Sajid Ali
Sajid Ali
Linux & Windows Server Administrator | Cloud Architect: I possess 10 years of professional experience with administration of different hosting provider’s Linux and Windows based servers on a large production level.

How to migrate from CentOS 8 to AlmaLinux 8.

AlmaLinux is a free and open source Linux distribution, created originally by CloudLinux to provide a community-supported, production-grade enterprise operating system that is binary-compatible with Red Hat Enterprise Linux.

Prerequisites:

Backup project and important files/directories:

Take a full backup of your important config files, directories, project files and databases etc. So, if something goes wrong, we should be able to go back quickly.

Step # 1:  Installing all updates on CentOS 8.

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First, make sure all the existing packages on your system are up to date.

dnf update

Now, verify CentOS Linux 8 version.

cat/etc/redhat-release

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OR

cat/etc/centos-release

Step # 2: Download the Almalinux deploy script.

Download the almalinux-deploy.sh script using the wget or curl command, type:

wget https://raw.githubusercontent.com/AlmaLinux/almalinux-deploy/master/almalinux-deploy.sh

# read the script #

vim almalinux-deploy.sh

set up executable permission using the chmod command

chmod -v +x almalinux-deploy.sh

Step # 3: Migration from CentOS 8 to AlmaLinux 8.

Now execute almalinux-deploy.sh for migrating CentOS to AlmaLinux.

./almalinux-deploy.sh

Step # 4: Verification the Server version.

Check the server version using command below.

cat /etc/redhat-release

OR

cat /etc/0s-release

Make sure there are no errors, execute the command below.

tail -f /var/log/messages

Conclusion:

In this article you have learned how to migrate from CentOS 8 to AlmaLinux. Check out the AlmaLinux website for documentation  and GitHub link.

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