2. What Is Aegir? A Collection of Drupal Modules That Deploy, Manage and Maintain The Software Content of Drupal Sites http://groups.drupal.org/aegir-hosting-system
3. Why Aegir? Hard and Tedious and Error Prone to: Maintain Multiple Core Versions Update Multiple Sites with Different Modules Deploy New Sites with the Same Core and Modules Configure Apache and MySQL
4. Aegir Terms (Node Types) Servers Linux server(s) on which Aegir is installed or Aegir manages Remote deployment supposedly possible, but not tested by me Only Linux (not Windows) supported Platforms Collections of a Drupalcore, install profile and specific modules Sites Instances of Platforms
5. Aegir Requirements Linux / Apache / MySQL / PHP Same as most people use for Drupal Root Access Drush Command line PHP scripts for managing Drupal sites
8. Key Features Existing Sites Can Be Imported Migrate a Site from One Platform to Another This is how you upgrade Automatically runs update.php Upgrade All Sites on a Platform All at Once Verify compatibility between current and new platform Deploy New Sites on a Platform Configure Apache Create MySQL database Modify SETTINGS.PHP One-Click Site Backup
10. Cautions Installation Is Difficult Root Access Is Required So, probably not useful for hosted sites Still Early Release Code Not Ready for Production Servers