12.1. Concept: Cache
Overview of the cache and the site data that can be cached.
12.2. Clearing the Cache
How to clear the cache using Drush or the user interface.
12.3. Concept: Data Backups
Overview of data backups and what should be backed up on a site.
12.4. Concept: Log
Overview of logs and where to find recent log messages.
12.5. Concept: Status Report
Overview of the status report and where to find it on a site.