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How to Elevate from CentOS 7/8 to AlmaLinux

CentOS is nearing End of Life. This guide will walk you through the process of migrating your CentOS system to AlmaLinux using the AlmaLinux ELevate tool. ELevate offers a smooth transition between major versions of Red Hat Enterprise Linux (RHEL) derivatives, including CentOS.

Important Note: Before proceeding, it’s crucial to back up your entire system. This ensures you can recover data in case of any unforeseen issues.

Prerequisites

  • A CentOS system (version 7 or 8) with internet access.
  • Root privileges or a user with sudo access.

Steps

Update your CentOS System:

Ensure your CentOS system is up-to-date with the latest packages. Run the following command in your terminal:

sudo yum update -y

Install the ELevate Repository:

The ELevate repository provides the necessary tools for migration. The specific steps will depend on your CentOS version:

CentOS 7:

sudo yum install -y http://repo.almalinux.org/elevate/elevate-release-latest-el7.noarch.rpm

CentOS 8:

The ELevate repository is already available in AlmaLinux 8 sources. You can skip this step.

Install Leapp Utility:

Leapp is the core tool within ELevate that handles the migration process. Use the following command to install it:

sudo yum install -y leapp

Pre-upgrade Check (Optional but Recommended):

Before initiating the migration, it’s wise to perform a pre-upgrade check. This step identifies potential issues that might hinder a successful transition. Run the following command:

sudo leapp preupgrade

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