

Depending on the version, new packages are installed:

• basesystem
• initscripts
• oracle-logos
• plymouth (CentOS 7)
• grub2 (CentOS 7)
• oraclelinux-release-notes (CentOS 6)
• plymouth (CentOS 6)
• grub (CentOS 6)
• grubby
• kernel UEK