Tips : Upgrade Your Drupal CMS To 6.9 and 5.15

Tips : Upgrading Drupal with Git

Drupal development team has released Drupal 5.2 on July 26, 2007. It fixes two security vulnerabilities, so it is highly recommended that you upgrade as soon as possible. Many Drupal installations often contain extra Drupal modules, and almost always the also contain local customizations. 

Question arises: how to upgrade your Drupal installations?

Tutorial : Upgrading to Drupal 4.7

Drupal Tutorial : Upgrading Drupal 

Upgrading Drupal

About this video : This lesson provides a step-by-step tutorial showing the user how to upgrade a core Drupal installation.