Drupal upgrade notes

Some notes to remember while upgrading from one version of Drupal to another:

• do database backup (dget backup databasename)
• install the update-status module before upgrading and check that all the old modules are up to date
• warning that this is not 100% accurate if there are CVS modules or others without proper release dates. The date module seems to cause problems and might have to be manually checked for the latest version
• make sure update-status is removed together with any other un-needed modules
• best to un-install them as well
• check all other modules are available already in new version (some people recommend disabling modules during the upgrade)
• switch all themes to core themes supported in the new version
• do a final backup in another place, (dget backup databasename temp)
• dget upgrade /path_to_website
• you may have to run upgrade.php just to get rid of error messages
• don't forget to enable update-status