How to upgrade alma 8 to version 9

Alma version upgrade instructions (8 -> 9)

Running these commands could break your system, remember to create backups!

Start with updating packets:

sudo yum update -y

Reboot:

reboot

Download elevate repository:

sudo yum install -y http://repo.almalinux.org/elevate/elevate-release-latest-el$(rpm --eval %rhel).noarch.rpm

Import GPG-key:

sudo rpm --import https://repo.almalinux.org/elevate/RPM-GPG-KEY-ELevate

Install leapp packets:

sudo yum install -y leapp-upgrade leapp-data-almalinux

Do a preupgrade check  with command:

sudo leapp preupgrade

The preupgrade check might show errors, in this example the problem is "Possible problems with remote login using root account".

All commands below are meant to be run on your server through an SSH connection. More instructions about  https://linuxhint.com/ssh-connection-guide/

connect by running (replace user and server_ip with your details):

ssh user@server ip

Open the SSH daemon config file:

sudo vim /etc/ssh/sshd_config

Find the line containing PermitRootLogin.To disable root login with password over SSH, set it to:

 "PermitRootLogin" and add "prohibit-password".

to allow root login with password set it to "PermitRootLogin yes"

Save and exit by pressing Esc and then type :wq

Check current SSH settings

sshd -T | grep -Ei 'permitrootlogin|passwordauthentication'

(Optional) Edit SSH settings directly from the command line

You can update these settings without an editor by running:

sudo sed -i 's/^#*PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
sudo sed -i 's/^#*PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config

Note: To disable root login with password, replace yes with prohibit-password.

Restart SSH services

sudo systemctl restart sshd

confirm the changes

sshd -T | grep -Ei 'permitrootlogin|passwordauthentication'

Do the preupgrade check again with command:

sudo leapp preupgrade

When all errors and prohibits are gone, start the upgrade with command:

sudo leapp upgrade

Reboot after the upgrade is done:

reboot

Choose "ELevate-Upgrade-Initramfs".

Alma should now be upgraded.

you can check the Alma version using the following commands.

cat /etc/redhat-release

cat /etc/os-release

If, the output shows AlmaLinux 9, the upgrade from almalinux (8 -> 9) was successful.