Create a new D10 portal. Enable migrate modules.
Enable https://www.drupal.org/project/migrate_upgrade to allow migrations via Drush.
Set up a Migrate Database
1. Install Upgrade Status[https://www.drupal.org/project/upgrade_status] module to check issues contrib and custom modules compatibility.
2. Remove Upgrade Status when all checks are green and ready to go. Uninstall Upgrade status and remove it from Composer.
composer remove drupal/upgrade_status3. Temporarily add write access to protected files and directories
To upgrade in Ubuntu 18.04 server.
Step I: Get the upgrade command shell and check upgrade issues
Get the MySQL Shell download link here: https://dev.mysql.com/downloads/shell/
This shell will assist in finding issues with the current installation.
Install the MySQL upgrade shell with the command