How to upgrade from Ubuntu 20.04 to Ubuntu 22.04 with cPanel ELevate

Question

How do you upgrade Ubuntu 20.04 to 22.04 with cPanel ELevate?

Answer

Note: Before proceeding with the upgrade, it is recommended to review the following list of blockers to ensure the upgrade process will not interfere with any software that you require:
Known cPanel ELevate Blockers

Warning: Upgrading the OS can cause data loss or catastrophic system failures. Backups should be made and stored off-server before attempting an upgrade.

1. Backup your accounts
2. Log in to the server via SSH or WHM's Terminal as the root user

3. Run apt to update out-of-date packages:

   # apt update
   # apt upgrade

4. Run upcp to update cPanel:

   # /scripts/upcp

5. Reboot the server:

   # shutdown -r now

6. Wait for the reboot to finish
7. Log in to the server via SSH or WHM's Terminal as the root user

8. Download the cPanel ELevate script:

   # wget -O /scripts/elevate-cpanel https://raw.githubusercontent.com/cpanel/elevate/release/elevate-cpanel; chmod 700 /scripts/elevate-cpanel

9. Run the following command to check for upgrade blockers:

   # /scripts/elevate-cpanel --check

10. Resolve each listed issue

11. Check for upgrade blockers again:

    # /scripts/elevate-cpanel --check

    If there are no more blockers, you should see the following messages at the end of the output.

    CONFIG_TEXT: There is no known blockers to start the elevation process.
    You can consider running: 
    #/scripts/elevate-cpanel --start

12. Run the following command to begin the upgrade process:

    # /scripts/elevate-cpanel --start

Note: The elevation process can potentially take 90 minutes to complete and requires multiple reboots. Some reboots can be longer than usual. Do not interrupt the upgrade process.

Note: You can check the current status of the update by running the following command:
/scripts/elevate-cpanel --status

# Additional Resources

How to run a manual backup

cPanel ELevate project